Bridging the gap between particle-based multi-scale modelling of the geometry and constitutive behaviour of technical textiles, and in-situ IR probing of their configuration

弥合产业用纺织品的基于粒子的几何形状和本构行为的多尺度建模与其配置的原位红外探测之间的差距

• 批准号: RGPIN-2015-05865
• 负责人: Robitaille, Francois
• 金额: $ 1.6万
• 依托单位: University of Ottawa
• 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=678609
• 关键词: Bridging; gap; between; particle; based

This proposal concerns high-performance, discontinuous engineered materials subject to stringent requirements on meso-scale geometry, constitutive behaviour and physical properties.***The proposal covers 1) further development of predictive particle-based modelling of the geometry and constitutive behaviour of technical textiles at the scales of fibres, yarns, unit cells and fabrics; 2) in-situ IR thermography used in probing technical textiles for inspection; 3) application of modelling and IR probing to engineered carbon fibre preforms for composites, biomedical textiles and other advanced textiles.***The proposal funds students doing fundamental work running and further developing particle-based simulations for a large array of industrial textiles and load cases; validating the simulations through experimental work; developing knowledge and models for the novel use of IR inspection for characterizing dry textiles made from multi-filament yarns and assemblies; and combining predictive modelling and IR inspection towards remote assessment of textile structures as loaded in the field, focusing on preforms, artificial ligaments and grafts, paper machine clothing and other textile structures. The proposal takes the next logical steps from work done under the PI's 2010-15 Discovery grant, and new objectives arising from ongoing applied projects. It is distinct in covering fundamental work not targeted as deliverable in current projects. Applications of this proposal's fundamental work will be visited in this proposal, and in future projects. The proposal features projects A, B and C as follows. The software and experimental infrastructure required is established.***Project A applies and further develops particle-based, multi-scale concurrent models of the geometry and constitutive behaviour of dry textiles subjected to various load cases. The physics-based modelling framework does not rely on empirical models; it is unique in modelling yarns as assemblies of fibres or clusters of fibres as opposed to continua, and in returning both elastic and time-dependent responses for materials made of strictly elastic fibres - time dependence results from stochastic rearrangement of fibres in time, in simulations as in experiments.***Project B develops robust expertise on the probing of dry textiles as discontinuous, heterogeneous and deformable assemblies of fibres featuring numerous interfaces and variable inter-fibre contacts using IR thermography, through experimental and modelling work. Limitations are also probed. This work relates to unique knowledge of the thermal conductivity of textiles, developed by the PI's team.***Project C connects predictive modelling from project A with knowledge from project B towards field inspection of carbon fibre preforms, biomedical textiles, paper-making clothing and other advanced textiles. The PI has ongoing activity with these textiles.**

该提案涉及高性能，不连续的工程材料，对中尺度的几何形状，本构行为和物理特性有严格的要求。 2）用于探测技术纺织品检查的原位IR热量表； 3）将建模和红外探测器应用于复合材料，生物医学纺织品和其他高级纺织品的工程碳纤维预形成。通过实验工作验证模拟；开发知识和模型，用于新颖使用IR检查以表征由多丝纱线和组件制成的干纺织品；并将预测性建模和IR检查结合在一起，以远程评估现场的纺织结构，重点是预形成，人工韧带和移植物，纸机衣服和其他纺织结构。该提案采取了下一个逻辑步骤，从PI的2010 - 15年发现赠款下完成的工作以及正在进行的应用项目引起的新目标。它在涵盖当前项目中未作为可交付的基本工作涵盖基本工作方面是独特的。该提案的申请将在本提案和未来的项目中访问。该提案的特色是项目A，B和C如下。建立了所需的软件和实验基础架构。基于物理的建模框架不依赖经验模型。它在将纱线建模为纤维或纤维簇的组合中是独一无二的，而不是连续曲子，并且返回对严格弹性纤维制成的材料的弹性和时间依赖性响应 - 时间依赖性 - 时间依赖于时间的随机重排，这是由于实验中的探测型均匀的固定型，并且在实验中进行了强大的介入。通过实验和建模工作，具有许多接口和纤维间触点的纤维的可变形组件。还探讨了局限性。这项工作涉及PI团队开发的纺织品导热率的独特知识。 PI与这些纺织品进行了持续的活动。**