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Beltrán-Guijarro M, Pérez-Pevida E, Chávarri-Prado D, Estrada-Martínez A, Diéguez-Pereira M, Sánchez-Lasheras F, Brizuela-Velasco A. Biomechanical Effects of Ti-Base Abutment Height on the Dental Implant System: A Finite Element Analysis. J Funct Biomater 2024; 15:101. [PMID: 38667558 PMCID: PMC11051524 DOI: 10.3390/jfb15040101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Revised: 04/01/2024] [Accepted: 04/02/2024] [Indexed: 04/28/2024] Open
Abstract
This study aims to analyse, using a finite element analysis, the effects of Ti-base abutment height on the distribution and magnitude of transferred load and the resulting bone microstrain in the bone-implant system. A three-dimensional bone model of the mandibular premolar section was created with an implant placed in a juxta-osseous position. Three prosthetic models were designed: a 1 mm-high titanium-base (Ti-base) abutment with an 8 mm-high cemented monolithic zirconia crown was designed for model A, a 2 mm-high Ti-base abutment with a 7 mm-high crown for model B, and a 3 mm-high abutment with a 6 mm-high crown for model C. A static load of 150 N was applied to the central fossa at a six-degree angle with respect to the axial axis of the implant to evaluate the magnitude and distribution of load transfer and microstrain. The results showed a trend towards a direct linear association between the increase in the height of the Ti-base abutments and the increase in the transferred stress and the resulting microstrain to both the prosthetic elements and the bone/implant system. An increase in transferred stress and deformation of all elements of the system, within physiological ranges, was observed as the size of the Ti-base abutment increased.
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Affiliation(s)
- Miguel Beltrán-Guijarro
- Department of Surgery, Faculty of Medicine, University of Salamanca, 37007 Salamanca, Spain;
- Department of Surgery, Faculty of Sports and Health Sciences, University of Zaragoza, 22006 Huesca, Spain
| | - Esteban Pérez-Pevida
- Department of Surgery, Faculty of Medicine, University of Salamanca, 37007 Salamanca, Spain;
- Faculty of Health Sciences, Miguel de Cervantes European University, 47012 Valladolid, Spain; (D.C.-P.); (A.E.-M.); (M.D.-P.); (A.B.-V.)
| | - David Chávarri-Prado
- Faculty of Health Sciences, Miguel de Cervantes European University, 47012 Valladolid, Spain; (D.C.-P.); (A.E.-M.); (M.D.-P.); (A.B.-V.)
| | - Alejandro Estrada-Martínez
- Faculty of Health Sciences, Miguel de Cervantes European University, 47012 Valladolid, Spain; (D.C.-P.); (A.E.-M.); (M.D.-P.); (A.B.-V.)
| | - Markel Diéguez-Pereira
- Faculty of Health Sciences, Miguel de Cervantes European University, 47012 Valladolid, Spain; (D.C.-P.); (A.E.-M.); (M.D.-P.); (A.B.-V.)
| | - Fernando Sánchez-Lasheras
- Department of Mathematics, University Institute of Space Sciences and Technologies of Asturias (ICTEA), University of Oviedo, 33006 Oviedo, Spain;
| | - Aritza Brizuela-Velasco
- Faculty of Health Sciences, Miguel de Cervantes European University, 47012 Valladolid, Spain; (D.C.-P.); (A.E.-M.); (M.D.-P.); (A.B.-V.)
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Kurkin A, Khrobostov A, Andreev V, Andreeva O. Assessing and Forecasting Fatigue Strength of Metals and Alloys under Cyclic Loads. Materials (Basel) 2024; 17:1489. [PMID: 38612004 PMCID: PMC11012544 DOI: 10.3390/ma17071489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Revised: 03/18/2024] [Accepted: 03/19/2024] [Indexed: 04/14/2024]
Abstract
Within the scope of this research, patterns of changes in the fatigue life and limit of metals under cyclic stress were identified and the most informative parameters were determined as the basis for developing a method for the universal transformation of experimental data on the fatigue of metals and alloys for their subsequent generalization. Experimental data on metal fatigue, obtained by a large number of authors for a wide range of grades of steels and alloys, under the influence of various combinations of factors, were systematized. A generalized dependence of the recalculated parameters of fatigue life and limit was obtained, its characteristics were assessed, and a sensitivity analysis was performed, confirming the universal nature of the obtained dependence. A system of parameters has been proposed making it possible to consider and forecast high-cycle fatigue processes for a wide range of metals and alloys, under the conditions of various combinations of operating factors, from unified positions and a more general point of view.
