Bridging the scales: from the toughness of small specimens to the damage tolerance of large aerospace panels

弥合尺度：从小样本的韧性到大型航空航天面板的损伤容限

• 批准号: EP/I030034/1
• 负责人: Silvestre Pinho
• 金额: $ 48.54万
• 依托单位: Imperial College London
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2011
• 资助国家: 英国
• 起止时间: 2011 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FI030034%2F1
• 关键词: Bridging; scales; toughness; small; specimens

The introduction of Carbon Fibre Reinforced Plastics (CFRP) for major structural parts in commercial aircraft leads to the need to predict the mechanical response, including failure and damage tolerance for these materials. The difficulty in predicting accurately failure and damage tolerance lies both on the complexity of the failure processes and in the scale at which they occur. In fact, the scales at which failure must be analysed (micro meters) are much smaller than the typical aerospace component scale (metres), and it is well known that strength and toughness depend on component size.This proposal will address the above, by focusing on three challenges. Firstly, the project will assess how tough these composites are at opposing the propagation of cracks which break entire panels (mixed mode translaminar fracture toughness). In continuation, the failure processes will be looked at in detail, so that suitable micromechanical models may be developed. Finally, the project will focus on developing computer codes which will assist Engineers in more effectively designing composite components.

商用飞机主要结构部件采用碳纤维增强塑料（CFRP）后，需要预测这些材料的机械响应，包括失效和损伤容限。准确预测失效和损伤容限的困难在于失效过程的复杂性和它们发生的规模。事实上，分析失效的尺度（微米）比典型的航空航天部件尺度（米）小得多，而且众所周知，强度和韧性取决于部件的尺寸。首先，该项目将评估这些复合材料在对抗破坏整个面板的裂纹扩展方面的坚韧（混合模式跨层断裂韧性）。在后续工作中，将详细研究失效过程，以便建立合适的微观力学模型。最后，该项目将侧重于开发计算机代码，以帮助工程师更有效地设计复合材料部件。

项目成果

Modelling mixed-mode translaminar fracture

混合模式跨层骨折建模

• 发表时间: 2014
• 作者: Laffan, M

Mixed-mode translaminar fracture of laminated composites

层合复合材料的混合模式跨层断裂

• 发表时间: 2013
• 作者: Laffan M

An analytical model for the translaminar fracture toughness of fibre composites with stochastic quasi-fractal fracture surfaces

• DOI: 10.1016/j.jmps.2014.02.001
• 发表时间: 2014-05-01
• 期刊: JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
• 影响因子: 5.3
• 作者: Pimenta, Soraia;Pinho, Silvestre T.
• 通讯作者: Pinho, Silvestre T.

Modelling the size-dependent mode I translaminar fracture toughness of unidirectional fibre-reinforced composites

模拟单向纤维增强复合材料尺寸相关的 I 型跨层断裂韧性

• 发表时间: 2013
• 作者: Pinho, ST

Mixed-mode translaminar fracture: failure analysis, fractography and numerical modelling

混合模式跨层断裂：失效分析、断口分析和数值模拟

• 发表时间: 2013
• 作者: Laffan, M