Numerical Modeling and Analysis of Dynamic Crack Propagation in Rubber
Dynamic crack propagation in rubber is modeled and analyzed numerically using the finite element method. The problem of a suddenly initiated crack at the center of stretched sheet is studied under plane stress conditions. A nonlinear finite element analysis using implicit time integration scheme is used. The bulk material behavior is described by finite-viscoelasticity theory and the fracture separation process is characterized using a cohesive zone model with a bilinear traction-separation law. Hence, the numerical model is able to model and predict the different contributions to the fracture toughness, i.e. the surface energy, viscoelastic dissipation, and inertia effects. The separation work per unit area and the cohesive strength has been parameterized, and their influence on the separation process has been investigated. A steadily propagating crack is obtained and the corresponding crack tip position and velocity history as well as the steady crack propagation velocity are evaluated and compared with the experimental data. A minimum threshold stretch of 3.0 is required for crack propagation. The numerical model is able to predict the dynamic crack growth such that the strength and the surface energy vary with the crack speed.
rubber crack viscoelasticity cohesive zone dynamic fracture
Elsiddig Elmukashfi Martin Kroon
Department of Solid Mechanics,Royal Institute of Technology,Osquars backe 1,SE-100 44 Stockholm,Sweden
国际会议
北京
英文
1-10
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）