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Affiliation(s)
- Andrey Kurkin
- Department of Applied Mathematics, Nizhny Novgorod State Technical University, n.a. R.E. Alekseev, 603155 Nizhny Novgorod, Russia
| | - Alexander Khrobostov
- Department of Nuclear Energy and Technical Physics, Nizhny Novgorod State Technical University, n.a. R.E. Alekseev, 603155 Nizhny Novgorod, Russia; (A.K.); (V.A.); (O.A.)
| | - Vyacheslav Andreev
- Department of Nuclear Energy and Technical Physics, Nizhny Novgorod State Technical University, n.a. R.E. Alekseev, 603155 Nizhny Novgorod, Russia; (A.K.); (V.A.); (O.A.)
| | - Olga Andreeva
- Department of Nuclear Energy and Technical Physics, Nizhny Novgorod State Technical University, n.a. R.E. Alekseev, 603155 Nizhny Novgorod, Russia; (A.K.); (V.A.); (O.A.)
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Saeed K, Mcilhagger A, Dooher T, Ullah J, Manzoor F, Velay X, Archer E. Lap Shear Strength and Fatigue Analysis of Continuous Carbon-Fibre-Reinforced 3D-Printed Thermoplastic Composites by Varying the Load and Fibre Content. Polymers (Basel) 2024; 16:579. [PMID: 38475263 DOI: 10.3390/polym16050579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 02/02/2024] [Accepted: 02/15/2024] [Indexed: 03/14/2024] Open
Abstract
This study focuses on evaluating the fatigue life performance of 3D-printed polymer composites produced through the fused deposition modelling (FDM) technique. Fatigue life assessment is essential in designing components for industries like aerospace, medical, and automotive, as it provides an estimate of the component's safe service life during operation. While there is a lack of detailed research on the fatigue behaviour of 3D-printed polymer composites, this paper aims to fill that gap. Fatigue tests were conducted on the 3D-printed polymer composites under various loading conditions, and static (tensile) tests were performed to determine their ultimate tensile strength. The fatigue testing load ranged from 80% to 98% of the total static load. The results showed that the fatigue life of the pressed samples using a platen press was significantly better than that of the non-pressed samples. Samples subjected to fatigue testing at 80% of the ultimate tensile strength (UTS) did not experience failure even after 1 million cycles, while samples tested at 90% of UTS failed after 50,000 cycles, with the failure being characterized as splitting and clamp area failure. This study also included a lap shear analysis of the 3D-printed samples, comparing those that were bonded using a two-part Araldite glue to those that were fabricated as a single piece using the Markforged Mark Two 3D printer. In summary, this study sheds light on the fatigue life performance of 3D-printed polymer composites fabricated using the FDM technique. The results suggest that the use of post-printing platen press improved the fatigue life of 3D-printed samples, and that single printed samples have better strength of about 265 MPa than adhesively bonded samples in which the strength was 56 MPa.
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Affiliation(s)
- Khalid Saeed
- Mechanical Engineering Department, Atlantic Technological University, Ash Lane Sligo, F91 YW50 County Sligo, Ireland
| | - Alistair Mcilhagger
- Engineering Research Institute, Ulster University, York Street, Belfast BT1 5ED, Co. Antrim, UK
| | - Thomas Dooher
- The Northern Ireland Advanced Composites and Engineering Centre, Belfast BT3 9EF, Co. Antrim, UK
| | - Jawad Ullah
- Engineering Research Institute, Ulster University, York Street, Belfast BT1 5ED, Co. Antrim, UK
| | - Faisal Manzoor
- Engineering Research Institute, Ulster University, York Street, Belfast BT1 5ED, Co. Antrim, UK
| | - Xavier Velay
- Mechanical Engineering Department, Atlantic Technological University, Ash Lane Sligo, F91 YW50 County Sligo, Ireland
| | - Edward Archer
- Engineering Research Institute, Ulster University, York Street, Belfast BT1 5ED, Co. Antrim, UK
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Gao L, Wang J, Liang J, Yao W, Zhou L, Huang X. Study of fatigue damage to the cochlea. Comput Methods Biomech Biomed Engin 2023; 26:2047-2056. [PMID: 36629847 DOI: 10.1080/10255842.2022.2164712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 11/17/2022] [Accepted: 12/28/2022] [Indexed: 01/12/2023]
Abstract
In order to explore the hearing loss resulting from exposure to continuous or intermittent loud noise. A three-dimensional liquid-solid coupling finite element model of spiral cochlea was established. The reliability of the model was verified, and the stress and amplitude of the basilar membrane of the pivotal structure in cochlea were analyzed. The results show that under the action of the same high-pressure sound, the preferential fatigue area of the cochlear high-frequency area mainly causes fatigue in the cochlear. The safer area is a sound pressure level below 70 dB, while one above 90 dB accelerates damage to the ear.
