Chen Jianqiao is a professor and Ph.D. advisor in the Department of Mechanics at Huazhong University of Science and Technology. He received his Ph.D. degree from Nagoya University. His research interests include: strength and reliability analysis of engineering materials, fracture mechanics and structural integrity, multidisciplin- ary design optimization.Corresponding author. Tel.: + 86 27 87543738. E-mail addresses: mech-chen@263.net (J. Chen), Tang Yuanfu is a Ph.D. student in the Department of Mechanics at Huazhong University of Science and Technology. His area of research includes optimization algorithms and optimization under uncertainty.huitangyuan@163. com (Y. Tang), Ge ltui received his Ph.D. from Huazhong University of Science and Technology in 2008, and then worked in Wuhan Iron and Steel (Group) Corp. His main research interests are optimization algorithm and reliability-based design optimization of composite materials.happygerui@126.com (R. Ge), An Qunli received his Ph.D. from Huazhong University of Science and Technology in 2001, and then became a teacher there. His main research interests are optimization design methods and high perfor- mance computing methods in composite material field. anqunli@163.com (Q. An), Guo Xiwei is a Ph.D. student at Huazhong University of Science and Technology. His main research area covers pedestrian evacuation dynamics and complex structure modeling.xiwguo@gmail.com (X. Guo).