3D Micromechanical Modeling of Failure and Damage Evolution in Dual Phase Steel Based on a Real 2D M

• 作 者: M.R.Ayatollahi A.Ch.Darabi H.R.Chamani J.Kadkhodapour
• 机 构: Fatigue and Fracture Lab.,Center of Excellence in Experimental Solid Mechanics and Dynamics,School o
• 出 处: Acta Mechanica Solida Sinica
• 发表日期: 2016年01期
• 关键词: martensite annealing utilized ferrite uniformly localization ductile tensile nuc

A plate of dual phase steel was produced from low carbon steel with intercritical annealing treatment. Its optically determined surface microstructure was utilized to construct three different microstructural models. To describe the ductile damage in the ferritic matrix,the Gurson-Tvergaard-Needleman model was used with the failure in the martensite phase being ignored. The numerical results obtained for the mechanism of void initiation and coalescence were compared with the experimental observations. The numerical results obtained from the randomly extruded 3D model showed a significantly better agreement with the experimental ones than those obtained from the 2D model or the uniformly extruded 3D model.

A plate of dual phase steel was produced from low carbon steel with intercritical annealing treatment. It describes the ductile damage in the ferritic matrix, the Gurson-Tvergaard-Needleman model was used The numerical results obtained for the mechanism of void initiation and coalescence were compared with the experimental observations. The numerical results obtained from the random extruded 3D model showed a significantly better agreement with the experimental ones than that obtained from the 2D model or the extruded extruded 3D model.