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第二讲应力强度因子 1.裂纹尖端的应力强度因子在第一讲中已经指出,如果载荷对称于裂纹平面,并使裂纹受拉,则这样的裂纹叫
Second, the stress intensity factor 1. The stress intensity factor at the crack tip has been pointed out in the first lecture. If the load is symmetrical to the crack plane and the crack is pulled, then the crack is called