Characterization and modelling of pre-gelation/gelation behaviour of polymer composites

聚合物复合材料预凝胶/凝胶行为的表征和建模

• 批准号: RGPIN-2018-04749
• 负责人: Poursartip, Anoush
• 金额: $ 4.08万
• 依托单位: University of British Columbia
• 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=758193
• 关键词: Characterization; modelling; pre; gelation; behaviour

Polymer matrix composite materials have finally become significant materials in aerospace: the Boeing 787, Airbus A350, Bombardier C-Series all depend heavily on these materials. Likewise, the use of composites in the wind energy sector is now significant, and there is a major move to composites in automotive, led by BMW with their i3 and i8 series. In all cases, the ability to reliably manufacture complex structures as quickly and efficiently as possible yet control the quality of the process is critical. Process simulation (nowadays included in Integrated Computational Materials Engineering or Multi-Scale Modelling) was proposed very early on as a method to reduce risk and optimize processing of composites. Simulation has always been attractive for composites as the material and structure are essentially made at the same time; thus the complexity of the problem scales rapidly when faced with real parts and geometries.This proposal is for fundamental understanding of manufacturing science of next generation composites for newer, faster, cheaper, more sustainable and greener processes including additive manufacturing.The overarching objective of the proposed work is to develop a coherent and continuous description of the mechanical behaviour of (a) a thermoset resin from the uncured to the cured state, over a range of temperatures taking the material behaviour from glassy to rubbery (and fluid if pre-gelation). The behaviour of interest includes the viscous and viscoelastic response (viscosity, storage and loss moduli) as well as surface tension, cure shrinkage, and thermal expansion effects; and (b) a prepreg made of such resin, including the effect of initial fibre waviness (from the prepregging process) as well as the ability of the material to wrinkle in the pre-gelation state. The description of the material response should be the basis of compatible constitutive equations that describe the material response over this wide range of conditions. This will be a major advance on the current state of the art where the characterization of material properties has been done in a disjointed and scatter-shot manner, and major assumptions made.The benefits of currently used first generation characterization of materials for first generation process simulations of residual stress and dimensional change are increasingly obvious. With the fundamental work envisaged in this proposal, we will broaden and deepen the fundamental characterization and representation of basic resin and prepreg behaviour over the range of materials and processes that will be of significant interest in the next decades. Only with a solid science base can advanced manufacturing become a reality.

聚合物基复合材料终于成为航空航天领域的重要材料：波音787、空中客车A350、庞巴迪C系列都严重依赖这些材料。同样，复合材料在风能领域的使用现在也很重要，汽车领域也出现了向复合材料的重大转变，以宝马(BMW)的i3和i8系列为首。在所有情况下，尽可能快速、高效地可靠地制造复杂结构并控制工艺质量的能力是至关重要的。工艺模拟(现在包括在集成计算材料工程或多尺度建模中)很早就被提出，作为一种降低风险和优化复合材料工艺的方法。对于复合材料来说，模拟一直是很有吸引力的，因为材料和结构基本上是同时进行的；因此，当面对真实的部件和几何形状时，问题的复杂性很快就会扩大。这项建议是为了从根本上理解新一代复合材料的制造科学，包括添加剂制造在内的更新、更快、更便宜、更可持续和更环保的工艺。拟议工作的总体目标是开发一种连贯和连续的描述：(A)热固性树脂在一定温度范围内从未固化状态到固化状态的机械行为，将材料行为从玻璃性到橡胶(如果预凝胶化，则为流体)。感兴趣的行为包括粘性和粘弹性反应(粘度、储存和损失模数)以及表面张力、固化收缩和热膨胀效应；和(B)由这种树脂制成的预浸料，包括初始纤维波纹度的影响(来自预浸工艺)以及材料在预凝胶化状态下的起皱能力。材料响应的描述应该是描述在这种广泛条件下的材料响应的相容本构方程的基础。这将是对当前技术状态的重大进步，其中材料属性的表征已经以不连续和分散的方式完成，并做出了主要假设。当前使用的第一代材料表征用于第一代工艺模拟残余应力和尺寸变化的好处越来越明显。随着本提案中设想的基础性工作，我们将扩大和深化基础树脂和预浸料在各种材料和工艺中的基本表征和表现，这些材料和工艺将在未来几十年产生重大影响。只有扎实的科学基础，先进制造才能成为现实。