Prediction of Fatigue Failure Location on Lower Control Arm Using Finite Element Analysis (Stress Life Method)

2019 ◽  
pp. 33-39
Author(s):  
S. K. Abu Bakar ◽  
Rosdi Daud ◽  
H. Mas Ayu ◽  
M. S. Salwani ◽  
A. Shah
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Fatigue Failure ◽  
Element Analysis ◽  
Lower Control Arm ◽  
Failure Location

Burst Pressure of Pressurized Cylinders With Hillside Nozzle

2009 ◽  
Vol 131 (4) ◽  
Author(s):  
H. F. Wang ◽  
Z. F. Sang ◽  
L. P. Xue ◽  
G. E. O. Widera
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Experimental Models ◽  
Burst Pressure ◽  
Element Analysis ◽  
Test Models ◽  
Scale Test ◽  
Failure Location ◽  
Dimensional Instability ◽  
Good Agreement

The burst pressure of cylinders with hillside nozzle is determined using both experimental and finite element analysis (FEA) approaches. Three full-scale test models with different angles of the hillside nozzle were designed and fabricated specifically for a hydrostatic test in which the cylinders were pressurized with water. 3D static nonlinear finite element simulations of the experimental models were performed to obtain the burst pressures. The burst pressure is defined as the internal pressure for which the structure approaches dimensional instability, i.e., unbounded strain for a small increment in pressure. Good agreement between the predicted and measured burst pressures shows that elastic-plastic finite element analysis is a viable option to estimate the burst pressure of the cylinders with hillside nozzles. The preliminary results also suggest that the failure location is near the longitudinal plane of the cylinder-nozzle intersection and that the burst pressure increases slightly with an increment in the angle of the hillside nozzle.

Design of Hybrid Lower Control Arm using Finite Element Analysis

2020 ◽  
Vol 44 (1) ◽  
pp. 49-56
Author(s):  
Seung Hyun Nam ◽  
Hyun Woo Kim ◽  
Soon Chan Kwon ◽  
Seong Kook Park ◽  
In Hee Park ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Element Analysis ◽  
Lower Control Arm

Scar-Like Self-Reinforced and Failure-Tolerant Dielectric Elastomer Actuator With AgNWs Electrode

2018 ◽  
Vol 85 (3) ◽  
Author(s):  
Mingqi Zhang ◽  
Yuhan Xie ◽  
Tingge Yao ◽  
Xunuo Cao ◽  
Zhen Zhang ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Dielectric Elastomer ◽  
Silver Nanowire ◽  
Sem Images ◽  
Element Analysis ◽  
Membrane Rupture ◽  
Failure Location ◽  
Electronic Microscope ◽  
Mechanical Rupture

Scar structures of natural animals can reinforce the wounds both mechanically and biologically to maintain the functions of the injured muscle and skin. Inspired by the scar structure, we present a dielectric elastomer (DE) with silver nanowire electrodes possessing the scar-like ability. This DE membrane can tolerate the failures by both electric breakdown and mechanical rupture. The DE actuator (DEA) can maintain their performances of force and displacement output after multiple failures. Scanning electronic microscope (SEM) images show that the scar-like structures accumulate around the electromechanical failure locations on the DE membrane as the stiffened and insulated regions, which prevent further short current and membrane rupture. J-integrals and stress distribution around the failure location have been calculated by finite element analysis to verify the mechanical reinforcements of the scar-like structures over crack propagation.

Finite Element Analysis of the Fatigue Strength of Threaded Fasteners Using Helical Thread Models

2009 ◽  
Author(s):  
Toshimichi Fukuoka ◽  
Masataka Nomura ◽  
Takashi Fuchikami
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Fatigue Failure ◽  
Stress Amplitude ◽  
Numerical Models ◽  
Bolted Joints ◽  
Element Analysis ◽  
Thread Root ◽  
External Forces ◽  
Fatigue Failures

Fatigue failures of bolted joints frequently lead to serious accidents of machines and structures. It is well known that fatigue failure is likely to occur around the first thread root of bolt adjacent to the nut loaded surface and the run-out of bolt thread. That is because high stress amplitudes are generated there due to alternating external forces. Accordingly, it is significantly important to evaluate the stress amplitudes along the thread root in order to better define the fatigue failure mechanism of bolted joints. In this study, stress amplitude distributions along the thread helix including the thread run-out are analyzed by three-dimensional finite element analysis, where the numerical models of bolted joints are constructed so as to accurately take account of the effect of thread helical geometry, using the modeling scheme proposed in the previous paper. The analytical objectives are bolted joints with axi-symmetric geometry except for the helical-shaped threaded portions, and are subjected to axi-symmetric external forces. It has been substantiated, based on the stress amplitude distributions along the thread helix, that the fatigue failures are likely to originate from the first bolt thread, as in the case of the maximum stress, and the run-out of threads. Also shown is that the fatigue failure location varies depending on the distance between the target bolt and the loading position and whether or not there is a separation at the plate interface.

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