| 1. | Maximum circumferential stress criterion of brittle fracture for v - notch
型切口脆性断裂的最大周向应力准则 |
| 2. | Standard test method for shear properties of composite materials by v - notched rail shear method
用v型切口梁剪切试验测定复合材料剪切特性的标准试验方法 |
| 3. | The directions of crack orientation and the critical loads predicted by the above criterions coincide with the experiment results
运用上述各准则对这些v型切口模型的裂纹起裂方向和临界载荷进行了理论预测，预测结果与实验结果基本吻合。 |
| 4. | In order to verify these criterions , tensile experiments are carried out for many kinds of samples made out of plexiglas with a planar v - notch under mixed - mode of i and ii
为了检验上述脆性断裂准则，用脆性材料pmma加工成多种型、 -复合型v型切口试样，进行了拉伸破坏实验。 |
| 5. | Based on the basic equations of the elasticity plane problem , displacement fields and singular stress fields near the v - notch tip under mixed - mode of i and ii are obtained for homogeneous materials by a new definition of the stress intensity factors
基于弹性力学平面问题的基本方程，通过重新定义应力强度因子，推导了均质材料-复合型v型切口尖端附近的位移场和奇异应力场。 |
| 6. | Based on the basic equations of the elasticity plane problem and the two airy stress functions in the thesis , stress singularity eigenequations and displacement fields as well as singular stress fields near the v - notch tip and the crack tip for homogeneous materials are obtained
本文基于弹性力学平面问题的基本方程，引入两个airy应力函数，推导了均质材料型切口尖端和裂纹尖端的应力奇异性特征方程及其附近的奇异应力场和位移场。 |
| 7. | Based on the theory of fracture mechanics , the relation between the critical stress intensity factors for v - notch kc and the plane strain crack toughness k10c and the brittle fracture criterion of the maximum circumferential stress for single and double stress singularity with the v - notch problems are proposed . experiments were carried out using two kinds of v - notched specimens made out of plexiglas to verify this brittle fracture criterion
本文基于断裂力学原理，推导出了型切口的临界应力强度因子k _ c与材料的平面应变断裂韧度k _ ( 10c )之间的关系，给出了平面单奇异性和双奇异性型切口问题的最大周向应力脆性断裂准则，并用有机玻璃板材加工了两种型切口试样，进行了实验验证。 |
| 8. | According to the strain energy density factor criterion under mixed - mode of i and ii , the distortional strain energy density factor criterion and dilatational strain energy density factor criterion are given . the twin shear stress criterion is applied to the v - notch problem under mixed - mode of i and ii
基于-复合型v型切口的应变能密度因子准则，提出了形状改变能密度因子准则和体积改变能密度因子准则，将双剪应力准则有效地应用到-复合型v型切口问题。 |
| 9. | By utilizing the above methods and the results of the finite element program named msc / nastran , the paper carries through specific calculations corresponding to the single stress singularity and the double stress singularity issues , which consist of the cracks for mode i , mode ii , the mixed mode crack of mode i and ii and many v - notched problems
利用上述数值方法和有限元程序msc nastran的数值分析结果，对型、型、与复合型平面裂纹以及多种型切口问题进行了具体计算。计算结果表明，本文所提出的数值方法具有简单、通用和精度高的特点，便于实际工程应用。 |
