Research On Damage Mechanism Of Metal Plate Based On Peridynamics

In order to learn the damage mechanism of metal material,which is widely used in the structure of crane,a bond-based Peridynamic model for metal plate is built by using the basic theory of Peridynamics.According to the proposed model,the corresponding numerical calculation program is designed,and the validity of the model is demonstrated by the specific numerical examples and the tensile experiments of physical samples.Firstly,the basic theory of Peridynamics and the corresponding numerical methods are briefly introduced.Then,a progressive damage analysis method of metal plate based on Peridynamics is proposed.The basic parameters,such as the micro-modulus c and the critical stretch of the Peridynamic model of metal materials s0 are deduced by using the classical concepts of elastic deformation and maximum strain in the theory of material mechanics and elastic mechanics.The analysis program of the Peridynamic model of the metal plate is also designed,which provides the theoretical basis for solving the discontinuous problems of the metal plate.Secondly,the widely used and fairly developed method,Finite Element Method,is used in the field of progressive damage,and the finite element software,Abaqus,which has great advantages in the nonlinear analysis,is utilized.A secondary development of Python is applied to solve the problem automatically.Finally,Two metal plates of different crack angles are simulated.By comparing the FEM results with the Peridynamic results,the correctness of the Peridynamic model is confirmed.Finally,the damage propagation and the final failure mode are researched by the Experiment of the metal plate with a round hole subjected to the displacement-loading.The experimental results are compared with the Peridynamic simulation results,which further verified the validity and accuracy of Peridynamic model.