Modelling and simulation of the manufacture-dependent shrinkage behaviour of glass-fibrereinforced 36epoxy resins for the improved prediction of surface-waviness and warpage

对玻璃纤维增​​强 36 环氧树脂的制造相关收缩行为进行建模和仿真，以改进对表面波纹度和翘曲的预测

• 批准号: 415849481
• 负责人: Professor Dr.-Ing. Maik Gude
• 金额: --
• 依托单位: Institut für Kunststoffverarbeitung (IKV) in Industrie und Handwerk an der RWTH Aachen
• 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 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/415849481?language=en
• 关键词: Modelling; simulation; manufacture; dependent; shrinkage

The aim of the collaborative project is to gain an improved understanding of the processdependent shrinkage induced volumetric change during processing of thermoset fibre reinforced plastics (FRP). It is known that the specific choice of process parameters has direct influence on the quality of the component and in particular on process induced deformations and surface waviness. However, the influence of the processing pressure on the resin cure behaviour has so far not been the subject of systematic process-related investigations. Within the framework of the project, novel test methods are being developed and used for the analysis of the thermo- and chemo-mechanical phenomena in laboratory scale. Especially the relationships between the process parameters temperature and pressure as well as the relevant phenomena resin reaction, shrinkage and interface formation between fibre and matrix are examined using an online sensor system. In this way, essential aspects, which until now have been neglected in the prediction of residual stresses, can be identified. Based on the experimental findings, parameterised material models are developed that form the basis for a multi-scale simulation approach. This is simultaneously developed by the project partners both for the numerical prediction of the residual stress state inside the composite materialas well as for the computation of the resulting surface waviness. The phenomena occurring within the material and at its surface are to be linked causally to one another for the first time in order to achieve a continuous modelling strategy. The fundamental investigation of the physical matrix properties under real curing conditions and the development of a multi-scale simulation of residual stresses and surface effects can increase the predictability of current simulation methods and substantially increase the process and material understanding of thermoset FRP.

协作项目的目的是对在热固性纤维增强塑料（FRP）处理过程中对过程依赖性收缩诱导的体积变化有了深入的了解。众所周知，过程参数的特定选择直接影响组件的质量，尤其是过程诱导的变形和表面波动。但是，迄今为止，加工压力对树脂疗法行为的影响并不是系统过程相关研究的主题。在项目的框架内，正在开发新的测试方法，并用于分析实验室量表中的热和化学机械现象。特别是使用在线传感器系统检查过程参数温度和压力之间的关系，以及相关现象树脂反应，纤维和基质之间的收缩和界面形成。通过这种方式，可以识别出在预测残余应力中忽略的基本方面。根据实验发现，开发了参数化的材料模型，构成了多尺度仿真方法的基础。这是由项目合作伙伴同时开发的，这既是用于对复合材料内部残留应力状态的数值预测，又是为了计算所得的表面波动。为了实现连续的建模策略，要在材料及其表面内发生的现象将首次与彼此联系起来。在实际固化条件下对物理基质特性的基本研究以及对残余应力和表面效应的多尺度模拟的发展可以提高当前模拟方法的可预测性，并大大增加对Thermoset FRP的过程和物质理解。