Fundamental Study of Fatigue Life Enhancement in Hierarchical Carbon-Fiber/Epoxy/Nanoparticle Composites

多级碳纤维/环氧树脂/纳米颗粒复合材料疲劳寿命增强的基础研究

• 批准号: 2015750
• 负责人: Nikhil Koratkar
• 金额: $ 39.75万
• 依托单位: Rensselaer Polytechnic Institute
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2015750&HistoricalAwards=false
• 关键词: Fundamental; Study; Fatigue; Life; Enhancement

Carbon-fiber reinforced composites, with their favorable strength-to-weight and stiffness-to-weight ratios, are replacing their metal counterparts in a variety of high-performance structural applications. However, the principal limitation of such composite materials is their brittle failure and insufficient fatigue life. A new concept for fatigue-resistant carbon-fiber composites features a modified epoxy resin matrix that is infiltrated with nanoparticle additives. These nanoscale particles will be engineered to interfere with or disrupt crack propagation processes and thereby significantly prolong the fatigue life of the composite material. The ability to combat fatigue is critical for safe and reliable operation as well as reduction in the operational and maintenance costs for structural components. This will be of great benefit to the aerospace, defense, energy and automotive industries which extensively use carbon-fiber reinforced plastics. One of the emerging industries where such new fatigue-resistant materials can have high impact is in wind energy. Wind is one of the fastest growing energy technologies on the globe and enhancing the fatigue properties and the operating life of carbon-fiber composite materials used in wind turbine construction is therefore of great practical relevance.The goal of this project is to understand the fundamental mechanisms by which the nanoparticle additives enhance the fatigue life of the composite material and to reveal how these mechanisms are affected by the geometry, interface strength, loading fraction and dispersion of nanoparticles. To accomplish this, investigators will employ an integrated modeling, simulation, manufacturing, characterization and experimental fatigue testing approach to understand and optimize the underlying mechanisms that are responsible for fatigue life improvement. To be consistent with industrial practices, researchers will manufacture pre-pregs in which microfiber plies are pre-impregnated with nanoparticle-laden epoxy resins, or in which nanoparticles are pre-dispersed on the microfibers which are then impregnated with neat resins. The fundamental knowledge gained from the above tasks will be applied to establish processing-structure-property relationships that will be used to manufacture proof-of-concept carbon fiber-reinforced composites with optimized nanoparticle geometry, loading, dispersion and interface strength. These composites will be tested to quantify and benchmark the fatigue-life improvements that can be achieved relative to the traditional composites used by industry. This project will lead to an in-depth understanding of the role of the nanoparticle geometry, surface chemistry, loading fraction and dispersion in fatigue life improvements for the next generation of carbon-fiber reinforced composites.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

碳纤维增强复合材料及其有利的强度重量和重量比率，正在用各种高性能结构应用中代替其金属对应物。但是，这种复合材料的主要限制是它们的脆弱失败和疲劳寿命不足。一种用于抗疲劳的碳纤维复合材料的新概念具有改良的环氧树脂基质，并用纳米颗粒添加剂浸润。这些纳米级颗粒将被设计为干扰或破坏裂纹传播过程，从而显着延长复合材料的疲劳寿命。打击疲劳的能力对于安全可靠的运营以及降低结构组件的运营和维护成本至关重要。这将对广泛使用碳纤维增强塑料的航空航天，防御，能源和汽车行业有很大的好处。这种新的抗疲劳材料可能对风能产生高影响的新兴行业之一。风是全球增长最快的能源技术之一，并增强了风力涡轮机结构中使用的碳纤维复合材料的疲劳特性和运行寿命，因此具有很大的实用相关性。该项目的目的是了解基本机制，通过这些机制，纳米颗粒添加剂可以通过这些机制来增强这些机械材料和机械效果的效果，从而揭示了相互效果的效果。纳米颗粒的分散。为此，研究人员将采用集成的建模，模拟，制造，​​表征和实验性疲劳测试方法来理解和优化负责疲劳生活的基本机制。为了与工业实践一致，研究人员将制造预先进行的，其中超细纤维层被含有纳米粒子的环氧树脂预先浸渍，或者将纳米颗粒预分散在微纤维上，然后将其浸入，然后将其浸入纯净树脂上。从上面的任务中获得的基本知识将用于建立处理结构 - 特制关系，该关系将用于制造具有优化的纳米颗粒几何形状，装载，分散和界面强度的碳纤维增强复合材料。这些复合材料将经过测试，以量化和基准相对于行业使用的传统复合材料来实现的疲劳寿命改善。该项目将导致对纳米颗粒几何形状，表面化学的作用，载荷和分散的作用，从而在疲劳生活改善中的作用，以改善下一代碳纤维增强复合材料。该奖项反映了NSF的法规任务，并被认为是通过基金会的知识优点和广泛的criter criter criter criter criter criter criter criter criter criter criter criter criter criter criter criter criter criter criter criter criteria criter criter criter criter criter criter criter criter criter criter criteria crietia criter criter criter crititia奖。

项目成果

Reversing fatigue in carbon-fiber reinforced vitrimer composites

• DOI: 10.1016/j.carbon.2021.10.078
• 发表时间: 2021-11-08
• 期刊: CARBON
• 影响因子: 10.9
• 作者: Kamble, Mithil;Vashisth, Aniruddh;Koratkar, Nikhil
• 通讯作者: Koratkar, Nikhil

Improvement in fatigue life of carbon fibre reinforced polymer composites via a Nano-Silica Modified Matrix

• DOI: 10.1016/j.carbon.2020.08.029
• 发表时间: 2020-12-01
• 期刊: CARBON
• 影响因子: 10.9
• 作者: Kamble, Mithil;Lakhnot, Aniruddha Singh;Koratkar, Nikhil
• 通讯作者: Koratkar, Nikhil