摘要
直裂纹三点弯曲圆梁是一种新型的断裂韧度试样［１～３］。本文推导了这种试样在约束朔性条件下的Ｊ积分估算公式，其结果与通常采用的矩形截面梁［４，５］不同。采用Ｚａｈｏｏｒ的推导方法［４］，所得结果没有深裂纹和净截面屈服的限制，这也区别于熟知的Ｒｉｃｅ方法［５］。
The straight-through cracked three-point bend round beam specimen is a new kind of fracturetoughness specimen[1 ～3]. In this paper,the J-integral estimation formula for this kind of specimen is formulated un-der the condition of contained plasticity. The method of formulation proposed by Zahoor[4] is used,the derived re-sults are different from those of the corresponding rectangular beam[4,5],and have no restriction of deep crack andnet section yielding,this is different from the well-known Rice's method [5].
出处
《机械强度》
CAS
CSCD
北大核心
1995年第1期13-16,共4页
Journal of Mechanical Strength
基金
国家自然科学基金
关键词
裂纹
断裂韧度
crack, fracture toughness
