An internal variable theory of adhesion
An internal variable theory of adhesion
复制标题
粘附的内变量理论
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
J. Ganghoffer
中科院分区：
文献类型：
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作者：
E. Bitterlin;J. Ganghoffer
建立了描述粗糙实体间粘着的平面接触模型，其中粗糙集被描述为第三个薄体。由于局部压应力，空洞在压缩载荷过程中闭合，导致接触区域粘附性增加。基于不可逆过程的热力学，建立了描述两种固体间接触时粘着强度演化的内变量模型。利用摄动法建立了第三体的材料表面模型。然后对固体弹性体之间的平面接触的赫兹理论进行了修正，以解释当两个固体被压在一起时增加的附着力。分析了橡胶半球在玻璃板上压缩的具体问题。在这种情况下，分析模型以令人满意的方式预测了真实的接触面积与压力之间的关系。在论文的第二部分中，将该模型扩展到描述多个不同类型的对象。
A model describing the flat contact with adhesion between rough solid bodies has been set up, in which the set of asperities is described as a third thin body. Due to the local compressive stresses, the cavities close up during compressive loading, leading to increased adhesion in the contact area. An internal variable model describing the evolution of the intensity of adhesion in the contact between the two solids is set up, based on the thermodynamics of irreversible processes. From a perturbation method, a material surface model for the third body is derived. The Hertz theory of the plane contact between solid elastic bodies is then modified in order to account for the increased adhesion when both solids are pressed together. The specific problem of the compression of a rubber hemisphere on a glass plate is analysed. In that situation, the analytical model predicts in a satisfactory way the true area of contact vs. the compressive force. In the second part of the paper, the model is extended to describ...