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: $ 3.93万
• 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: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=754426
• 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.

当前的航空航天工业寻求并要求用于主要飞机部件的新型创新材料。由于其结构性能好且重量轻，复合材料现在越来越多地用于主要飞机结构。然而，传统的层压复合材料仅具有面内取向的纤维，这使得它们在冲击载荷下容易分层。因此，人们对在飞机应用中使用三维 (3-D) 编织复合材料的兴趣正在上升。事实上，由于纱线沿厚度方向编织，3D 编织复合材料具有更高的抗分层性和损伤容限。然而，为了支持它们不断增长的使用和应用，需要更好地了解它们在破裂之前的机械性能和行为。申请人的研究小组最近开始对 3D 联锁编织复合材料在冲击载荷作用下的机械行为进行实验和数值研究。提出了基于连续损伤力学（CDM）方法的初步模型。 它使用三个损伤变量（纬向、经向和面内剪切方向）并考虑纬向和面内剪切方向的非弹性应变。然而，该模型目前没有考虑不同损伤变量之间以及非弹性应变之间的耦合。因此，该研究计划的主要目标是改进本构定律并开发可靠且稳健的数值工具来预测 3D 编织复合材料的机械行为。将进行实验室实验以确定耦合效应。将提出改进的损伤演化定律以及新的塑性发展定律。额外的冲击测试将在不同的能量水平上进行以验证模型。接下来，将对现实的代表性晶胞进行建模。将实施渐进损伤，并使用有限元软件 Abaqus 对 3D 复合材料进行虚拟测试并预测其机械行为。虚拟测试的结果将能够从理论上确定宏观 CDM 模型的本构方程、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坏和失效模式。开发的数值工具将允许模拟结构行为作为用于复合材料增强材料的 3D 编织结构的函数。模拟将有助于缩短设计周期并最大限度地减少要测试的组件数量。研究成果将有可能在汽车和航空领域得到广泛应用。