Development and characterization of an impact-resilient 3D nano-reinforced fiber metal laminate composite

抗冲击 3D 纳米增强纤维金属层压复合材料的开发和表征

• 批准号: RGPIN-2017-05114
• 负责人: Taheri, Farid
• 金额: $ 2.7万
• 依托单位: Dalhousie University
• 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=686910
• 关键词: Development; characterization; impact; resilient; 3D

The global automotive industry has been recently challenged to increase the current fuel efficiency of automobiles by nearly 100% by 2025. One of the most important strategies has been to reduce the weight of vehicles, yet adhering tp the required crashworthiness.******In response to the above challenge, the proposed research aims at developing a hybrid composite material that is (i) relatively light-weight, (ii) provides the required stiffness and strength (iii) offers remarkable crashworthiness and (iv) yet, it is relatively cost-effective. The new material takes advantages of the marriage of a light-weight metallic alloy and a relatively inexpensive FRP to address the challenge. In other words, a recently developed truly novel 3D glass fabric is combined with light-weight magnesium alloy (MgA) sheets (75% lighter than steel) to produce an exemplary fiber-metal laminate composite (FML). To augment the performance of this unique composite panel, the cavities within the 3D-fabric could be filled with a light-weight foam. ***However, before this FML can be considered in vehicles, one must gain a thorough understanding of its performance under critical loading conditions. In past three years, we have been investigating the performance of various configurations of the 3D-FML under out-of-plane impact loading. Our investigation on performance of the FML under in-plane impulse loading has begun very recently. Our preliminary investigation has revealed that the quality of the interface bond between MgA and FRP has a significant effect on the buckling and post-buckling response of the FML. Therefore, to maximize the performance of the said FML, optimally functionalized inexpensive nanocarbon particles (namely, graphene platelets), will be used to economically and effectively enhance the resiliency of the interfaces.***Moreover, a key factor in promoting the use of the developed 3D-FML in future applications is the ability to predict the performance of the FML under critical loading conditions (e.g., axial impact), and generation of practical design curves, which will enable practicing engineers to implement differently configured 3D-FMLs for a given application. These tasks would have to be done in two stages. In the first stage, various aspects affecting the response of the FML should be characterized numerically. To optimize the performance of MgA/FRP interface, we will further improve the predictive capability of the numerical framework developed in past three years within our group, which included the effective use of the cohesive zone modeling (CZM). For that we intend to use the relatively recently developed “extended finite element method” (XFEM). Therefore, the basic aim of this part of the proposed research is to gain experience with XFEM, and investigate the effects of GNP inclusion in the resin used to mate FRP to MgA sheets, and to optimize the bond strength. **

最近，全球汽车行业受到挑战，即到2025年将当前的汽车燃油效率提高了近100％。最重要的策略之一是减轻车辆的重量，但要遵守TP的遇到的崩溃。崩溃的道理和（iv），但它相对具有成本效益。新材料利用了轻质金属合金的婚姻和相对便宜的FRP来应对挑战。换句话说，最近开发的真正新颖的3D玻璃织物与轻质镁合金（MGA）板（比钢轻75％）结合使用，以产生示例性纤维 - 金属层压板复合材料（FML）。为了增强这个独特的复合面板的性能，3D型式腔内的空腔可以充满轻质泡沫。 ***但是，在可以在车辆中考虑此FML之前，必须在关键的加载条件下对其性能有透彻的了解。在过去的三年中，我们一直在研究3D-FML的各种配置的性能。我们对FML在平面脉冲下载下的性能的投资最近开始了。我们的初步投资表明，MGA和FRP之间接口债券的质量对FML的屈曲和屈曲后反应有重大影响。因此，为了最大程度地提高所述FML的性能，最佳功能化的廉价纳米碳颗粒（即石墨烯血小板），将用于经济上有效地增强界面的弹性。实践设计曲线，这将使实践工程师能够为给定应用程序实施不同配置的3D-FML。这些任务必须在两个阶段完成。在第一阶段，应分别表征影响FML响应的各个方面。为了优化MGA/FRP界面的性能，我们将进一步提高过去三年来我们组中开发的数值框架的预测能力，其中包括有效使用凝聚区建模（CZM）。为此，我们打算使用相对开发的“扩展有限元方法”（XFEM）。因此，拟议的研究的这一部分的基本目的是获得XFEM的经验，并研究GNP包含在用于将FRP与MGA片相结合的树脂中的影响，并优化键强度。 **