Effects of loading rate and temperature on crack arrest behavior of hull steel in stiffened plate construction
Based on the residual strength diagram of non-stiffened plate construction,a residual strength diagram of hull steel in stiffened plate construction was proposed using the linear-elastic fracture mechanic theory in this work,the effects of loading rate and temperature on the crack arrest behavior of the stiffened plate construction were discussed,the lower limit of the residual strength and the dimension of a valid arrested crack were obtained via the theoretical analysis.The results demonstrated that,whether loading rate or temperature significantly influence the lower limit of the residual strength of the hull steel in a stiffened plate construction; under the conditions of 273K and 293K,the stiffened plate construction is a stiffener critical construction when the applied loading rate(K)is in the order of ~ 105 MPa (m/s),while under the loading rate of ~ 106 MPa( m/s),it becomes a skin critical construction due to the decrease of the fracture toughness of the full steel,the lower limit of residual strength is reduced to one fourth of the steel yield strength under this loading condition.In this case,the stiffened shipping construction is no longer adaptable to such a high loading rate,the crack arrest design is therefore highly desirable for protecting the full plate construction.
stiffened plate residual strength crack arrest loading rate and temperature effect
Chunhuan Guo Yanmei Song Fengchun Jiang Ruitang Liu
Key Laboratory of Superlight Materials & Surface Technology of Ministry of Education Harbin Engineering University,Harbin 150001,P.R.China
国际会议
北京
英文
1-8
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）