Fracture mechanics of ternary polymer blends: multiscale modeling accounting for processing induced morphologies

三元聚合物共混物的断裂力学：考虑加工诱导形态的多尺度建模

• 批准号: 203024772
• 负责人: Professor Dr.-Ing. Thomas Seelig
• 金额: --
• 依托单位: Institut für Mechanik (IFM)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2011
• 资助国家: 德国
• 起止时间: 2010-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/203024772?language=en
• 关键词: Fracture; mechanics; ternary; polymer; blends

Mixtures (blends) of polycarbonate (PC) and acrylonitrile-butadiene-styrene (ABS) are a class of thermoplastic polymers widespread in technical applications. They feature a complex microstructure which in conjunction with microscale damage mechanisms strongly affects the macroscopic fracture behavior. While numerous experimental studies exist in the literature, the interrelation between microstructure and fracture behavior of PC/ABS blends is in the present project for the first time analyzed systematically from multiscale continuum mechanical models and numerical simulations. In the first period, valuable experience could already be gained from idealized models (e.g. periodic microstructures) and loading conditions (quasistatic, isothermal). Based on these findings, the second period will focus on more realistic (e.g. random, morphology) representations of the microstructure as well as the effects of high loading rates and adiabatic heating in the fracture process zone. Overall targets thereby are a deeper insight into the microstructure-property-relationships of PC/ABS blends and the development of reliable constitutive models to be used on the macroscopic length scale.

聚碳酸酯(PC)和丙烯腈-丁二烯-苯乙烯(ABS)的混合物(共混物)是一类广泛应用于技术领域的热塑性聚合物。它们具有复杂的微观结构，与微观损伤机制结合在一起，强烈影响宏观断裂行为。在大量实验研究的基础上，本课题首次从多尺度连续介质力学模型和数值模拟两个方面系统地分析了PC/ABS共混物的微观结构与断裂行为之间的相互关系。在第一阶段，可以从理想化的模型(如周期性微结构)和加载条件(准静态、等温)中获得宝贵的经验。基于这些发现，第二阶段将侧重于微观结构的更真实的(例如，随机的、形态的)表示，以及高加载速率和断裂过程区域的绝热加热的影响。因此，总体目标是更深入地了解PC/ABS共混物的微观结构-性能-关系，以及开发用于宏观长度尺度的可靠本构模型。