基于纳米压痕的线性黏弹材料模量的测试方法  

Measurement of Modulus of Linear Viscoelastic Materials by Nanoindentation

作　　者：胡宏玖[1] 李达开[1] 周沙溆[2] 李洁[3] 贺耀龙[1] 

机构地区：[1]上海市应用数学和力学研究所上海大学,200072 [2]吉首大学张家界学院,湖南张家界427000 [3]上海大学分析测试中心,上海200444

出　　处：《润滑与密封》2010年第5期26-30,共5页Lubrication Engineering

基　　金：国家自然科学基金资助项目(10672095)

摘　　要：据Lee-Radok积分算子,提出Berkovich针尖动态压入线性黏弹材料过程中,聚合物材料的存储模量和损耗模量的修正测试方法(IDNM),通过与聚甲基丙烯酸甲酯(PMMA)的纳米压痕动态力学试验结果及动态机械分析仪(DMA)的试验结果的对比,分析IDNM方法的主要影响因素。结果表明:以恒加载速率施加动态压入主载荷时,IDNM方法可获较高精度的存储模量,与DMA结果相差在10%以内,且IDNM方法并不局限于Lee-Radok条件。Improved dynamic nanoindentation method（IDNM） for Berkovich nanoindenter to measure the storage modulus and loss modulus of linear viscoelastic materials was proposed from Lee-Radok hereditary integral operator,and the main factors affecting IDNM were discussed in terms of dynamic mechanical analysis（DMA） and dynamic nanoindentation for polymethacrylate（PMMA）.The results show that the dynamic characteristics of viscoelastic materials are accurately obtained by IDNM with a constant rate loading,and the average percent error for the complex modulus of PMMA is less than 10%.Moreover,IDNM is also applicable under the condition that Lee-Radok approach is not justified.

关 键 词：模量 线黏弹性 纳米压痕 动态 

分 类 号：TG156[金属学及工艺—热处理]