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: $ 2.04万
• 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: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=712613
• 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.

聚合物基质复合材料最终已成为航空航天中的重要材料：波音787，空中客车A350，庞巴迪C系列都在很大程度上取决于这些材料。 同样，在风能领域中使用复合材料现在很重要，并且由宝马以i3和i8系列为导致汽车中的复合材料有重大的举动。 在所有情况下，能够尽快有效地控制复杂结构而控制过程质量的能力至关重要。 在很早的时候提出了过程仿真（如今包含在集成的计算材料工程或多尺度建模中），作为降低风险和优化复合材料处理的方法。 仿真一直对复合材料具有吸引力，因为材料和结构基本上是同时进行的。因此，当面对真实部分和几何形状时，问题的复杂性迅速缩放。 该建议是为了对下一代复合材料制造科学的基本理解，用于新的，更快，更便宜，更可持续和更绿色的过程，包括增材制造。 提议的工作的总体目标是在（a）从未固定状态到固化状态的热固性树脂的机械行为进行连贯，连续的描述，以在一系列温度下，从而使材料行为从玻璃状到橡胶（以及液体，如果是胶合）。 感兴趣的行为包括粘弹性和粘弹性响应（粘度，存储和丢失模量）以及表面张力，治愈的收缩和热膨胀效应； （b）由这种树脂制成的预训练，包括初始纤维波（来自预先训练过程）的影响以及材料在凝胶前状态下皱纹的能力。 对材料响应的描述应该是兼容构成方程的基础，该方程描述了在这种广泛条件下的材料响应。 这将是对当前最新状态的重大进步，在这种情况下，材料特性的表征是以脱节和分散的方式进行的，并做出了主要的假设。 当前使用的第一代材料表征的益处是对残余应力和维度变化的第一代过程模拟的好处。 随着本提案中设想的基本工作，我们将扩大和加深基本树脂和预处理行为的基本特征和代表，这是在未来几十年中引起的材料和过程范围内的范围。 只有具有坚实的科学基础才能先进的制造才能成为现实。