Dynamic Behaviour of Polymer-Matrix Materials

聚合物基材料的动态行为

• 批准号: RGPIN-2020-07178
• 负责人: Petel, Oren
• 金额: $ 1.97万
• 依托单位: Carleton University
• 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=718727
• 关键词: Dynamic; Behaviour; Polymer; Matrix; Materials

My proposed research program investigates the dynamic response of polymer-matrix materials under high-strain-rate loading, focusing on the role of mesoscopic variations in heterogeneity on the response of the bulk materials. The dynamic response of these materials can exhibit strongly rate-dependant behaviour under mesostructural deformation and reorganization, which is often exploited in protective applications. This research program covers two thrust areas pertaining to these types of materials: (i) Polymer-matrix composites (PMCs) and (ii) Polymer foams and cellular materials, which each have their own heterogeneous characteristics. Together these thrust areas define a comprehensive research program into polymer-matrix materials under high-strain rate loading. The principal long-term objectives of the research program include: advancing the fundamental knowledge of materials under impulsive loading. investigating mesoscale variations on bulk material behaviour developing new experimental test methodologies exploring innovative materials for protective equipment training the next generation of researchers and innovators A summary of the research efforts in the proposed thrust areas is as follows: (i) PMCs have the potential to improve existing protective technologies. The addition of hard inclusions within PMCs often strengthen the surrounding polymer matrix, however limited data is available to relate mesoscale properties and bulk material response at the high strain rates. The ultimate objective of this work is to investigate the effects of a broad parametric variation of PMCs on their deformation and failure behaviour across several orders of magnitude of strain rates. (ii) Foams are used extensively in protective applications due to their energy absorption capacity. New manufacturing techniques have enabled mesoscale optimization of protective structures to provide superior protection against a wide range of potentially injurious events. The primary objective of the proposed research is to further our understanding of the dynamic response of foams under a variety of impulsive loading conditions using novel diagnostic capabilities, such as a high-speed X-ray cinematography system. The immediate industrial applications of the proposed research pertain primarily to the advancement of protective equipment. The multidisciplinary nature of the research plan, which includes elements of materials, hierarchical design, multi-rate experimental testing platforms and cutting-edge imaging modalities provides an effective training environment for my HQP. HQP training will be further enriched by close collaborations with industrial and government partners focused on advancing protective material and testing technologies relevant to a range of commercial applications (e.g., helmets). This research program, and the effective integration of HPQ from under-represented groups, will result in innovative HQP providing economic benefits to Canada.

我提出的研究计划研究聚合物基材料在高应变率载荷下的动态响应，重点研究不均匀性的介观变化对块体材料响应的作用。这些材料的动态响应在细观结构变形和重组下表现出强烈的速率依赖性行为，这通常在防护应用中得到利用。该研究计划涵盖与此类材料相关的两个重点领域：(i) 聚合物基复合材料 (PMC) 和 (ii) 聚合物泡沫和多孔材料，每种材料都有自己的异质特性。这些推力领域共同定义了高应变率负载下聚合物基材料的综合研究计划。该研究计划的主要长期目标包括： 提高脉冲载荷下材料的基础知识。 研究散装材料行为的介尺度变化 开发新的实验测试方法 探索防护装备的创新材料 培训下一代研究人员和创新者 拟议重点领域的研究工作总结如下： (i) PMC 有潜力改进现有的防护技术。 PMC 中硬质夹杂物的添加通常会增强周围的聚合物基体，但可用于关联介观性质和高应变率下块体材料响应的数据有限。这项工作的最终目标是研究 PMC 的广泛参数变化对其在几个数量级的应变率下的变形和失效行为的影响。 (ii) 泡沫由于其能量吸收能力而广泛用于防护应用。新的制造技术实现了防护结构的介观优化，从而针对各种潜在的有害事件提供卓越的保护。本研究的主要目的是利用高速 X 射线电影摄影系统等新型诊断功能，进一步了解泡沫在各种脉冲载荷条件下的动态响应。 拟议研究的直接工业应用主要涉及防护设备的进步。该研究计划的多学科性质，包括材料要素、分层设计、多速率实验测试平台和尖端成像模式，为我的总部提供了有效的培训环境。通过与工业和政府合作伙伴的密切合作，总部培训将进一步丰富，重点是推进与一系列商业应用（例如头盔）相关的防护材料和测试技术。这项研究计划以及来自代表性不足群体的 HPQ 的有效整合，将带来创新的 HQP，为加拿大带来经济效益。