FORMULATION OF CONSTITUTIVE EQUATION OF FRICTION BASED ON CONCEPT OF SUBLADING SURFACE

基于底面概念的摩擦本构方程的建立

基本信息

批准号：
17560446
负责人：
HASHIGUCHI Koichi
金额：
$ 2.11万
依托单位：
KYUSHU UNIVERCITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2005
资助国家：
日本
起止时间：
2005 至 2006
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-17560446/
关键词：
Friction Static friction Kinetic friction Time-dependence Subloading surface Elastoplasticity Viscoplasticity Hardening softening

项目摘要

Description of the friction phenomenon as a constitutive equation has been attained first as a rigid-plasticity. Further, it has been extended to an elastoplasticity However, the interior of the sliding-yield surface has been assumed to be an elastic domain and thus the plastic-sliding velocity due to the rate of traction inside the sliding-yield surface is not described. Therefore, the accumulation of plastic-sliding due to the cyclic loading of contact traction cannot be described by these models. On the other hand, the first author of the present article has proposed the subloading surface model which is capable of describing the plastic strain rate by the rate of stress inside the yield surface. Further, the authors proposed the subloading-friction model which describes the smooth transition from the elastic-to plastic-sliding state by incorporating the concept of subloading surface.It is widely known that when bodies at rest begin to slide to each other, a high friction coefficient appears first, which is called the static-friction, and then it decreases approaching a stationary value, called the kinetic-friction. Further, it has been found that if the sliding ceases for a while and then it starts again, the friction coefficient recovers and the identical behavior as that in the initial sliding is reproduced.In this research, the subloading-friction model was extended so as to describe the decrease of friction coefficient from the static-to kinetic-friction by the isotropic softening due to the plastic-sliding and the recovery of friction coefficient by the isotropic hardening due to the creep deformations of surface asperities under the contact pressure. The qualitative property of the present model is examined by numerical experiments and the validity for prediction of friction behavior of real materials is verified comparing with test data for the linear sliding phenomenon.

将摩擦现象作为本构方程的描述首先是作为刚性塑性的。此外，它已扩展到弹性性，但是，已假定滑动润滑表面的内部是弹性域，因此未描述由于滑动饲养表面内部的牵引力速率而导致的塑料滑动速度。因此，这些模型无法描述由于接触牵引的环状载荷引起的塑料滑动的积累。另一方面，本文的第一作者提出了跨加载表面模型，该模型能够通过屈服表面内的应力速率来描述塑性应变速率。此外，作者提出了升华的摩擦模型，该模型通过结合了升华的表面概念来描述从弹性到塑料滑动状态的平稳过渡。当静止的身体开始彼此滑动时，首先出现高摩擦系数时，就会出现高摩擦系数，然后被称为静态 - 静态，然后将其降低了kinction nation the kin kintar nation kin kintrictial factriction the kintrict factriction。此外，已经发现，如果滑动停止了一段时间，然后再次开始，则摩擦系数恢复和相同的行为，并且在初始滑动中的相同行为将被复制。在这项研究中，将扩大均匀的摩擦模型，以描述从静态的动力学柔软的静电效率上恢复的摩擦系数的下降，从而描述了均匀的摩擦系数，从而使均匀的柔软效率恢复了均匀的柔软效率，使均匀的柔软效率恢复了均匀的柔软性，使得均匀的柔软性易变且摩擦型模型的摩擦效率减少。由于在接触压力下表面浅层的蠕变变形引起的各向同性硬化。通过数值实验检查了本模型的定性特性，并且与线性滑动现象的测试数据进行比较，对真实材料的摩擦行为进行预测的有效性进行了验证。