It is shown that in general cases, the field intensity factors increase as the ratio of crack length to hole-size become large.
结果表明：应力强度因子随着裂纹和孔的相对尺寸的增加而增加。
The test of single compact weight decrease proved that when the shrinkage ratio of the compacting die is increased to over 1.22, there is no more crack initiated in the compact inner hole.
并用压坯单重递减法试验证实，当将压模收缩比增加到1 2 2以上时，可以保证压坯内孔不出现裂纹。
应用推荐