An Advanced Damage Percolation Model of Ductile Fracture
A multi-scale damage percolation model has been developed to predict fracture in advanced materials with heterogeneous particle distributions.The percolation model was implemented into a commercial finite-element code using so-called percolation elements to capture the complex stress-and strain-gradients that develop within the microstructure during deformation.In this approach,fracture is predicted as a direct consequence of the stress state,material properties and local conditions within the microstructure.Void nucleation,growth and coalescence models are applied for ellipsoidal voids subjected to general loading conditions.A novel void nucleation rule is employed for particle cracking based upon the particle morphology and stress state.A particle field generator has been implemented into the percolation software to generate representative particle fields based upon the field statistics obtained using x-ray micro-tomography.The percolation model was validated numerically and experimentally for an automotive-grade aluminum alloy in a notched tensile test used for material characterization.
Void Particle Nucleation Coalescence Multi-scale
Cliff Butcher Zengtao Chen Michael Worswick
Department of Mechanical and Mechatronics Engineering,University of Waterloo,Canada Department of Mechanical Engineering,University of New Brunswick,Canada
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）