Detailed Information

Cited 0 time in webofscience Cited 0 time in scopus
Metadata Downloads

Mechanical Behavior of Coupled Elastoplastic Damage of Clastic Sandstone of Different Burial Depths

Authors
Zhang, YuWang, LuZi, GoangseupZhang, Yan
Issue Date
4월-2020
Publisher
MDPI
Keywords
clastic sandstone; elastoplastic damage; elastoplastic damage coupling model; burial depth
Citation
ENERGIES, v.13, no.7
Indexed
SCIE
SCOPUS
Journal Title
ENERGIES
Volume
13
Number
7
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/56807
DOI
10.3390/en13071640
ISSN
1996-1073
Abstract
Clastic sandstone is widely distributed in oil and gas reservoirs; its internal structure has many micro-defects. Under different stress environments of burial depth, significant damage evolution and plastic deformation easily occur. A series of triaxial compression tests were performed to study the coupled elastoplastic damage mechanical behavior of clastic sandstone samples at different burial depths ranging from 581.28 m to 979.82 m. Results reveal that the stress -strain responses of clastic sandstone samples exhibit significant nonlinear and softening characteristics. The mechanical behavior is due to the coupling of plastic deformation and mechanical damage. Plastic and damage internal variables cause damage stiffness degradation and plastic flow. Considering the coupling of elastoplastic damage in the loading process, an elastoplastic damage coupling model is proposed to study the mechanical behavior of different burial depth clastic sandstones. The model can effectively describe the mechanical behavior of clastic sandstone, such as the volume compression and dilatancy transformation, plastic hardening and damage softening, which are in good agreement with the experimental results. Furthermore, the mechanical behavior of the clastic sandstone shows a dependency on the confining pressure and burial depth. The load-bearing capacity and the ability to resist deformation of the clastic sandstone are improved as the confining pressure and burial depth increase. Relevant results can provide reliable basis for the safe exploitation of oil and gas engineering.
Files in This Item
There are no files associated with this item.
Appears in
Collections
College of Engineering > School of Civil, Environmental and Architectural Engineering > 1. Journal Articles

qrcode

Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.

Related Researcher

Researcher ZI, Goang seup photo

ZI, Goang seup
공과대학 (건축사회환경공학부)
Read more

Altmetrics

Total Views & Downloads

BROWSE