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Affiliation(s)
- Lei Gao
- School of Mechanics and Engineering Science, Shanghai University, Shanghai, China
- Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai, China
| | - Jiakun Wang
- School of Mechanics and Engineering Science, Shanghai University, Shanghai, China
- Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai, China
| | - Junyi Liang
- Genomic Medicine Institute, Lerner Research Institute, Cleveland Clinic Foundation, Cleveland, OH, USA
| | - Wenjuan Yao
- School of Mechanics and Engineering Science, Shanghai University, Shanghai, China
- Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai, China
| | - Lei Zhou
- Otorhinolaryngology-Head and Neck Surgery, Zhongshan Hospital affiliated to Fudan University, Shanghai, China
| | - Xinsheng Huang
- Otorhinolaryngology-Head and Neck Surgery, Zhongshan Hospital affiliated to Fudan University, Shanghai, China
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Kim DY, Kim JW, Ha JS, Jo AR, Lee SY, Jeong MS, Ko DC, Jang JS. Prediction of Extrusion Machine Stem Fatigue Life Using Structural and Fatigue Analysis. Materials (Basel) 2023; 16:3192. [PMID: 37110028 PMCID: PMC10146973 DOI: 10.3390/ma16083192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 04/12/2023] [Accepted: 04/14/2023] [Indexed: 06/19/2023]
Abstract
In this study, the characteristics of the SKD61 material used for the stem of an extruder were analyzed through structural analysis, tensile testing, and fatigue testing. The extruder works by pushing a cylindrical billet into a die with a stem to reduce its cross-sectional area and increase its length, and it is currently used to extrude complex and diverse shapes of products in the field of plastic deformation processes. Finite element analysis was used to determine the maximum stress on the stem, which was found to be 1152 MPa, lower than the yield strength of 1325 MPa obtained from tensile testing. Fatigue testing was conducted using the stress-life (S-N) method, considering the characteristics of the stem, and statistical fatigue testing was employed to create an S-N curve. The predicted minimum fatigue life of the stem at room temperature was 424,998 cycles at the location with the highest stress, and the fatigue life decreased with increasing temperature. Overall, this study provides useful information for predicting the fatigue life of extruder stems and improving their durability.
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Affiliation(s)
- Dong-Yul Kim
- Gyeongbuk Research Institute of Vehicle Embedded Technology, Yeongcheon-si 38822, Republic of Korea;
| | - Ji-Wook Kim
- Smart Manufacturing Technology R&D Group, Korea Institute of Industrial Technology, Daegu 42994, Republic of Korea; (J.-W.K.); (J.-S.H.); (A.-R.J.); (S.-Y.L.); (M.-S.J.)
| | - Jin-Su Ha
- Smart Manufacturing Technology R&D Group, Korea Institute of Industrial Technology, Daegu 42994, Republic of Korea; (J.-W.K.); (J.-S.H.); (A.-R.J.); (S.-Y.L.); (M.-S.J.)
| | - A-Ra Jo
- Smart Manufacturing Technology R&D Group, Korea Institute of Industrial Technology, Daegu 42994, Republic of Korea; (J.-W.K.); (J.-S.H.); (A.-R.J.); (S.-Y.L.); (M.-S.J.)
