压痕硬度测试有限元分析_孙渊.pdf

Vol. 33 No. 6 ( ) 883 2007- 12 Journal of East Chin a University of S ien e and Te hnology ( Natural S ien e Edition) : 1006-3080( 2007) 06-0883-05 1, 2 1 孙 渊 , 王庆明 ( 1. 华东理工大学机械与动力工程学院, 上海200237; 2. 上海电机学院机械工程系, 上海200240) : 根据压痕硬度测试理论, 立了有限元模型通过有限元手段分析了金属材料在不同载 荷作用下的压入过程, 了解在压痕硬度试验过程中压痕周围所产生的应力分布, 计算了硬度HB 值, 与在硬度试验中所测的HB 值吻合, 证实了模型和材料特性描述的可靠性, 在此基础上, 研究了 不同硬度的试件, 载荷对压痕参数和压痕周围应力分布的影响结果表明: 载荷大小直接影响压痕 深度隆起部分回弹量和塑性区域大小, 随着载荷的增加, 压痕深度隆起部分回弹量和塑性区域 大小均有不同程度的增加, 增加的程度与材料的硬度有关, 而且随着载荷的增加, 压入深度加深, 压痕周围塑性区域逐渐扩大, 其硬度值和塑性区域逐渐趋于稳定范围 : 压入过程; 有限元分析; 硬度; 压痕参数; 应力分布 : T B302 : A Analysis on the Indentation Hardness Measurement Finite Element Method S UN Yuan 1 2, WA N G Qing-ming 1 ( 1. School of M echanical and P ow er Eng ineer ing , Eas Ch ina Univ er s i y of Sc ie nce and Technology , Shang hai 200237, Ch ina; 2. M echanical Eng ineer ing School, Shang hai D ianj i Univ ers i y , Shang hai 200240, Ch ina) Abstract: Based on the theory of indentation hardness measurement, this paper investigates the inden- tation pro ess of metal mater ials under differ ent load by finite element method. It reveals the stress distr-i bution ar ound the indentation. T he al ulated har dness HB values oin ide w ith the measured value. Spe -i mens w ith different hardness are investigated for the effe ts of parameters of indent ation to the stress dis- tribution. Results show that the loads affe t the depth of indentation, heigh