Designed metal-polymer-metal sandwich structures for improved energy absorption characteristics of crash structures

设计金属-聚合物-金属夹层结构，以改善碰撞结构的能量吸收特性

• 批准号: 407352905
• 负责人: Professor Dr.-Ing. Maik Gude
• 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
• 财政年份: 2018
• 资助国家: 德国
• 起止时间: 2017-12-31 至 2021-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/407352905?language=en
• 关键词: Designed; metal; polymer; sandwich; structures

Currently, developing robust modelling and calculation methods describing the deformation and failure behaviour of structural components made of multi-layered hybrid materials subjected to crash loading conditions is still a major challenge. In the case of metal-polymer-metal (MPM) layered composites, this difficulty is primarily attributed to the time-dependent mechanical behaviour of the polymeric core and the metallic cover layers as well as the unexpected behaviour of the metal/polymer interface under such highly dynamic loading conditions. In addition, the relevant properties used for the material model are significantly affected by the manufacturing process conditions.The current project aims at developing predictive modelling approaches of the crash behaviour of variably configurable MPM layered composites. In this regard, reliable methodologies aiming at the adjustment of tailored energy absorption characteristics will be developed. On the one hand, an increase of the structural energy absorption is targeted, and on the other hand the deformation behaviour will be selectively adjusted by means of local failure mechanisms. For this purpose, methods and design guidelines are to be established enabling an efficient adjustment of adequate and locally-variable MPM layered composites properties in combination with adapted process routines for crash-loaded structural components. Moreover, multi-scale modelling and characterisation strategies considering the processing history will be applied. In this regard, experimental investigations under different loading rates and conditions are foreseen to establish the material model.

目前，发展描述由多层混杂材料制成的结构部件在碰撞载荷条件下的变形和破坏行为的稳健建模和计算方法仍然是一个主要挑战。在金属-聚合物-金属(MPM)层状复合材料的情况下，这一困难主要归因于聚合物核心和金属覆盖层的随时间变化的力学行为以及金属/聚合物界面在这种高动态加载条件下的意外行为。此外，材料模型的相关性能受到制造工艺条件的显著影响。本项目旨在开发可变配置的MPM层状复合材料碰撞行为的预测建模方法。在这方面，将制定旨在调整量身定制的能量吸收特性的可靠方法。一方面以增加结构吸能为目标，另一方面通过局部破坏机制选择性地调整变形行为。为此，应建立方法和设计指南，以便能够有效地调整适当的和局部可变的MPM层状复合材料的性能，并结合适用于碰撞加载结构部件的工艺程序。此外，还将采用考虑加工历史的多尺度建模和表征策略。在这方面，预计将在不同加载速率和条件下进行试验研究，以建立材料模型。