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Elasto-plastic analysis of the single cantilever beam adhesion test

机译:单悬臂梁附着力试验的弹塑性分析

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摘要

Double cantilever beam and associated tests are much used to characterise structurally bonded systems. Use of these, usually, implicitly assumes that the bulk adherends remain elastic during separation (neglecting local effects at the crack front). However, in many pragmatic situations, strength of adhesion is required for systems in which (at least) one adherend becomes partially plastic during fracture, either due to low elastic limit or thinness of the substrate {e.g. the 'climbing drum' test). We present here a single cantilever beam test, in which only one adherend is sufficiently flexible to bend appreciably under load. In particular, we consider behaviour of the system when the applied bending moment is sufficiently great to induce elasto-plastic behaviour in the said adherend. Tests performed on a model aluminium/epoxy system have been monitored using optical and mechanical techniques. The situation has been analysed assuming ideal elasto-plastic behaviour of the substrate.
机译:双悬臂梁和相关测试常用于表征结构粘结系统。通常,使用这些方法隐含地假定散装被粘物在分离过程中保持弹性(忽略了裂纹前沿的局部影响)。然而,在许多实用的情况下,由于低弹性极限或基底的薄度(例如,基片的厚度),在断裂期间(至少)一个被粘物变成部分可塑性的系统需要粘合强度。 “攀爬鼓”测试)。我们在这里提出了一个悬臂梁测试,其中只有一个被粘物具有足够的柔韧性,可以在负载下明显弯曲。特别地,当施加的弯矩足够大以致于在所述被粘物中引起弹塑性行为时,我们考虑系统的行为。已使用光学和机械技术监测了在模型铝/环氧树脂系统上进行的测试。假设基材具有理想的弹塑性行为,对这种情况进行了分析。

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