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首页> 外文会议>3rd Contact Mechanics International Symposium Jun 17-21, 2001 Peniche, Portugal >ADHESION OF VISCOELASTIC SPHERICAL SOLIDS
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ADHESION OF VISCOELASTIC SPHERICAL SOLIDS

机译：粘弹性球形固体的粘附

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The development of micro-probe instruments, such as the Atomic Force Microscope, for the measurement of surface energy and other material properties on the microano scale has led to the need for continuum mechanics models of the contact of a spherically tipped probe with the surface of a specimen in the presence of adhesive forces. In the case where the tip and specimen are perfectly elastic solids, such models are well developed through the elastic fracture mechanics principle of equating the strain energy release rate to the work of adhesion. The process of increasing and decreasing the contact load is then fully reversible. When the specimen material is viscoelastic, e.g. polymer or rubber, the situation is complicated by viscoelastic dissipation. The apparent work of adhesion becomes rate dependent and irreversible: more energy is required to separate adhering surfaces than is returned when they come together, an effect known as 'adhesion hysteresis'. The paper will outline progress in extending the elastic analysis to the viscoelastic situation by modelling the material as a linear viscoelastic solid.
机译：诸如原子力显微镜之类的微探针仪器的开发，用于在微米/纳米尺度上测量表面能和其他材料特性，因此，需要使用连续的力学模型来模拟球形探针与球形探针的接触。粘附力作用下的试样表面。在尖端和试样为完全弹性固体的情况下，通过将应变能释放速率等同于粘附功的弹性断裂力学原理，可以很好地开发此类模型。然后，增加和减少接触负载的过程是完全可逆的。当样本材料是粘弹性的时，例如聚合物或橡胶，粘弹性耗散使情况复杂化。表观上的粘附作用取决于速率，并且不可逆：与粘附在一起的表面相比，分离粘附表面需要更多的能量，这种作用称为“粘附滞后”。本文将通过将材料建模为线性粘弹性固体，概述将弹性分析扩展到粘弹性情况的进展。

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