| | - Sung-Yun Lee
- Smart Manufacturing Technology R&D Group, Korea Institute of Industrial Technology, Daegu 42994, Republic of Korea; (J.-W.K.); (J.-S.H.); (A.-R.J.); (S.-Y.L.); (M.-S.J.)
| | - Myeong-Sik Jeong
- Smart Manufacturing Technology R&D Group, Korea Institute of Industrial Technology, Daegu 42994, Republic of Korea; (J.-W.K.); (J.-S.H.); (A.-R.J.); (S.-Y.L.); (M.-S.J.)
| | - Dae-Cheol Ko
- Department of Nanomechatronics Engineering, Pusan National University, Pusan 46241, Republic of Korea
| | - Jin-Seok Jang
- Smart Manufacturing Technology R&D Group, Korea Institute of Industrial Technology, Daegu 42994, Republic of Korea; (J.-W.K.); (J.-S.H.); (A.-R.J.); (S.-Y.L.); (M.-S.J.)
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Buccino F, Cervellera F, Ghidini M, Marini R, Bagherifard S, Vergani LM. Isolating the Role of Bone Lacunar Morphology on Static and Fatigue Fracture Progression through Numerical Simulations. Materials (Basel) 2023; 16:1931. [PMID: 36903046 PMCID: PMC10004234 DOI: 10.3390/ma16051931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Revised: 02/13/2023] [Accepted: 02/23/2023] [Indexed: 06/18/2023]
Abstract
Currently, the onset of bone damage and the interaction of cracks with the surrounding micro-architecture are still black boxes. With the motivation to address this issue, our research targets isolating lacunar morphological and densitometric effects on crack advancement under both static and cyclic loading conditions by implementing static extended finite element models (XFEM) and fatigue analyses. The effect of lacunar pathological alterations on damage initiation and progression is evaluated; the results indicate that high lacunar density considerably reduces the mechanical strength of the specimens, resulting as the most influencing parameter among the studied ones. Lacunar size has a lower effect on mechanical strength, reducing it by 2%. Additionally, specific lacunar alignments play a key role in deviating the crack path, eventually slowing its progression. This could shed some light on evaluating the effects of lacunar alterations on fracture evolution in the presence of pathologies.
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Nakhaei M, Sterba M, Foletti JM, Badih L, Behr M. Experimental analysis and numerical fatigue life prediction of 3D-Printed osteosynthesis plates. Front Bioeng Biotechnol 2023; 11:1133869. [PMID: 37034247 PMCID: PMC10073497 DOI: 10.3389/fbioe.2023.1133869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Accepted: 03/10/2023] [Indexed: 04/11/2023] Open
Abstract
The trend towards patient-specific medical orthopedic prostheses has led to an increased use of 3D-printed surgical implants made of Ti6Al4V. However, uncertainties arise due to varying printing parameters, particularly with regards to the fatigue limit. This necessitates time-consuming and costly experimental validation before they can be safely used on patients. To address this issue, this study aimed to employ a stress-life fatigue analysis approach coupled with a finite element (FE) simulation to estimate numerically the fatigue limit and location of failure for 3D-printed surgical osteosynthesis plates and to validate the results experimentally. However, predicting the fatigue life of 3D components is not a new concept and has previously been implemented in the medical device field, though without experimental validation. Then, an experimental fatigue test was conducted using a proposed modification to the staircase method introduced in ISO 12107. Additionally, a FE model was developed to estimate the stress cycles on the plate. The stress versus number of cycles to failure curve (S-N) obtained from the minimum mechanical properties of 3D-printed Ti6AI4V alloy according to ASTM F3001-14 to predict the fatigue limit. The comparison between experimental results and fatigue numerical predictions showed very good agreement. It was found that a linear elastic FE model was sufficient to estimate the fatigue limit, while an elastic-plastic model led to an accurate prediction throughout the implant's cyclic life. The proposed method has great potential for enhancing patient-specific implant designs without the need for time-consuming and costly experimental regulatory testing.
