Fracture Mechanics Analysis of Fourth Lumbar Vertebra in Method of Finite Element Analysis
Publish place: International journal of Advanced Biological and Biomedical Research، Vol: 2، Issue: 7
Publish Year: 1393
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_IJABBR-2-7_005
تاریخ نمایه سازی: 26 اسفند 1394
Abstract:
Objective: In this paper, finite element model of the L4 vertebra subjected to combination of compression and flexion loading in isotropic and anisotropic cases is investigated. Methods: In both cases, the vertebra is considered homogeneous. Also, the body of vertebra is divided to cancellous and cortical sections in anisotropic model, but the process is assumed isotropic such as isotropic model. The maximum Von Mises stress on the fourth lumbar vertebrae is obtained. Also, the stress intensity factor is analyzed with placing a small crack on the critical region of the model from view point of fracture mechanics. Furthermore, the required force for the fracture of fourth lumbar vertebrae is obtained through increasing the applied force for assumed model. Results: The results show that the highest stress value and its position is 7.237MPa in the upper pedicle region for anisotropic property of vertebrae. At the end of this article, stress intensity factors in different aspect ratios of crack for anisotropic vertebrae under combination of flexion and compression loading are plotted
Keywords:
Maximum stress Finite element analysis , Fourth lumbar vertebrae Fracture toughness , Stress intensity factor ,
Authors
Majid Ghadiri
Faculty of Engineering, Department of Mechanics, Imam Khomeini International University, Qazvin, Iran
Abbas Khanmohammadi
Faculty of Engineering, Department of Mechanics, Imam Khomeini International University, Qazvin, Iran
Hamid Reza Mahdavi
Faculty of Engineering, Department of Mechanics, Imam Khomeini International University, Qazvin, Iran
Marzieh Ahmadi
Faculty of Engineering, Department of Mechanics, Imam Khomeini International University, Qazvin, Iran