The contact of plastic components and media in use is often unavoidable. In addition to the influence of the medium on the mechanical properties, the occurrence of environmental stress cracks (ESC) is one of the most frequent causes of failure of plastic components in use. A significant improvement in the durability of plastics under the influence of the medium using a fibre reinforcement was shown in preliminary tests. But so far, there have been no fundamental investigations in the literature on this topic. The presented investigations deal with the influence of media on the mechanical behaviour and the occurrence of stress cracks under consideration of fibre reinforcement and its orientation. Therefore, a new test bench as well as tensile tests under media influence accompanied by acoustic emission measurement were used. Various media in combination with polycarbonate and polystyrene were investigated. Furthermore, a multiscale simulation based on molecular dynamics simulation as well as process and structure simulation was developed and validated.

在使用中，塑料组件和介质的接触通常是不可避免的。除了介质对机械性能的影响外，环境应力裂纹（ESC）的出现也是使用中塑料部件失效的最常见原因之一。初步测试显示，在使用纤维增强材料的介质的影响下，塑料的耐用性有了显着提高。但是到目前为止，有关这一主题的文献还没有根本的研究。在考虑纤维增强及其取向的情况下，提出的研究解决了介质对机械性能和应力裂纹发生的影响。因此，使用了新的试验台以及在介质影响下进行声发射测量的拉伸试验。研究了与聚碳酸酯和聚苯乙烯结合的各种介质。此外，开发并验证了基于分子动力学模拟以及过程和结构模拟的多尺度模拟。