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Affiliation(s)
- Mohsen Nakhaei
- Glad Medical SAS, Salon De Provence, France
- *Correspondence: Mohsen Nakhaei,
| | | | - Jean-Marc Foletti
- Aix Marseille Université, Université Gustave Eiffel, LBA, Marseille, France
- Assistance Publique, Hôpitaux de Marseille, Marseille, France
| | | | - Michel Behr
- Aix Marseille Université, Université Gustave Eiffel, LBA, Marseille, France
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Alshoaibi AM. Fatigue Crack Growth Analysis under Constant Amplitude Loading Using Finite Element Method. Materials (Basel) 2022; 15:ma15082937. [PMID: 35454630 PMCID: PMC9026441 DOI: 10.3390/ma15082937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Revised: 04/13/2022] [Accepted: 04/15/2022] [Indexed: 12/10/2022]
Abstract
Damage tolerant design relies on accurately predicting the growth rate and path of fatigue cracks under constant and variable amplitude loading. ANSYS Mechanical R19.2 was used to perform a numerical analysis of fatigue crack growth assuming a linear elastic and isotropic material subjected to constant amplitude loading. A novel feature termed Separating Morphing and Adaptive Remeshing Technology (SMART) was used in conjunction with the Unstructured Mesh Method (UMM) to accomplish this goal. For the modified compact tension specimen with a varied pre-crack location, the crack propagation path, stress intensity factors, and fatigue life cycles were predicted for various stress ratio values. The influence of stress ratio on fatigue life cycles and equivalent stress intensity factor was investigated for stress ratios ranging from 0 to 0.8. It was found that fatigue life and von Mises stress distribution are substantially influenced by the stress ratio. The von Mises stress decreased as the stress ratio increased, and the number of fatigue life cycles increased rapidly with the increasing stress ratio. Depending on the pre-crack position, the hole is the primary attraction for the propagation of fatigue cracks, and the crack may either curve its direction and grow towards it, or it might bypass the hole and propagate elsewhere. Experimental and numerical crack growth studies reported in the literature have validated the findings of this simulation in terms of crack propagation paths.
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Affiliation(s)
- Abdulnaser M Alshoaibi
- Mechanical Engineering Department, Faculty of Engineering, Jazan University, P.O. Box 114, Jazan 45142, Saudi Arabia
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Roda-Casanova V, Pérez-González A, Zubizarreta-Macho Á, Faus-Matoses V. Fatigue Analysis of NiTi Rotary Endodontic Files through Finite Element Simulation: Effect of Root Canal Geometry on Fatigue Life. J Clin Med 2021; 10:jcm10235692. [PMID: 34884394 PMCID: PMC8658234 DOI: 10.3390/jcm10235692] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 11/26/2021] [Accepted: 11/29/2021] [Indexed: 10/26/2022] Open
Abstract
This article describes a numerical procedure for estimating the fatigue life of NiTi endodontic rotary files. An enhanced finite element model reproducing the interaction of the endodontic file rotating inside the root canal was developed, which includes important phenomena that allowed increasing the degree of realism of the simulation. A method based on the critical plane approach was proposed for extracting significant strain results from finite element analysis, which were used in combination with the Coffin-Manson relation to predict the fatigue life of the NiTi rotary files. The proposed procedure is illustrated with several numerical examples in which different combinations of endodontic rotary files and root canal geometries were investigated. By using these analyses, the effect of the radius of curvature and the angle of curvature of the root canal on the fatigue life of the rotary files was analysed. The results confirm the significant influence of the root canal geometry on the fatigue life of the NiTi rotary files and reveal the higher importance of the radius of curvature with respect to the angle of curvature of the root canal.
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Affiliation(s)
- Victor Roda-Casanova
- Department of Mechanical Engineering and Construction, Universitat Jaume I, 12071 Castelló de la Plana, Spain; (V.R.-C.); (A.P.-G.)
| | - Antonio Pérez-González
- Department of Mechanical Engineering and Construction, Universitat Jaume I, 12071 Castelló de la Plana, Spain; (V.R.-C.); (A.P.-G.)
