单试样测试材料JId值方法的比较
Comparison of Determination Methods for JId Using Single Specimen
摘 要
利用示波冲击试验,以小角度多试样冲击试验结果为标准,对几种单试样测试材料动态弹塑性断裂韧度JId值的方法进行了比较.结果表明:最大载荷前能量方法只适用于测试启裂后无显著形变强化的高强钢;柔度变化率方法不宜于测试撕裂阻力较高的材料;而对于裂尖钝化时近似呈半圆形的材料,利用饱和伸张区宽度方法可以方便地得到材料的JId值.
单试样法
动态弹塑性断裂韧度
instrumented impact
single specimen method
dynamic ductile fracture toughness
Abstract
Utilizing instrumented impact test,different determination methods for dynamic ductile fracture toughness JId using single specimen were compared.The applied scopes of different single specimen methods were discussed based on the results from low blow tests.It is indicated that energy method before maximum loading is reasonable to the high strength steels which have little deformation strengthening after crack initiation,compliance changing rate method should not be used to evaluate the dynamic ductile fracture toughness of materials with high tearing resistance,and JId values could be obtained conveniently by determining critical stretch zone width for the material with a crack tip blunted along half circle.
中图分类号 O346.1
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收稿日期 2005/1/20
修改稿日期 2005/3/24
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备注周志方(1980-),男,安徽望江人,博士研究生.
引用该论文: ZHOU Zhi-fang,LIU Rui-tang,YANG Zhuo-qing,WANG Yu-zhen. Comparison of Determination Methods for JId Using Single Specimen[J]. Materials for mechancial engineering, 2006, 30(4): 23～25
周志方,刘瑞堂,杨卓青,王玉珍. 单试样测试材料JId值方法的比较[J]. 机械工程材料, 2006, 30(4): 23～25
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参考文献
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【2】Chen B Y,Shi Y W.A comparison of various dynamic elastoplastic fracture toughness evaluating procedure by instrumented impact test[J].Engineering Fracture Mechanics,1990,36(1):17-26.
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【4】Hai Qiu,Manabu Enoki,Yoshiaki Kawaguchi,et al.A model for the dynamic fracture toughness of ductile structural steel[J].Engineering Fracture Mechanics,2003,70:589-598.
【5】姜凤春,刘瑞堂,刘殿魁.动态弹塑性断裂韧性测试方法的比较研究[J].实验力学,1999,14(2):267-272.
【6】Server W L.General yielding of Charpy V notch and precracked Charpy specimens[J].Journal of Engineering Materials and Technology,1978,100:183-187.
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【8】Gregory P Gibson,Druce,S G.Some observations on J-R curves[A].Elastic-plastic Fracture Test Methods[C].Ann Arbor,MI:1985,166-182.
【2】Chen B Y,Shi Y W.A comparison of various dynamic elastoplastic fracture toughness evaluating procedure by instrumented impact test[J].Engineering Fracture Mechanics,1990,36(1):17-26.
【3】Rice J R,Paris P C,Merkle J G.Some further results of J-integral analysis and estimates[A].Progress in flaw growth and fracture toughness testing[C].Baltimore,Md:1973,245.
【4】Hai Qiu,Manabu Enoki,Yoshiaki Kawaguchi,et al.A model for the dynamic fracture toughness of ductile structural steel[J].Engineering Fracture Mechanics,2003,70:589-598.
【5】姜凤春,刘瑞堂,刘殿魁.动态弹塑性断裂韧性测试方法的比较研究[J].实验力学,1999,14(2):267-272.
【6】Server W L.General yielding of Charpy V notch and precracked Charpy specimens[J].Journal of Engineering Materials and Technology,1978,100:183-187.
【7】Lautridou J C.Crack initiation and stable crack growth resistance in A508 steels in relation to inclusion distribution[J].Engineering Fracture Mechanics,1981,15:55-71.
【8】Gregory P Gibson,Druce,S G.Some observations on J-R curves[A].Elastic-plastic Fracture Test Methods[C].Ann Arbor,MI:1985,166-182.
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