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Indentation Contact Mechanics Applied to Characterizing and Analyzing The Mechanical Properties of Engineering Materials

压痕接触力学应用于表征和分析工程材料的力学性能

基本信息

批准号：
12305043
负责人：
SAKAI Mototsugu
金额：
$ 19.63万
依托单位：
Toyohashi University of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2002
项目状态：
已结题

项目摘要

Indentation contact mechanics has intensively as well as extensively been applied to characterizing and analyzing the mechanical properties of metals, ceramics, and polymers. These mechanical properties include elasticity, plasticity, elastoplasticity, viscosity, viscoelasticity, and superplasticity. The major results of the project are outlined, as follows :(a) Elastoplastic contact mechanics(a1) Elastoplastic constitutive equations for pyramidal/conical indenters were theoretically derived, and experimentally scrutinized.(a2) "True Hardness" as a measure for plasticity was theoretically proposed and experimentally confirmed as an efficient micro/nano-parameter for representing "plasticity".(a3) Test methods and test instrumentations were well-developed for elastoplastic characterization of engineering materials.(b) Viscoelastic contact mechanics(b1) Theoretical framework of time-dependent viscoelastic contact mechanics was constructed.(b2) Viscoelastic constitutive equations for spherical/pyramidal/conical indenters were theoretically derived, and experimentally scrutinized.(b3) Viscoelastic indentation test systems operating in the range from room temperature to elevated temperatures to 1200℃ were developed, and then applied to characterizing the viscoelastic parameters and rheological functions of various engineering materials.(c) Superplastic contact mechanics(c1) A model of "cooperative grain-boundary sliding" was theoretically developed for describing the superplastic deformation and flow of fine-grain-size ceramics.(c2) Indentation contact mechanics was applied to experimentally examine the validity of the model.

压痕接触力学已广泛应用于表征和分析金属、陶瓷和聚合物的机械性能。这些机械性能包括弹性、塑性、弹塑性、粘度、粘弹性和超塑性。该项目的主要成果概述如下：（a）弹塑性接触力学（a1）从理论上推导了金字塔/圆锥形压头的弹塑性本构方程，并进行了实验验证。（a2）从理论上提出了“真实硬度”作为塑性的度量，并通过实验证实了它是一种有效的微/纳米参数来表示 (a3) 已开发出用于工程材料弹塑性表征的测试方法和测试仪器。(b) 粘弹性接触力学(b1) 构建了随时间变化的粘弹性接触力学的理论框架。(b2) 从理论上推导了球形/锥体/圆锥形压头的粘弹性本构方程，并进行了实验 (b3) 开发了从室温到高温至1200℃的粘弹性压痕测试系统，然后应用于表征各种工程材料的粘弹性参数和流变功能。(c) 超塑性接触力学(c1) 从理论上建立了“协同晶界滑动”模型，用于描述细晶粒的超塑性变形和流动 (c2)应用压痕接触力学通过实验检验模型的有效性。