A micro-damage model of laser cladding particle reinforced composite coatings

作者：Lü Jun; Chai Guozhong^*; Gu Shengting; Bao Yumei

来源：Chinese Journal of Lasers, 2013, 40(2): 0203003.

DOI：10.3788/CJL201340.0203003

• Composites coating
• Constitutive behaviors
• Initial voids
• Laser technique
• Mean-field homogenizations
• Micro-damage model
• Microscopic damage
• Tensile behaviors

Combining a microscopic damage model based on the Gologanu-Leblond-Devaux constitutive behavior with Mori-Tanaka mean-field homogenization scheme, a ductile fracture model is established, which can describe damage progress of the particle reinforced composites coatings. The numerical simulations of damage model accounting for the effects of initial void shape, void size, void volume and particle damage on tensile behavior of laser-processed composite coatings are carried out. In addition, the prediction of the integrated homogenization-damage model is compared with experimental results of laser-cladding H13-TiC composite coatings. The results show that the theoretical prediction and experimental results on uniaxial tension stress-strain curves match well, and the error of maximum fracture strain is in certain range.

• 出版日期2013
• 单位浙江大学