Improving low cycle fatigue performance of cracked aluminum plate with carbon fiber composite patches reinforced with B4C nanoparticles

IF 4.4 2区工程技术 Q1 ENGINEERING, MECHANICAL

Engineering Failure Analysis Pub Date : 2024-11-29 DOI:10.1016/j.engfailanal.2024.109139

Balaji Rajendran , Arumugam Vellayaraj

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引用次数: 0

Abstract

Composite patch over the cracked metal surface plays a vital role in repairing the damaged part of the lightweight structures, as it is one of the most efficient and could be done with the reduced cost. This manuscript documents the repair efficacy of pre-cracked aluminum alloy AA6061 under low cycle fatigue (LCF). As a novel attempt, the alloy is patched using carbon fiber composite, with and without nano ceramic boron carbide (B₄C) particles infused. In this regard, B₄C nanoparticles are added in 0.2%, 0.4%, and 0.6% wt. composition, referred herein as 2BCF, 4BCF, and 6BCF, respectively. Each sample, either patched and non-patched, are tested for LCF loading at two strain ratios, 0.1 and 0.3. LCF-test outcomes reveal that adding B₄C nanoparticles effectively reduces the plastic strain amplitude (PSA) and energy dissipation. As a result, the fatigue life of the patched AA6061 alloys is significantly improved. Notably, the sample 6BCF exhibits higher fatigue resistance at strain ratio of 0.1, resulting in 6.5-fold improvement in fatigue life compared to other patched specimens indicating a strong adhesion between the patch and the aluminum surface. Therefore, more stable response to fatigue loading is observed due to less dissipated energy.

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来源期刊

Engineering Failure Analysis 工程技术-材料科学：表征与测试

CiteScore

7.70

自引率

20.00%

发文量

956

审稿时长

47 days

期刊介绍： Engineering Failure Analysis publishes research papers describing the analysis of engineering failures and related studies. Papers relating to the structure, properties and behaviour of engineering materials are encouraged, particularly those which also involve the detailed application of materials parameters to problems in engineering structures, components and design. In addition to the area of materials engineering, the interacting fields of mechanical, manufacturing, aeronautical, civil, chemical, corrosion and design engineering are considered relevant. Activity should be directed at analysing engineering failures and carrying out research to help reduce the incidences of failures and to extend the operating horizons of engineering materials. Emphasis is placed on the mechanical properties of materials and their behaviour when influenced by structure, process and environment. Metallic, polymeric, ceramic and natural materials are all included and the application of these materials to real engineering situations should be emphasised. The use of a case-study based approach is also encouraged. Engineering Failure Analysis provides essential reference material and critical feedback into the design process thereby contributing to the prevention of engineering failures in the future. All submissions will be subject to peer review from leading experts in the field.