The present contribution focuses on the analysis of diverse deformation mechanisms that impact the behaviour of PC/ABS blends using computational homogenisation. This includes analysing internal particle cavitation, PC/ABS interface debonding, and PC matrix shear-yielding. The goal is to investigate the optimal composition for specific applications and create tailored materials. The work involves establishing a microstructure Representative Volume Element, defining the constitutive description of both material phases, and explicitly modelling PC/ABS interfaces and matrix damage to achieve accurate predictions. A Python programme is devised to efficiently integrate zero-thickness cohesive interface elements around ABS particles, incorporating the PPR potential-based cohesive model to characterise the interface. Additionally, the finite strain visco-elastic visco-plastic constitutive model of the PC matrix is extended to incorporate a damage variable, addressing the shear-yielding failure mechanism. The PC/ABS blend’s thermomechanical response is homogenised using first-order hierarchical multi-scale analyses. The impact of considering the interface phase in the microstructure is assessed through various numerical analyses. The synergy between the constitutive models effectively captures the blend’s behaviour. These findings lay the foundation for broader applicability beyond PC/ABS blends, paving the way for future studies in the field.

目前的贡献重点是使用计算均质化来分析影响 PC/ABS 共混物行为的各种变形机制。这包括分析内部颗粒空化、PC/ABS 界面脱粘和 PC 基体剪切屈服。目标是研究特定应用的最佳成分并创造定制材料。这项工作包括建立微观结构代表性体积元素、定义两种材料相的本构描述，以及对 PC/ABS 界面和基体损伤进行显式建模以实现准确的预测。Python 程序旨在有效地集成 ABS 颗粒周围的零厚度粘性界面元素，并结合基于 PPR 势的粘性模型来表征界面。此外，PC 矩阵的有限应变粘弹性粘塑性本构模型经过扩展，纳入了损伤变量，解决了剪切屈服失效机制。使用一阶分层多尺度分析使 PC/ABS 共混物的热机械响应均匀化。通过各种数值分析来评估考虑微观结构中界面相的影响。本构模型之间的协同作用有效地捕捉了混合物的行为。这些发现为 PC/ABS 共混物之外的更广泛应用奠定了基础，为该领域的未来研究铺平了道路。