Numerical investigation on the crack resistance curve of thermally treated quartz-diorite rock under mixed mode I + II loading

IF 3.1 2区材料科学 Q2 ENGINEERING, MECHANICAL

Fatigue & Fracture of Engineering Materials & Structures Pub Date : 2024-06-24 DOI:10.1111/ffe.14354

You Wu, Tubing Yin, Yongjun Chen, Jiexin Ma, Wenxuan Guo, Zheng Yang

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引用次数: 0

Abstract

To investigate the effects of thermal treatment and loading conditions on the crack initiation and propagation characteristics of quartz-diorite, mixed mode I + II fracture tests were conducted by using three-point bending (TPB) specimens. The numerical model, established on ABAQUS, couples the initial fracture toughness criterion and cohesive zone model to predict the crack initiation and propagation. The effects of thermal treatment and loading conditions on the crack propagation process, crack resistance curve, fracture path, and some fracture parameters at peak load have been analyzed and discussed. The results demonstrate that the thermal treatment has an obvious influence on the crack resistance curve of the specimen. The crack of the specimen will be dominated by the mode I fracture component with crack extension. The numerical results also show that the temperature and loading condition affect the crack length and fracture toughness at peak load.

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热处理石英闪长岩在 I+II 混合模式加载下的抗裂曲线数值研究

为了研究热处理和加载条件对石英闪长岩裂纹萌发和扩展特性的影响，使用三点弯曲（TPB）试样进行了 I+II 混合模式断裂试验。在 ABAQUS 上建立的数值模型结合了初始断裂韧性准则和内聚区模型来预测裂纹的萌发和扩展。分析并讨论了热处理和加载条件对裂纹扩展过程、裂纹阻力曲线、断裂路径以及峰值载荷下一些断裂参数的影响。结果表明，热处理对试样的抗裂曲线有明显影响。试样的裂纹将以模式 I 断裂成分为主，并伴有裂纹扩展。数值结果还表明，温度和加载条件会影响峰值载荷下的裂纹长度和断裂韧性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Fatigue & Fracture of Engineering Materials & Structures 工程技术-材料科学：综合

CiteScore

6.30

自引率

18.90%

发文量

256

审稿时长

4 months

期刊介绍： Fatigue & Fracture of Engineering Materials & Structures (FFEMS) encompasses the broad topic of structural integrity which is founded on the mechanics of fatigue and fracture, and is concerned with the reliability and effectiveness of various materials and structural components of any scale or geometry. The editors publish original contributions that will stimulate the intellectual innovation that generates elegant, effective and economic engineering designs. The journal is interdisciplinary and includes papers from scientists and engineers in the fields of materials science, mechanics, physics, chemistry, etc.