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本文导出了与破损时线弹性应力强度因子弹性名义破损应力和两种材料参数有关的两参量断裂准则。断裂准则以前用于拉伸裁荷条件下簿板和厚板试样表面开裂和穿透裂纹的数据分析。本文的断裂准则则应用于中心裂纹拉伸试样、紧凑试样和缺口弯曲断裂试样,这些试样用钢、钛或鋁合金制成,在室温下进行试验。断裂数据包括了宽范围的裂纹长度、试样宽度和厚度。所分析的材料具有一个宽范围的拉伸性能。用此准则计算的破损应力与试验破损应力相当吻合(±10％)。同时还发現,此准则与不同试样类型(如中心裂纹拉伸试样和紧凑试样)所取得数据相关;对于同样材料、厚度和试验温度来说为±10％。
In this paper, we derive the two-parameter fracture criterion that is related to the elastic nominal stress of elasticity and the two kinds of material parameters when damaged. Fracture Criterion Previously used for surface crack and penetration crack analysis of specimen and plank specimens under tension and load conditions. The fracture criterion used in this article applies to central crack tensile specimens, compact specimens and notched bend specimens made of steel, titanium or aluminum alloy and tested at room temperature. Fracture data includes a wide range of crack lengths, specimen widths and thicknesses. The analyzed material has a wide range of tensile properties. The damage stress calculated by this criterion is in good agreement with the test damage stress (± 10%). It has also been found that this criterion is relevant to the data obtained for different specimen types (eg central crack tensile specimen and compact specimen); ± 10% for the same material, thickness and test temperature.