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本文分析了椭圆形裂缝参数α_0对格氏强度准则的影响,给出了包括α_0的格氏强度准则式(11).分析了格利菲思(Griffith)准则的适用范围,并给出了使用格氏强度准则的补充条件式(21).指出了格氏准则只适用部分拉压区,即式(10α)和式(21)之间的区域.分析了修正格氏强度准则,并给出了式(23)作为修正格氏准则的适用条件.据此,修正格氏强度准则也适用于部分拉压区.与现有试验资料进行比较,其结果是满意的.
This paper analyzes the influence of the elliptical crack parameter α_0 on the Grignard strength criterion, gives the Grignard strength criterion including α_0 (11), analyzes the applicable scope of the Griffith criterion, and gives the use of The supplemental conditional formula of the Grignard strength criterion (21) indicates that the Grignard criterion applies only to the region between the partial tension and compression zone, ie, between formula (10α) and formula (21). The modified Grignard strength criterion is analyzed and given Formula (23) is used as the applicable condition of the modified Grinds criterion. Based on this, the modified Grignard strength criterion also applies to the partial tension and compression zone. Compared with the existing experimental data, the result is satisfactory.