【摘要】 本文对断裂力学中广泛应用的光弹性确定应力强度因子双项式法的适用程度进行了讨论。通过理论分析及实验研究,得出了不能将双项式法做为一个普遍适用的方法来应用。提出了一个验证双项式法是否适用的方法.对于双项式法适用的情况,提出了一个确定应力强度因子的直线法。通过单边直裂纹拉伸及三点弯曲实验,对所提供的方法进行了验证。更多还原

【Abstract】 In this paper the applicability of the two-term method of photoelastic determination of SIF which has been widely used in fracture mechanics is discussed. Through theoretical analysis and experimental investigation, aconclusion is drawn that methods of this kind are not applicable conventionally. Then a testing method is provided to verify whether the two-term method can be used in a given case, and a new method of "Straight Line" is also provided to determine the factors of stress intensity This new method mentioned above were supported by the tensile test of straight cracking in a single side the three-point bent test.更多还原