结果显示由于引线键合工艺、注塑工艺以及回流焊中封装体各部分不同的热膨胀系数引起的热应力和塑性变形是产生引脚跟断裂的主要因素。
The result shows that the plastic strain at the heel region induced by wire bonding process, molding process and the thermal stress and strain in solder reflow are the main causes of heel crack.
本文采用煤层断裂破坏指数、变形系数对煤裂隙发育程度进行综合评价，来预测高渗区。
An integrated evaluation of coal seam fracture development in terms of coal seam breaking index and deforming coefficient to predict high permeability area.
陶瓷材料具有良好的生物相容性、摩擦系数低，磨损小，耐磨力强，但陶瓷内衬断裂影响了陶瓷对陶瓷人工髋关节的长期效果。
Ceramics has good biocompatibility, low friction coefficient, and wear-resistance, but lined ceramics breakage affects long-term effect of ceramics to ceramics artificial hip joint.
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