软材料的接触力学及应用

本项目的研究将主要集中于软材料的无摩擦和滑动/旋转摩擦接触力学问题。主要内容包括：(1)通过考虑软材料的非线性本构、大变形等因素的影响，建立软材料的接触力学模型；(2)软材料二维无摩擦和滑动摩擦接触的理论分析和数值模拟，考虑几类典型压头的作用、不同接触情况（如软硬接触、软软接触、冷热接触、粗糙接触等）以及“理想接触”和“非理想接触”条件；(3)软材料轴对称无摩擦和旋转摩擦接触的理论分析和数值模拟；(4)进一步开展软材料的纳米压痕实验，验证理论和数值结果的有效性究。主要目的是：系统地研究软材料的接触力学行为，探讨外加载荷、温度、材料模量、摩擦系数、表面粗糙度对接触压力、接触区面积、压痕等的影响规律，为软体机器和器件的安全和可靠性设计提供的理论依据。

This project will study the frictionless and sliding/rotating frictional contact of soft materials. The main contents include: (1) Establish the contact model of soft materials with consideration of the nonlinear constitutive relation, large deformation, etc. (2) Theoretical and numerical analysis of 2D frictionless and sliding frictional contact of soft materials. The effect of some typical punches, different contact types (such as soft/hard contact, soft/soft contact, cool/warm contact and rough contact) and perfect/imperfect contact conditions are taken into account. (3) Theoretical and numerical analysis of axisymmetric frictionless and rotating frictional contact of soft materials. (4) Perform the nano-indentation test of the soft materials, and validate the theoretical and numerical results. The aim of this project is to give a comprehensive study on the contact behavior of soft materials. The effect of the applied load, temperature, material modulus, friction coefficient and roughness on the contact pressure, contact area and indentation will be discussed. The results are important for the safety and reliability design of the soft machines and devices.