Faculty of Mechanical Engineering, Technion-Israel Institute of Technology, Haifa, Israel.
Bioinspir Biomim. 2020 Jun 8;15(4):046011. doi: 10.1088/1748-3190/ab8ba3.
A finite element model is developed to study the behaviour of adhesion-governed contact of soft elastic wall-shaped projections and a rigid flat under normal and tangential loading. Bi-linear cohesive zone material is implemented to model the adhesive interaction of the contact, and Tresca's law of friction is used to model the tangential response. An assessment of maximum tangential load capacity of attachment devices based on dry adhesive contact is performed using the described model and the effects of geometrical properties are investigated. The value of maximum shear stress in the contact of PVS and a silicon flat is identified. The model reveals that the tangential load capacity of the wall-shaped projection is independent of normal load, and that increasing the length of the adhesive flap, as well as decreasing its thickness provides better tangential load capacity.
建立了一个有限元模型，以研究软弹性壁状突出物与刚性平板在法向和切向载荷作用下的粘着接触行为。采用双线性内聚区材料来模拟接触的粘弹性相互作用，并用 Tresca 摩擦定律来模拟切向响应。使用所描述的模型评估基于干粘接触的附着装置的最大切向承载能力，并研究了几何特性的影响。确定了 PVS 与硅片平面接触处的最大剪切应力值。该模型表明，壁状突出物的切向承载能力与法向载荷无关，增加胶瓣的长度和减小其厚度可以提供更好的切向承载能力。
