Numerical Investigation of Interfacial Strength in Metal–Rubber Bonding Influenced by Substrate Surface Topography Using a Sine Wave Interface Model
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Abstract
This research investigates the interfacial strength between metal and rubber under the influence of surface topography by means of the finite element method. A two-dimensional representative volume element (RVE) model of the joint was developed in conjunction with a cohesive zone model (CZM) employing the traction–separation law (TSL) to simulate interfacial damage and failure. The surface roughness of the metal substrate was modeled using sinusoidal wave geometries to examine the effects of wave amplitude and wavelength on the surface profile. Additionally, the elastic modulus of the rubber was varied to evaluate its impact on overall interfacial strength. Results indicate that variations in metal surface roughness significantly affect interfacial adhesion when the elastic modulus of the rubber exceeds 50 MPa. Specifically, at a rubber elastic modulus of 1000 MPa, interfacial strength increased by 152% as wave height increased from 0.002 mm to 0.02 mm, and by approximately 325% as the wavelength decreased from 0.1 mm to 0.01 mm.
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