Design of force introduction onserts for thin-walled fibre-polymer-composites

薄壁纤维聚合物复合材料的力引入装置设计

• 批准号: 275176947
• 负责人: Professor Dr.-Ing. Helmut Schürmann
• 金额: --
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2015
• 资助国家: 德国
• 起止时间: 2014-12-31 至 2020-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/275176947?language=en
• 关键词: Design; force; introduction; onserts; thin

Load introduction in fiber-polymer-composites still remains a big challenge for composite designers. Mostly lightweight optimized structures are highly loaded; an additional problem is that composites always are applicated to thin structures, predominantly two-dimensional structures, such as sheets and shells. Load applications, in particular in the third dimension, often pose a special problem, since in this direction only the much weaker transverse tensile strength of the laminate is available. Since the strength in this direction is less than the longitudinal properties used in FRP, force introduction points have to be considered much more deeply.At the institute of Konstruktiver Leichtbau und Bauweisen a wide range of force introduction methods have been developed and tested. This includes the problem of the point loading on thin laminates. However, previous studies were limited mainly to metallic studs that were integrally embedded in the laminate. The design method worked out can directly be used by design engineers.However the material combination of FRP - metal represents an unfavorable material combination. Therefore, within the framework of this research project the application of force introduction shall be implemented in a FRP design.From that three main research tasks arise: the connection of the force introduction element to the basic structure, the integration of a thread and the optimal integration of a function like a universal joint.The overall objective is to give to the composite engineers design recommendations and the necessary reliable data in order to reach a lightweight optimum with maximum transmittable forces.

对于复合设计师来说，纤维聚合物 - 复合材料中的负载介绍仍然是一个巨大的挑战。大多数轻巧的优化结构高度负载；另一个问题是，复合材料始终适用于薄结构，主要是二维结构，例如床单和壳。负载应用，特别是在第三维中，通常会带来一个特殊的问题，因为在这个方向上，只有层压板的较弱的横向拉伸强度可用。由于该方向的强度小于FRP中使用的纵向特性，因此必须更深入地将力介绍点视为。这包括薄层压板上的点加载问题。但是，以前的研究主要限于层压板中积分的金属螺柱。设计工程师可以直接使用设计的设计方法。但是，金属的材料组合如何代表不利的材料组合。因此，在本研究项目的框架内，应在FRP设计中实施力介绍的应用。从三个主要研究任务出现：力介绍元素与基本结构的联系，线程的整合以及函数的最佳整合（如通用关节）。总体目标是为复合工程师的设计提供了建议，并最大程度地延伸了可靠的数据。