Damage of fibre reinforced plastics caused by the inner multiaxial stress state owing to thermal, hygrothermal and multiaxial mechanical loads

热、湿热和多轴机械载荷引起的内部多轴应力状态引起的纤维增强塑料的损坏

• 批准号: 263275411
• 负责人: Professor Dr.-Ing. Peter Horst
• 金额: --
• 依托单位: Bundesanstalt für Materialforschung und -prüfung (BAM)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2014
• 资助国家: 德国
• 起止时间: 2013-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/263275411?language=en
• 关键词: Damage; fibre; reinforced; plastics; caused

It is a general hypothesis of this research proposal that the fatigue behavior of fibre reinforced plastics (FRP) is exclusively influenced by local stresses within the individual layers of the composite. Although these local stresses may have different causes, such as mechanical loads or a change in temperature and humidity, the effect - fatigue - still is comparable. It is therefore assumed, that the cause of local stresses does not influence their effect. The project is to investigate the behavior of FRPs exposed to mechanical, thermal and hygrothermal loads. In accordance with the research hypothesis an extensive and well-tuned experimental program shall be conducted. All experiments focus on understanding gradual damaging of FRPs, which will be resolved on a microscale using adequate measuring systems. Different inner local stress states are reproduced by specific control and combination of outer loads (multiaxially mechanical, thermal, hygrothermal) and by the use of various laminates, which differ in stacking sequence and layer thickness. All laminates are strictly divided in layers of interest and purely supporting layers. Complementary to the experiments, analytical and numerical calculations will determine stress redistribution within the material. Due to the project s extent two collaborating institutes are mandatory.

这是一个普遍的假设，纤维增强塑料（FRP）的疲劳行为是专门的复合材料的各个层内的局部应力的影响。虽然这些局部应力可能有不同的原因，如机械载荷或温度和湿度的变化，但疲劳的影响仍然是可比的。因此，可以假定局部应力的原因并不影响它们的效果。该项目是调查的行为玻璃钢暴露于机械，热和湿热负荷。根据研究假设，应进行广泛和精心调整的实验计划。所有的实验都集中在了解玻璃钢的逐渐损坏，这将是解决在微观尺度上使用适当的测量系统。不同的内部局部应力状态通过特定的控制和外部载荷（多轴机械载荷、热载荷、湿热载荷）的组合以及通过使用在堆叠顺序和层厚度方面不同的各种层压板来再现。所有的层压板都严格地分为感兴趣的层和纯粹的支撑层。作为实验的补充，分析和数值计算将确定材料内的应力再分布。由于该项目的范围，两个合作机构是强制性的。