Crack propagation behavior in the stacked \({{\varvec{TaC}}}\)–\({{\varvec{Gr}}}\) core–shell composites

IF 2.2 3区 工程技术 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY
Asghar Aryanfar, Mert Kulak, Nasser P. Vafa, Vahideh Shahedifar, Mahdi G. Kakroudi
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引用次数: 0

Abstract

The catastrophic fracture of the ceramics limits their utilization in industrial applications. Particularly despite the wide potential of the Tantalum carbide (TaC) it is prone to sudden fracture due to its brittleness. Therefore, covering it with the ductile graphite (Gr) shell could improve its toughness as a shock absorber. In this regard, a percolation-based image processing framework is developed to quantify the area, periphery, and tortuosity of the generated cracks, as a measure for the crack deflection, from three distinct methods and correlate it to the shell fraction, stacking mode, and the fracture energy. As well, defining equivalent material for the core–shell composition, finite element simulations were carried out to project the local (i.e. real state) shape function versus the crack progress which has led to the estimation of the critical crack size in flexural leading. The results are useful for quantifying and optimization of the design parameters for the core–shell composites and their arrangements versus the specified application.

叠层核壳复合材料裂纹扩展行为\({{\varvec{TaC}}}\) - \({{\varvec{Gr}}}\)
陶瓷的灾难性断裂限制了其在工业上的应用。特别是,尽管碳化钽(TaC)具有广泛的潜力,但由于其脆性,它容易发生突然断裂。因此,用延展性石墨(Gr)外壳覆盖可以提高其作为减震器的韧性。在这方面,我们开发了一个基于渗流的图像处理框架,通过三种不同的方法来量化所产生裂纹的面积、外围和弯曲度,作为裂纹挠度的度量,并将其与壳分数、堆叠模式和断裂能相关联。同时,定义了芯壳组成的等效材料,进行了有限元模拟,以投影局部(即真实状态)形状函数与裂纹进展的关系,从而估计了弯曲引出的临界裂纹尺寸。研究结果对核壳复合材料设计参数的量化和优化及其排列具有重要意义。
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来源期刊
International Journal of Fracture
International Journal of Fracture 物理-材料科学:综合
CiteScore
4.80
自引率
8.00%
发文量
74
审稿时长
13.5 months
期刊介绍: The International Journal of Fracture is an outlet for original analytical, numerical and experimental contributions which provide improved understanding of the mechanisms of micro and macro fracture in all materials, and their engineering implications. The Journal is pleased to receive papers from engineers and scientists working in various aspects of fracture. Contributions emphasizing empirical correlations, unanalyzed experimental results or routine numerical computations, while representing important necessary aspects of certain fatigue, strength, and fracture analyses, will normally be discouraged; occasional review papers in these as well as other areas are welcomed. Innovative and in-depth engineering applications of fracture theory are also encouraged. In addition, the Journal welcomes, for rapid publication, Brief Notes in Fracture and Micromechanics which serve the Journal''s Objective. Brief Notes include: Brief presentation of a new idea, concept or method; new experimental observations or methods of significance; short notes of quality that do not amount to full length papers; discussion of previously published work in the Journal, and Brief Notes Errata.
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