| | - Álvaro Zubizarreta-Macho
- Department of Dentistry, Alfonso X el Sabio University, 28691 Madrid, Spain
- Department of Orthodontics, University of Salamanca, 37008 Salamanca, Spain
- Correspondence:
| | - Vicente Faus-Matoses
- Department of Stomatology, Faculty of Medicine and Dentistry, University of Valencia, 46010 Valencia, Spain;
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Hong X, Jiaqi W, Moyan Z, Guangpeng L, Nadakatti MM. Frequency spectrum and fatigue analysis of T-bolt fracture in DT III fastener based on Refined Model. Sci Prog 2020; 103:36850420950132. [PMID: 32935621 PMCID: PMC10451059 DOI: 10.1177/0036850420950132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
It is observed that T-bolt fracture of DT III fastener affects the safety of railway operations. The present study is aimed at finding solution to this critical issue of DT III T-bolt fracture. The paper is based on outcomes of field studies and analysis of relationship between bolt installation torque and stress. A refined DT III fastener model is established based on test data and nonlinear contact theory as per the actual size of each component. It is being observed that head-shank joint is a critical area during service. With respect to fatigue and stress, when the installation torque is less than 300 KN-mm, the bolt is prevented from yielding during installation. To a certain extent it also improves the fatigue life of bolt. From the frequency spectrum point of view, the vibration sensitive frequency band (1050-1100 Hz, 1230-1270 Hz) of bolt in service is very close to the main frequency of bolt vibration (1200 Hz). It may cause bolt fracture. In order to avoid resonance, the train operational speed should be strictly controlled between 115 km/h and 120 km/h.
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Affiliation(s)
- Xiao Hong
- Beijing Key Laboratory of Track Engineering, Beijing Jiaotong University, Beijing, China
| | - Wang Jiaqi
- Beijing Key Laboratory of Track Engineering, Beijing Jiaotong University, Beijing, China
| | - Zhang Moyan
- Beijing Key Laboratory of Track Engineering, Beijing Jiaotong University, Beijing, China
| | - Liu Guangpeng
- Beijing Key Laboratory of Track Engineering, Beijing Jiaotong University, Beijing, China
| | - Mahantesh M. Nadakatti
- Department of Mechanical Engineering, KLS Gogte Institute of Technology, Belagavi, India
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SANNINO G, POZZI A, SCHIAVETTI R, BARLATTANI A. Stress distribution on a three-unit implant-supported zirconia framework. A 3D finite element analysis and fatigue test. Oral Implantol (Rome) 2012; 5:11-20. [PMID: 23285401 PMCID: PMC3533980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
PURPOSE The purpose of this study was to investigate, by finite element analysis (FEA) and fatigue analysis, the influence of different loading conditions on the stress distribution in a 3-unit implant-supported Y-TZP fixed partial denture (FPD). MATERIAL AND METHODS A three-dimensional FEM model was developed. The materials used in this study were assumed to be linearly elastic, homogeneous and isotropic. 100 N and 300 N loads over a 0,5 mm(2) areas with different angles (0°, 15° and 35°) and locations were applied on the prosthesis and the distribution of equivalent von Mises stress was investigated. A fatigue analysis was carried out too. RESULTS Maximum stresses were found at the connector region of the framework when the intermediate element is loaded (100 N load pattern: 32,9 MPa, 33 MPa and 51,8 MPa; 300 N load pattern: 98,6 MPa, 102,8 MPa and 155,7 MPa, respectively with 0°, 15° and 35° of inclination). Results confirmed the vulnerability of both connector areas even if just one pillar was loaded with an increase in stress when angle of load inclination is larger. The cyclic fatigue evaluation indicates a strong propensity for fatigue behavior, presenting a considerable range of loading conditions. No fracture fatigue occurred with a 100 N force. A 300 N force applied to the pontic produces no fatigue problems because the load is equally shared by whole system. A 300 N force applied to one of the two pillars, or to both implants generates fatigue problems. CONCLUSION F.E.M. analysis of a 3-unit implant-supported Y-TZPFPD, give accurate information about loading conditions for clinical success over time. Fatigue analysis results show structural reliability of the Y-TZP as framework material for 3-unit posterior FPDs.
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Affiliation(s)
- G. SANNINO
- Department of Prosthodontics, University of Rome “Tor Vergata”, School of Dentistry, Rome, Italy
| | - A. POZZI
- Department of Prosthodontics, University of Rome “Tor Vergata”, School of Dentistry, Rome, Italy
| | - R. SCHIAVETTI
- Department of Prosthodontics, University of Rome “Tor Vergata”, School of Dentistry, Rome, Italy
| | - A. BARLATTANI
- Department of Prosthodontics, Chief Department of Oral Health Science, University of Rome “Tor Vergata”, School of Dentistry, Rome, Italy
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