Mechanical properties and energy features of high-water material under cyclic loading and unloading
by Xiaolong Li; Changwu Liu
International Journal of Oil, Gas and Coal Technology (IJOGCT), Vol. 24, No. 2, 2020

Abstract: The mechanical properties and energy features of high-water material under cyclic loading and unloading were studied. Results show that: cyclic loading and unloading has a weakening effect on the peak strength and has a strengthening effect on the residual strength of high-water material. During cyclic loading and unloading process, the stress-strain hysteresis effect is obvious. In the cyclic loading and unloading test with gradual increase of stress level, elastic modulus increases first and then decreases, total work, elastic energy, dissipation energy and energy dissipation rate of specimens increase as cycle number increases. In the cyclic loading and unloading test with constant stress level, elastic modulus decreases gradually, total work, elastic energy and dissipated energy of specimens remain stable overall as cycle number increases. Comparing with cyclic loading and unloading test with constant stress level, mass loss rate and energy dissipation rate of the same water to cement ratios specimen are greater in the cyclic loading and unloading test with gradual increase of stress level, it is easier to promote the accumulation and development of internal damage of high-water material. [Received: October 27, 2017; Accepted: July 31, 2018]

Online publication date: Fri, 01-May-2020

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

 
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.

Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Oil, Gas and Coal Technology (IJOGCT):
Login with your Inderscience username and password:

Username:        Password:          Forgotten your password?

Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.

If you still need assistance, please email subs@inderscience.com