冲击值与金属材料其他力学性能关系的研究  

STUDYING RELATIONSHIP OF IMPACT VALUE AND OTHER METAL MATERIAL PERFORMANCE

作　　者：梁永生[1] 孙明武[2] 张宪民 

机构地区：[1]河北建筑工程学院机械系,张家口075024 [2]河北旅游职业学院基建处,承德067000 [3]邢台德龙机械轧辊有限公司生产科,邢台054000

出　　处：《机械强度》2012年第3期441-444,共4页Journal of Mechanical Strength

基　　金：国家科技型中小型企业创新基金资助项目(09C26211102747)

摘　　要：通过试验研究与理论分析,确定缺口应力集中系数,找出缺口应力集中系数和应力强化系数之间的关系;通过40CrMnSiMoA数字化冲击试验数据分析结果,找出冲击值与材料缺口敏感性的关系、冲击裂纹形成功与疲劳裂纹形成寿命之间的关系;从而得出结论:对于高强度和超高强度材料,冲击功值对缺口试样疲劳裂纹形成寿命影响更大,且冲击功值较高的材料比冲击功值较低的材料在等应力条件下疲劳寿命长。Based on the results of tests and theory, a notch stress concentration coefficient was obtained, and a relation was found out between the notch stress concentration coefficient and the stress intensification coefficient; according to the analysis results of40CrMnSiMoA digital impact test data, it finds out the relation between the impact value and the sensibility of the material notch, and that between the shock crack initiation work and fatigue crack initiation life expectancy; it comes to the conclusion that： for high-strength and ultra-strength material, impact energy has greater influence on notch specimen fatigue crack initiation life expectancy, and the material with higher impact energy has longer fatigue life than those with lower impact energy under the same stress.

关 键 词：冲击值 应力集中系数 裂纹形成功 

分 类 号：TB302.3[一般工业技术—材料科学与工程]