摘要
本文对脆性材料受拉破坏机理进行了研究分析,提出“均强度”假说并通过实验验证,建立了不同尺寸试件的变曲强度的关系以及弯曲与拉伸强度之关系,并推导了脆性材料破坏发生区的解析表达式,有效地解释了弯曲强度的尺寸效应问题。本研究对脆性材料和陶瓷材料的力学性能的研究和评价有指导意义。
In this paper the destructive mechanism of brittle materials was investigated,the mean strength
criterion was presented and proved by expriments.Author discussed the bending strength and tensile
strength.Derived the analytical expression of ruptruc origin zone of brittle materials,it is effective to
explain the size effect of bending strength.Present studies will be very meaningful for researching and
evaluating mechanical properties of brittle materials or ceramics.
关键词
脆性材料
机械强度
尺寸效应
陶瓷
Size effect
Bending strength
Mean strength criterion
Rupture origin zone
Characteristic tensile strength
