The European Physical Journal E ( IF 1.8 ) Pub Date : 2020-09-22 , DOI: 10.1140/epje/i2020-11982-7 H Huang 1 , A Dasgupta 1 , N Singh 2
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Abstract.
Modeling the deformation of structures containing pressure-sensitive adhesive (PSA) joints can be a challenging task because of the dependence of the deformation mechanism on a) PSA adhesive properties and b) the bonding substrate's surface properties, such as surface energy and surface roughness. These parameters have significant and unique effects on the mechanical response of the joint. This paper is part of a two-part series, where a mechanism-based predictive modeling approach, supported by empirical observations, is presented for modeling the uniaxial tensile mechanical behavior of single-layered PSA joints based on acrylic PSA materials. This paper (Part I) addresses the stress-strain response, while Part II of this series will address the creep behavior. The underlying model is based on multiple mechanisms: i) cavity nucleation and growth in the bulk adhesive material of the PSA system, as well as at the interfaces between the PSA and the substrate; ii) fibrillation of the cavitated adhesive layer and iii) interfacial slippage between the adhesive and the bonding substrate; iv) PSA delamination from the substrate. This predictive model can be used as a virtual testing tool to generate stress-strain curves for constitutive models of PSA joints under different tensile loading conditions.
Graphical abstract
中文翻译：
单层压敏胶粘剂（PSA）接头的预测机制模型：第一部分：单轴拉伸应力-应变响应。
摘要。
建模包含压敏粘合剂（PSA）接头的结构的变形可能是一项艰巨的任务，因为变形机理取决于a）PSA粘合剂性能和b）粘合基材的表面性能，例如表面能和表面粗糙度。这些参数对关节的机械响应具有重大而独特的影响。本文是一个由两部分组成的系列文章的一部分，在该系列文章中，提出了一种基于机理的预测建模方法，并以经验观察为基础，对基于丙烯酸PSA材料的单层PSA接头的单轴拉伸力学行为进行建模。本文（第一部分）讨论了应力-应变响应，而本系列的第二部分将讨论蠕变行为。基础模型基于多种机制：i）PSA系统的块状粘合剂材料中以及PSA与基材之间的界面处的空腔成核和生长；ii）空化的粘合剂层的原纤化和iii）粘合剂和粘合基材之间的界面滑动；iv）PSA从基材上分层。该预测模型可以用作虚拟测试工具，以生成不同拉伸载荷条件下PSA接头本构模型的应力-应变曲线。
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