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: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=742350
• 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.

为了实现最终目标，即将加上制造的复合材料作为功能工程应用的最终用途零件，本研究追求以下两个长期目标：1-开发一种微机械模型来研究纤维增强的添加性添加性生产（FRAM）复合材料，旨在了解故障机制以防止/延迟失败和增强性能。 2-使用从上述开发的微力机械模型获得的洞察力和信息建立基于连续损伤力学（CDM）的渐进损伤模型，以预测静态，动态，循环和长期加载条件下Fram复合零件的故障。研究工作旨在提出经过实验验证的数值替代品，以在Fram复合材料上进行一些昂贵且耗时的实验。它尤其旨在检查失败机制以及这些机制如何受增材制造参数影响。本研究的短期目标的分解如下：1-具有代表性体积元素（RVE）的微机械模型的开发，该模型可以代表3D打印的纤维增强复合材料，而不是用于常规制造的复合材料的RVE。 2-将粘弹性和粘塑性的实施到纤维和热塑性基质的本构行为中。 3-用于纤维和基质成分材料表征的实验测试程序。 4-使用微机械模型预测3D印刷复合零件的有效特性。 5-使用微机械模型来确定失败机制以及微结构与机械性能之间的相关性。 6-开发CDM模型以预测3D印刷复合材料的故障。 7-在各种3D打印复合材料上的实验测试程序，并使用测试结果验证拟议的损坏模型。 8-将拟议的损害模型实施到基于商业有限元的软件中。根据加拿大航空工业协会的数据，先进的复合材料是对加拿大航空航天行业未来的三种“优先技术”之一。在这一领域的潜在潜力是使用添加性制造的复合零件。最近的研究表明，加强3D打印的热塑性成分可以大大增强机械性能，从而大大增强这些部分的功能。考虑到添加剂制造技术的各种优势，例如低成本，较短的生产时间和最少的材料浪费，使用3D打印的复合材料将是使用这些材料作为最终使用，功能性负载组件的重要一步。