Characterization and modelling of the behaviour of advanced woven composite material

先进编织复合材料行为的表征和建模

• 批准号: RGPIN-2018-05537
• 负责人: Dano, MarieLaure
• 金额: $ 1.97万
• 依托单位: Université Laval
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=681785
• 关键词: Characterization; modelling; behaviour; advanced; woven

The current aerospace industry seeks and asks for new innovative materials to be used for primary aircraft components. Because of their structural performance and light weight, composite materials are now increasingly being used in primary aircraft structures. However, conventional laminated composites only have in-plane oriented fibers making them vulnerable to delamination against impact loads. Therefore, interest for using three-dimensional (3-D) woven composites for aircraft applications is rising. Indeed 3-D woven composites offer higher delamination resistance and damage tolerance because of yarns woven in the through-thickness-direction. However, to support their growing use and applications, a better knowledge of their mechanical properties and behaviour until rupture is required. ******The applicant's research group has recently begun conducting experimental and numerical studies on the mechanical behavior of a 3D interlock woven composite subjected to impact loading. A preliminary model based on a continuum damage mechanics (CDM) approach has been proposed. It uses three damage variables (in the weft, warp and in-plane shear directions) and take into account inelastic strains in the weft and in-plane shear directions. However, the model currently doesn't take into account coupling between the different damage variables and between the inelastic strains. The main objectives of the research proposal are therefore to improve the constitutive laws and develop reliable and robust numerical tools to predict the mechanical behaviour of 3D woven composites.******Laboratory experiments will be conducted to determine coupling effects. Improved damage evolution laws will be proposed as well as a new plasticity development law. Additional impact tests will be performed at different energy levels to validate the model. Next, a realistic representative unit cell will be modelled. A progressive damage will be implemented and the finite-element software Abaqus will be used to test virtually the 3D composite and predict its mechanical behaviour. The results of the virtual tests will allow determining theoretically the parameters and variables used in the constitutive equations, plasticity and damage laws of the macroscopic CDM model. Finally, fatigue tests will be conducted to gain a better understanding of fatigue induced damage and failure modes. ***The developed numerical tools will allow simulating the structure behavior as a function of the 3D-woven architecture used for the composite reinforcement. The simulations will allow to reduce design cycle and minimize the number of components to be tested. The research results will have the potential to lead to numerous applications in the automotive and aeronautical areas. ********

当前的航空航天行业寻求并要求将新的创新材料用于主要飞机组件。由于它们的结构性能和轻巧的重量，复合材料现在越来越多地用于主飞机结构中。但是，传统的层压复合材料仅具有面向面的纤维，使其容易受到影响负载的分层。因此，使用三维（3-D）编织复合材料进行飞机应用的兴趣正在上升。实际上，由于在整个方向上编织的纱线，3-D编织的复合材料具有更高的分层抗性和损伤耐受性。但是，为了支持他们不断增长的使用和应用，可以更好地了解其机械性能和行为，直到需要破裂为止。 *****申请人的研究小组最近开始对3D互锁编织复合材料的机械行为进行实验和数值研究。已经提出了基于连续损伤力学（CDM）方法的初步模型。 它使用三个损坏变量（在纬线，经线和平面剪切方向上），并考虑到纬纱和平面剪切方向上的非弹性应变。但是，该模型目前尚未考虑不同损伤变量和非弹性应变之间的耦合。因此，研究建议的主要目标是改善本构定律并开发可靠，可靠的数值工具来预测3D机织合材料的机械行为。******将进行实验室实验以确定耦合效应。将提出改善的损害进化法，以及新的可塑性发展法。其他影响测试将在不同的能级进行验证。接下来，将建模现实的代表性单元单元。将实施渐进式损害，并将使用有限元软件ABAQUS来测试3D复合材料并预测其机械行为。虚拟测试的结果将允许从理论上确定宏观CDM模型的本构方程，可塑性和损伤定律中使用的参数和变量。最后，将进行疲劳测试，以更好地了解疲劳引起的损害和故障模式。 ***开发的数值工具将允许模拟结构行为，这是用于复合加固的3D编织体系结构的函数。模拟将允许减少设计周期并最大程度地减少要测试的组件数量。研究结果将有可能导致在汽车和航空区域中进行众多应用。 ********