Tailored metal-polymer-metal layered composites for improved energy absorption characteristics of crash structures

定制的金属-聚合物-金属层状复合材料可改善碰撞结构的能量吸收特性

• 批准号: 523138878
• 负责人: Professor Dr.-Ing. Johannes Buhl, since 10/2023
• 金额: --
• 依托单位: Institut für Leichtbau und Kunststofftechnik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/523138878?language=en
• 关键词: Tailored; metal; polymer; layered; composites

The deformation and failure behaviour of crash-relevant structural components made of metal-polymer-metal (MPM) layered composites is strongly dependent of the strain rate-dependent material behaviour of the individual layers and the adhesion behaviour between the layers under highly dynamic loads. In the DFG project "Tailor-made metal-polymer-metal layered composites for improved energy absorption characteristics of crash structures", a strategy for consistent modeling and calculation of hybrid crash boxes made of MPM layer composites was developed and successfully applied. It was shown qualitatively that the adhesion behaviour is essential for the structural one and the resulting energy absorption capacity and can be further increased by a targeted and local adjustment. For this purpose, methods and design guidelines have to be developed that enable an efficient setting of load-related MPM layer composite properties for crash-loaded structural components. In addition, the influence of suitable joining concepts, strain hardening caused by the forming process and induced residual stresses on the crash behaviour of MPM structures has not yet been sufficiently investigated. Based on the established cross-scale modeling and characterization strategy for MPM layer composites, the project foreseen will finally predict the crash behaviour of locally configurable MPM layer composites by considering the forming and joining processes. Based on this, procedures for setting tailor-made energy absorption characteristics will be developed. On the one hand, the structural energy absorption should be increased and, on the other hand, the deformation behaviour should be specifically influenced by means of local failure mechanisms.

由金属-聚合物-金属（MPM）层状复合材料制成的与碰撞相关的结构部件的变形和失效行为强烈地依赖于各个层的应变率相关的材料行为以及在高动态载荷下层之间的粘附行为。在DFG项目“用于改善碰撞结构能量吸收特性的定制金属-聚合物-金属层状复合材料”中，开发并成功应用了MPM层状复合材料制成的混合碰撞盒的一致建模和计算策略。定性地表明，粘附行为对于结构和由此产生的能量吸收能力是必不可少的，并且可以通过有针对性的局部调整来进一步增加。为此，必须制定方法和设计准则，以便有效地设置碰撞加载结构部件的与载荷相关的MPM层复合材料特性。此外，合适的连接概念的影响，由成形过程引起的应变硬化和诱导的残余应力对MPM结构的碰撞行为尚未得到充分的研究。基于已建立的MPM层复合材料跨尺度建模和表征策略，该项目预计最终将通过考虑成型和连接过程来预测局部可配置MPM层复合材料的碰撞行为。在此基础上，将开发用于设置量身定制的能量吸收特性的程序。一方面，结构的能量吸收应该增加，另一方面，变形行为应该通过局部失效机制来具体影响。