Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第20卷    第12期    总第141期    2010年12月

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文章编号:1004-0609(2010)12-2336-08
材料弹性模量的仪器化压入测试方法
马德军

(装甲兵工程学院 机械工程系,北京 100072)

摘 要: 应用量纲定理和有限元方法对仪器化压入响应进行分析,同时引入联合弹性模量(Ec)来精确表示压头与被压材料的综合弹性效应。结果表明:名义硬度Hn和联合弹性模量Ec的比值与卸载功We和压入总功Wt的比值间存在近似的函数关系。基于上述关系,提出由名义硬度和压入比功确定材料弹性模量的新方法,同时分析该方法的理论误差,验证结果表明该方法较传统Oliver-Pharr方法具有更高的测试精度。

 

关键字: 弹性模量;仪器化压入;硬度;压入功;有限元方法

Method for determining elastic modulus by instrumented indentation test
MA De-jun

Department of Mechanical Engineering, The Academy of Armored Forces Engineering, Beijing 100072, China

Abstract:The instrumented indentation tests were analyzed by employing dimensional theorem and finite element method. A combined elastic modulus, Ec, was introduced to accurately reflect the combined elastic effect of an indenter and an indented material. Consequently, an approximate relationship between the ratio of nominal hardness to the combined elastic modulus and the ratio of unloading work to total work in indentation was revealed. Based on the relationship, a new method was then proposed for determining elastic modulus of materials, and its accuracy was analyzed. The effectiveness of the method was examined by several experimental examples.

 

Key words: elastic modulus; instrumented indentation; hardness; indentation work; finite element method

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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