Differential Response of Fracture Characterization of Mode III Fracture in Sandstone Under Dynamic Versus Static Loading

IF 3.2 2区材料科学 Q2 ENGINEERING, MECHANICAL Fatigue & Fracture of Engineering Materials & Structures Pub Date : 2024-12-30 DOI:10.1111/ffe.14538

Xiaofeng Qin, Haijian Su, Liyuan Yu, Hao Wang, Ying Jiang, Thi Nhan Pham

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Abstract

This work examines the effect of loading rate ( $\overset{\cdot}{K}$ ) on the mode III fracture behavior of sandstone. Edge-notched diametrically compressed (ENDC) disc sandstone specimens were tested under different static and dynamic mode III fracture loadings, revealing a clear loading rate effect on both mode III and mode I fractures. Specifically, the peak load and fracture toughness (K_IIIC, K_IC) increase as the $\overset{\cdot}{K}$ increases across both static and dynamic scales. At the static scale, the K_IIIC is about 1.28–1.38 times of the K_IC, whereas at the dynamic scale, the K_IIIC is less than the K_IC. The relationship between K_IIIC and K_IC is affected by the loading scale and the shape of the specimen, but the data collected thus far indicate that the origin and type of rock have minimal effect on this relationship. In addition, the fracture surface morphology characteristics were quantitatively analyzed.

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砂岩中模式 III 断裂在动态和静态载荷下的差异响应特征

本文研究了加载速率（K·$$ \overset{\cdotp }{K} $$）对砂岩III型断裂行为的影响。对边缘缺口直径压缩（ENDC）盘状砂岩试样在不同静态和动态III型裂缝加载下进行了测试，发现加载速率对III型和I型裂缝均有明显的影响。在静态和动态尺度上，峰值载荷和断裂韧性（KIIIC， KIC）随K·$$ \overset{\cdotp }{K} $$的增加而增加。在静态尺度上，KIIIC约为KIC的1.28 ～ 1.38倍，而在动态尺度上，KIIIC小于KIC。KIIIC和KIC之间的关系受加载尺度和试样形状的影响，但迄今收集的数据表明，岩石的来源和类型对这种关系的影响很小。此外，定量分析了断口形貌特征。

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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.