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To improve the fatigue life of a panel with grooves, the stress relief groove is added after machining the tangent round transition structure. The purpose of this method is to reduce the stress concentration at the edges of rounded transition structure in the present study. To confirm the effectiveness of the method, analyses were performed by using software for two-dimensional elastic problems based...
This paper presents mining the worst case of thermal fatigue life of solder joints on chip components used in vehicle electronics. Typical 36 cases with various solder shapes were examined. Thermal fatigue life including not only the crack initiation but also crack propagation was evaluated by using the finite element method. Based upon the case study's results, it was found that when a crack propagates...
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