摘要
对采用Hopkinson气炮加载—CharpyV形冲击试样试验方法对焊接接头高应变率下的动态断裂韧度数据进行了分析研究 ,通过对试样断口形貌、冲击吸收功、断裂韧度及其影响因素进行分析 ,表明在高应变率加载条件下 ,焊接接头冲击试样断口形貌有特殊的表现 ,延伸带或钝化区的尺寸大小反映了裂纹萌生前的塑性变形大小 ,也反映了裂纹萌生功的变化趋势。同时说明焊接接头在高速动态冲击载荷作用下 ,其断裂韧度参量受组配强度、冲击速度及环境温度等因素影响显著 。
In this paper,by means of the test method that combing the Hopkinson device of gas gun loading model with the measuring technique of Charpy V notch specimen in gas gun device of split Hopkinson pressure bar,the dynamic toughness of welded joint and several factors affecting with high loading rate were studied.The results showed that the impact specimen has a special fracture apearance and the size of ductile fracture zone expressed the value of plastic deformation of crack.The value of parameters of fracture toughness of welded joint were affected seriously by some factors such as loading rate,matching strength and ambient humidity.The value of fracture toughness of heat affected zone represented the dynamic toughness of welded joint.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2002年第4期53-56,共4页
Transactions of The China Welding Institution
关键词
焊接接头
高加载速率
动态断裂韧度
影响因素
welded joint
high loading rate
dynamic fracture toughness
affected factors
