提出一个用平均应力表示的有限板应变能释放率的近似计算法。这些结果与已有分析和数据进行了比较,其结果是很吻合的。然后此法应用于有不等裂纹和非轴向载荷板的一般情况,以及有中心孔的旋转圆盘。引言断裂力学正在成为设计脆性有缺陷材料的零件的强有力的方法。原则上,如果由简单形状试样确定了材料的断裂韧度Gc,其他所有具有任意的裂纹排列和载荷的零件的 An approximate method for calculating the strain energy release rate of a finite sheet is presented using the average stress. These results are compared with the previous analysis and data and the results are in good agreement. This method is then applied to the general case of unequal cracks and non-axial load plates, as well as a rotating disk with a central hole. Introduction Fracture mechanics is becoming a powerful method of designing parts for brittle, defective materials. In principle, if the material’s fracture toughness, Gc, is determined from a simple shaped specimen, all other parts that have an arbitrary crack arrangement and load