Results 231 to 240 of about 213,966 (314)

Fracture behavior and damage mechanisms of sandstone subjected to wetting-drying cycles

Engineering Fracture Mechanics, 2020
Rocks are usually subjected to cyclic wetting-drying due to the periodical changes in moist condition. To investigate the effect of wetting-drying cycles on the fracture behavior of sandstone, notched semi-circular bending tests were performed on ...
Xin Cai, Zilong Zhou, Lihai Tan, Haizhi Zang, Zhengyang Song   +4 more
semanticscholar   +1 more source

Study of Fracturing Fluid on Gel Breaking Performance and Damage to fracture conductivity

, 2020
As a thickening agent commonly used in hydraulic fracturing, guar gum has the advantage of low price and excellent performance. However, the gel breaking mechanism of fracturing fluid under high temperature and high pressure environment and the damage ...
Jie Wang, Yixiao Huang, Yan Zhang, Fu-jian Zhou, Erdong Yao, Rui Wang   +5 more
semanticscholar   +1 more source

Fracture Face Damage—It Matters

Proceedings of SPE European Formation Damage Conference, 2005
Abstract The poorer-than-expected performance of some fracturing treatments has been an issue for decades. Considerable effort has been devoted to improved modeling of fracturing treatments so that improved expectations can be provided. Fracturing fluids have been modified to enhance cleanup. Proppant conductivity studies have lead to
R. Gdanski, J. Weaver, B. Slabaugh, H. Walters, M. Parker   +4 more
openaire   +1 more source

Fracture and damage at a microstructural scale

Computing in Science & Engineering, 1999
Studying fracture surfaces of materials has been very useful in discriminating between different theoretical models. In the future, models and simulations should be able to help design suitable microstructures for tough materials. It is concluded that experiments in quantitative fractography perhaps have raised more questions than answers.
Elisabeth Bouchaud, Florin Paun
openaire   +1 more source

Quantitative damage, fracture mechanism and velocity structure tomography of sandstone under uniaxial load based on acoustic emission monitoring technology

, 2021
Rock is an opaque medium body, and it is impossible to visually see its internal damage, which brings difficulties to the investigation of rock damage. In the light of the problems of rock damage, fracture mechanism and velocity structure evolution under
Qiangqiang Zheng, Ying Xu, Hao Hu, Jiawei Qian, Yan Ma, Xin Gao   +5 more
semanticscholar   +1 more source

Transformation of fracture mechanism and damage behavior of ceramic-matrix composites during nano-scratching

, 2020
The material removal mechanism of Cf/SiC composites in brittle regime is more complex than that of single-phase materials. Variable loading nano-scratch tests of unidirectional Cf/SiC composites along different fiber orientations were carried out ...
Jie Chen, Q. An, Ming Chen
semanticscholar   +1 more source

3D Discrete Fracture Network (DFN) models of damage zone fluid corridors within a reservoir-scale normal fault in carbonates: Multiscale approach using field data and UAV imagery

, 2021
We combined structural data collected in the field and those obtained from a virtual outcrop model constructed from drone imagery, to perform Discrete Fracture Network (DFN) modelling and to characterize the fracture distribution within the damage zone ...
L. Smeraglia, M. Mercuri, S. Tavani, A. Pignalosa, M. Kettermann, A. Billi, E. Carminati   +6 more
semanticscholar   +1 more source

Ductile fracture prediction of additive manufactured Ti6Al4V alloy based on an extended GTN damage model

Engineering Fracture Mechanics, 2021
Selective Laser Melting (SLM) is one of the revolutionary additive manufacturing (AM) technologies to produce metallic mechanical parts. To thoroughly understand the damage and fracture behavior of SLM-fabricated Ti6Al4V alloy under complex stress states,
Xuan Yang, Yazhi Li, Wei Jiang, Min-ge Duan, Dong Chen, Biao Li   +5 more
semanticscholar   +1 more source

Fracture toughness and damage development in limpet shells

Theoretical and applied fracture mechanics (Print), 2018
Fracture toughness is an important property for many biological materials, but it can be difficult to obtain accurate and relevant values of toughness in such materials owing to complexities of geometry, material anisotropy, etc.
Maeve O'Neill, D. Cafiso, R. Mala, G. La Rosa, D. Taylor   +4 more
semanticscholar   +1 more source

Size effect analysis of quasi-brittle fracture with localizing gradient damage model

International journal of damage mechanics, 2021
The size effect of a quasi-brittle fracture is associated with the size of fracture process zone relative to the structural characteristic length. In numerical simulations using damage models, the nonlocal enhancement is commonly adopted to regularize ...
Yi Zhang, A. S. Shedbale, Y. Gan, Juhyuk Moon, L. H. Poh   +4 more
semanticscholar   +1 more source