利用硬度计进行弹性模量测试的研究  

Study on Elastic Modulus Measurement Using Hardness Tester

作　　者：官春平[1] 

机构地区：[1]广东轻工职业技术学院,广东广州510300

出　　处：《机床与液压》2018年第4期139-142,共4页Machine Tool & Hydraulics

摘　　要：弹性模量是材料性能的一项重要参数。采用Oliver-Pharr方法计算弹性模量容易受接触深度及初始卸载斜率的影响,尤其是材料呈现堆积状态时。采用量纲分析及有限元仿真,建立材料的弹性模量与压痕参数的解析表达式。数值反演和试验结果表明:提出的方法能获得较高精度的弹性模量,实现了弹性模量的高效测量,降低了试验成本。Elastic modulus is an important parameter of material properties. The effects of contact depth and initial unloading slope on the elastic modulus are larger when Oliver-Pharr method is used, especially when surface material piling up at the contact edge. Using dimensional analysis and finite element simulation, the analytical relationship of the elastic modulus and indentation pa- rameters was established. The results of the numerical reverse analysis and experiments show that using the proposed method, high precision elastic modulus can be obtained, the elastic modulus high efficiency measurement is achieved, and the testing cost is re- duced.

关 键 词：压痕 弹性模量 量纲分析 

分 类 号：TB938.2[一般工业技术—计量学]