Mechanical performance modeling and failure prediction of Fiber Reinforced Additively Manufactured (FRAM) composites under static, dynamic, cyclic, and long-term loading conditions

静态、动态、循环和长期负载条件下纤维增强增材制造 (FRAM) 复合材料的机械性能建模和失效预测

• 批准号: RGPIN-2021-03053
• 负责人: Fawaz, Zouheir
• 金额: $ 2.33万
• 依托单位: Ryerson University
• 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=743241
• 关键词: Mechanical; performance; modeling; failure; prediction

Towards the ultimate goal of using additively manufactured composites as end-use parts for functional engineering applications, this research pursues the following two long-term objectives: 1- Develop a micromechanical model to study Fiber Reinforced Additively Manufactured (FRAM) composites aimed at understanding the failure mechanisms in order to prevent/delay failure and enhance performance. 2- Establish a progressive damage model based on Continuum Damage Mechanics (CDM) using the insight and information obtained from the afore-developed micromechanical model to predict the failure of FRAM composite parts under static, dynamic, cyclic, and long-term loading conditions. The research effort seeks to present an experimentally validated numerical substitute for some of the costly and time-consuming experiments on FRAM composite materials. It aims in particular to examine the failure mechanisms and how these mechanisms are influenced by the additive manufacturing parameters. The break-down of the short-term objectives of this study is as follows: 1- Development of a micromechanical model with a Representative Volume Element (RVE) that can represent a 3D-printed fiber reinforced composite as opposed to the RVE used for conventionally manufactured composites. 2- Implementation of viscoelasticity and viscoplasticity into the constitutive behaviour of the fiber and thermoplastic matrix. 3- Experimental test program for material characterization of the fiber and matrix constituents. 4- Using the micromechanical model to predict the effective properties of 3D printed composite parts. 5- Using the micromechanical model to determine failure mechanisms and the correlation between the microstructure and the mechanical properties. 6- Development of a CDM model to predict the failure of 3D printed composites. 7- Experimental test program on various 3D printed composites and using the test results to validate the proposed damage model. 8- Implementation of the proposed damage model into a commercial Finite element- based software. According to the Aerospace Industries Association of Canada, advanced composites are one of three "priority technologies" of strategic importance to the future of the Canadian Aerospace Industry. An untapped potential in this area is the use of additively manufactured composite parts. Recent studies have shown that reinforcing 3D printed thermoplastic components can greatly enhance the mechanical properties and thus the functionality of these parts. Considering the various advantages of the additive manufacturing technology such as low cost, short production time, and minimal waste of material, the use of 3D printed composites will be a great step towards employing these materials as end-use, functional load- bearing components.

为了将添加制造的复合材料用作功能工程应用的终端部件这一最终目标，本研究追求以下两个长期目标：1-开发一个细观力学模型来研究纤维增强加成型(FRAM)复合材料，旨在了解失效机理，以预防/延迟失效并提高性能。2-建立基于连续损伤力学(CDM)的渐进损伤模型，利用从前面开发的细观力学模型中获得的见解和信息来预测FRAM复合材料部件在静态、动态、循环和长期加载条件下的失效。这项研究工作试图提供一种经过实验验证的数值替代方法，以取代一些昂贵且耗时的FRAM复合材料实验。它的目的特别是检查失效机制，以及这些机制如何受附加制造参数的影响。这项研究的短期目标分解如下：1-开发具有代表性体积单元(RVE)的微观力学模型，该模型可以表示3D打印纤维增强复合材料，而不是用于传统制造的复合材料的RVE。2-将粘弹性和粘塑性应用于纤维和热塑性塑料基质的本构行为。3-纤维和基质成分的材料特性的实验测试程序。4.利用细观力学模型对3D打印复合材料零件的有效性能进行预测。5-使用细观力学模型来确定失效机制以及显微组织与力学性能之间的关系。6-开发用于预测3D打印复合材料失效的CDM模型。7.对各种3D打印复合材料的实验测试程序，并使用测试结果来验证所提出的损伤模型。8-将所提出的损伤模型应用到基于商业有限元的软件中。根据加拿大航空航天工业协会的说法，先进复合材料是对加拿大航空航天工业的未来具有战略重要性的三项“优先技术”之一。在这一领域一个尚未开发的潜力是使用添加制造的复合材料部件。最近的研究表明，增强3D打印热塑性塑料部件可以极大地提高这些部件的力学性能，从而提高其功能。考虑到添加剂制造技术具有成本低、生产时间短、材料浪费少等优点，3D打印复合材料的使用将是朝着将这些材料用作最终用途、功能承载部件迈出的一大步。