Submitted on: 19 March 2018.
Revised on: 31 May 2018.
Accepted on: 18 June 2018.
___________________ENGINEERING FRACTURE MECHANICS
http://reply.papertrans.cn/1/85/8459/8459-12.png
http://reply.papertrans.cn/1/85/8459/8459-13.png
http://reply.papertrans.cn/1/85/8459/8459-14.png
http://reply.papertrans.cn/1/85/8459/8459-15.png
http://reply.papertrans.cn/1/85/8459/8459-16.png
http://reply.papertrans.cn/1/85/8459/8459-17.png
http://reply.papertrans.cn/1/85/8459/8459-18.png
Submitted on: 26 September 2019.
Revised on: 30 October 2019.
Accepted on: 29 November 2019.
___________________ENGINEERING FRACTURE MECHANICS
http://reply.papertrans.cn/1/85/8459/8459-20.png