scholarly journals Nonlinear finite element analysis of lumbar spine under mechanical load

2021 ◽  
Vol 2070 (1) ◽  
pp. 012216
Author(s):  
V Poojara ◽  
R Trivedi ◽  
B Modi ◽  
R Patel
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Lumbar Spine ◽  
Mechanical Load ◽  
Nonlinear Finite Element Analysis ◽  
Nonlinear Finite Element ◽  
Tetrahedral Mesh ◽  
Element Analysis ◽  
The Impact ◽  
The Relationship

Abstract Nonlinear Finite Element Analysis of lumbar spine is carried out using the optimisation software, to determine the effect of accidents on the human spine under mechanical loading. The lower two lumbar section – L4 and L5 of spinal cord is focussed in the present study. A simplified model of the L4-L5 vertebra was prepared. Bone material was taken as nonlinear and disc centre was modelled as hyper elastic. The ligaments are modelled as 1D truss elements. 2 D triangular mesh was generated and converted to 3D tetrahedral mesh. The range of force of 500 N to 1600N and moment of 7500 Nm was given as an input. The relationship of displacement, stress and strain with force is studied. The analysis was carried out and the results obtained depicted that the force varies depending on the impact of accidents. Conclusions are drawn and the relationship at different values of force was obtained.

Simulation Study on Armor-Piercing Effect of Armor-Piercing Bomb

2013 ◽  
Vol 456 ◽  
pp. 55-59
Author(s):  
Ren Bin Zhou ◽  
Xue Bing Liao ◽  
An Qing Ming ◽  
Yong Feng Zhang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Simulation Study ◽  
Nonlinear Finite Element Analysis ◽  
Nonlinear Finite Element ◽  
Analysis Program ◽  
Element Analysis ◽  
Aluminum Target

Studying the armor-piercing effect of armor-piercing bomb that attacks aluminum target is essential, because the target can be considered the simulation of the actual fight equipment. Based on the hypothesis about building the fraction field, the armor-piercing effect of armor-piercing bomb is analyzed, and the velocity and the intruding depth parameter model of armor-piercing effect are established. Taking a certain armor-piercing bomb as example, the intruding processes of armor-piercing effect are simulated by using the nonlinear finite element analysis program LS-DYNA, while aluminum target simulates the wall of combat equipment in two different conditions. At last, the finite element simulated results are given and analyzed that agree with the experiments.

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