摘要
分析了目前钢结构防断选材中应用的脆性转变温度方法的局限性,扼要介绍了材料断裂韧度的温度效应和加载速率效应.在钢材断裂特性分析的基础上提出了平面应变型断裂临界温度的概念,构建了断裂特征分析图,从而为钢结构防动载断裂选材提出了一个新的定量的判据,并以船只设计选材为例,阐明了该判据的应用.
The limitations of brittle-ductile transition temperature criterions now being widely used in material choice in fracture control for steel constructions have been analyzed. It is suggested that not taking into account the loading rate effect of steel should be the major reason The influences of temperature and loading rate on fracture toughness of material were briefly introduced. The critical temperature for plain strain fracture was proposed based on the analysis of material fracture behaviors. Fracture Characteristic Analysis Map （FCAM） established on the basis of the critical temperature for plain strain fracture can be used as a new quantitative criterion for material choice in dynamic fracture control design. The application of FCAM has been explained through the material choice in practice of ship design.
出处
《材料科学与工艺》
EI
CAS
CSCD
北大核心
2005年第4期431-434,共4页
Materials Science and Technology
关键词
钢结构
温度效应
加载速率效应
断裂控制
判据
steel constructions
temperature effect
loading rate effect
fracture control
criterion
