Integration of shape memory alloy wires into fiber-reinforced thermoplastic-based metal/plastic laminates for multifunctional lightweight structures - "Smart Hybrid Laminates"

该项目的目的是研究一种基于分层化合物的轻质建筑材料，该化合物由轻金属层、纤维增强热塑性层和形状记忆合金(SMA)的集成导线组成。这些“智能混杂层压板”(SHL)的生产是通过热成型工艺进行的，申请人已经对此进行了基础研究，并允许在复合材料制造中实现良好的可伸缩性和组件成型。目标集成功能将通过由NiTi制成的SMA线材的商业变种来实现。由于相变和明显的应力-应变滞后，SMA分别提供了感觉功能和高能量吸收。这使得SMA有资格集成到轻量级结构中。除了感官功能的实现外，该项目中的科学问题主要集中在结构材料中功能元素的适当、特定于工艺的集成。根据铺层结构的不同，SHL在传感器功能、热机械性能和无损评估的适用性方面进行了表征。研究结果为将SMA组分集成到热塑性多材料结构中提供了科学依据。

The aim of the project is to research a lightweight construction material based on a layered compound consisting of light metal layers, fiber-reinforced thermoplastic layers and integrated wires of a shape memory alloy (SMA). The production of these "Smart Hybrid Laminates" (SHL) takes place through a thermoforming process, which was already being fundamentally researched by the applicants and allows for a good scalability and molding of components in composite fabrication. The targeted integrated functionalities are to be realized with commercially available variants of SMA wires made out of NiTi. SMA offer sensory functions as well as high energy absorption as a result of the phase transformation and pronounced stress-strain hysteresis, respectively. This qualifies the SMA for integration into lightweight structures. In addition to the implementation of sensory functions, the scientific questions in the project essentially focus on a suitable, process-specific integration of the functional elements in the structural materials. In dependence of the layup structure, the SHL are characterized in terms of sensor functionality, thermo-mechanical properties and applicability of non-destructive evaluation. The results offer a scientific basis for the integration of SMA-components into thermoplastic multi-material structures.