GRK 2078: Integrated engineering of continuous-discontinuous long fiber reinforced polymer structures

在第一期资助期内，薄膜成型复合材料（SMC）作为局部连续纤维增强的不连续长纤维增强聚合物结构（CoDiCoFRP）的重要代表，由IRTG的博士研究人员进行了系统的分析。这种复合类型对于大批量的组件非常重要。通过KIT的博士研究人员和加拿大的合作伙伴以及博士后项目的虚拟过程链建模的密切互动，已经建立了一个集成的和实验验证的概念，用于制造，建模和连续增强聚合物结构组合的尺寸。设计、制造并分析了基于SMC的样机。在第二个资助期，主要重点将再次放在SMC上，但除此之外，也在长纤维增强热塑性塑料（LFT）上。为SMC开发的方法将应用于更复杂的SMC演示器几何。因此，a)综合工程将通过进一步开发不同项目和方法之间的接口得到改进；b)控制材料和结构行为的物理机制和几何微观结构将得到更好的理解，以便在所有研究领域建立可靠的方法。第二代将在选定的项目和子项目中开始对LFT进行研究，以确保第三代博士将有足够的数据量和成熟的方法来充分关注LFT，这对于大批量的轻量化结构也是至关重要的。第三代将受益于两代的研究，并将有条不紊地研究LFT。第三代的主要目标是连续-不连续长纤维增强热塑性塑料的一体化工程。系统地，更复杂的物理行为的基质，纤维的不同排列和由此产生的不同的基质纤维相互作用将是在不同的研究领域的重点。由于改进了制造工艺和结构部件的设计，这种方法的转移确保了LFT在轻量化结构中的潜力可以得到利用。

In the first funding period, Sheet Molding Compound (SMC) composites, being important representatives of discontinuous long fiber reinforced polymer structures with local continuous fiber reinforcements (CoDiCoFRP), have been systematically analyzed by the doctoral researchers of IRTG. This composite type is of importance for components with large lot sizes. By an intensive interaction of the doctoral researchers at KIT and the cooperation partners in Canada as well as with the PostDoc project for virtual process chain modeling, a first systematic step towards an integrated and experimentally proven concept for the manufacturing, modeling and dimensioning of combinations of discontinuously and continuously reinforced polymer structures has been established. An SMC based demonstrator has been designed, manufactured and analyzed. In the second funding period, the main focus will again lie on SMC but, additionally, also on long fiber reinforced thermoplastics (LFT). The methods developed for SMC will be applied for a more complex SMC demonstrator geometry. Thereby, a) the integrated engineering will be improved by further developing the interfaces between the different projects and methods and b) the physical mechanisms and geometrical microstructures governing the material and structural behavior will be better understood in order to establish robust methods in all research areas. The second generation will begin - in selected projects and subprojects - with research on LFT in order to ensure that the third doctoral generation will have a sufficient amount of data and mature methods to fully focus on LFT, which is also of crucial importance for leightweight structures with large lot sizes. The third generation will benefit from the research of two generations and will methodically work on LFT. The main objective of the third generation is the integrated engineering of continuous-discontinuous long fiber reinforced thermoplastics. Methodically, the more complex physical behavior of the matrix, the different arrangement of fibers and the resulting different matrix fiber interaction will be in the focus within the different research areas. This transfer of methods ensures that the potential of LFT for leightweight structures can be used due to the improved design of the manufacturing processes and structural components.