【摘要】 通过构造反向传播神经网络 ,对裂纹尖端的应力场进行学习 ,进而实现对裂纹尖端应力场函数的逼近。经过学习的网格具有相当的联想、记忆能力和一定的稳定性 ,并且可以快速、准确地计算实际情况中带裂纹构件的裂纹尖端应力场 ,确定裂纹尖端的塑性区。便于分析带裂纹构件裂纹的扩展更多还原

【Abstract】 The constructed Back-Propagation Neural Network (BPNN) can be used to learn the stress field around the crack tip. Then the approximation of the stress field around the crack tip was achieved. The trained neural network has the ability of association and memory. At the same time, it can calculate the stress field of the component with a arack in reality quickly and correctly, confirming to the plastic region. With the trained network, the component can to be analyzed easily and conveniently.更多还原