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| 冲击值与金属材料其他力学性能关系的研究 | |
| 引用本文： | 梁永生,孙明武,张宪民.冲击值与金属材料其他力学性能关系的研究[J].机械强度,2012(3):441-444. |
| 作者姓名： | 梁永生 孙明武 张宪民 |
| 作者单位： | 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 |
| 基金项目： | 国家科技型中小型企业创新基金资助项目 |
| 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。 |
| 关 键 词： | 冲击值 应力集中系数 裂纹形成功 |
STUDYING RELATIONSHIP OF IMPACT VALUE AND OTHER METAL MATERIAL PERFORMANCE |
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| LIANG YongSheng , SUN MingWu , ZHANG XianMin.STUDYING RELATIONSHIP OF IMPACT VALUE AND OTHER METAL MATERIAL PERFORMANCE[J].Journal of Mechanical Strength,2012(3):441-444. | |
| Authors: | LIANG YongSheng SUN MingWu ZHANG XianMin |
| Affiliation: | 1.Department of Mechanical Engineering,Hebei Institute of Architectural and Ci vil Engineering,Zhangjiakou 075024,China)(2.Construction Department,Hebei Tourism Vocational College,Chengde 067000,Chi na)(3.Product Section,Xingtai Delong Machinery Mill Roll Co.Ltd,Xingtai 054000, China) |
| Abstract: | Based on the results of tests and theory,a notch stress concentration coefficie nt was obtained,and a relation was found out between the notch stress concentra tion coefficient and the stress intensification coefficient;according to the an alysis results of 40CrMnSiMoA digital impact test data,it finds out the relatio n between the impact value and the sensibility of the material notch,and that b etween the shock crack initiation work and fatigue crack initiation life expecta ncy;it comes to the conclusion that: for high-strength and ultra-strength mat erial,impact energy has greater influence on notch specimen fatigue crack initi ation life expectancy,and the material with higher impact energy has longer fat igue life than those with lower impact energy under the same stress. |
| Keywords: | Impact value Stress concentrated coefficients Crack forming energy |
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