Results 1 to 10 of about 3,853,790 (297)

Stress relaxation constitutive model of rock based on Hausdorff derivative. [PDF]

PLoS ONE
Stress relaxation is a key time-dependent response that governs the long-term stability of deep underground rock engineering. In this study, staged uniaxial and triaxial stress relaxation tests on sandstone were carried out using an MTS815.02 triaxial ...
Yuemei Li
doaj   +2 more sources

Effect of stress relaxation on accelerated physical aging of hydrogenated nitrile butadiene rubber using time-temperature-strain superposition principle

Advanced Industrial and Engineering Polymer Research, 2019
While the stress relaxation is a common phenomenon for polymers, its effect on the stress/strain accelerated aging of the hydrogenated nitrile butadiene rubber (HNBR) cannot be ignored.
Qidi Peng, Zhongmeng Zhu, Chengkai Jiang, Han Jiang   +3 more
doaj   +3 more sources

Analyzing and modelling the accelerated stress relaxation caused by pulsed current of Ti2AlNb alloy foils [PDF]

Scientific Reports
Analyzing the electrically-assisted stress relaxation behavior of Ti2AlNb alloy is beneficial for improving the forming accuracy of Ti2AlNb alloy thin-walled components.
Jie Zhao, Tianyi Gao, Bao Qu, Min Cui, Rongfu Xu   +4 more
doaj   +2 more sources

Loading History Effect on Stress Relaxation of Rock Joints

Advances in Civil Engineering, 2021
In this study, a data analysis method for the relaxation test was proposed under step loading by conducting creep and stress relaxation tests of dentate discontinuity poured by cement mortar using biaxial creep machine under step loading and single-stage
Guanghui Tian, Weijian Liu, Haohao Ma, Qingzhao Zhang   +3 more
doaj   +1 more source

Experimental study on complex stress effect for stress relaxation aging behavior of Al-Cu-Li alloy

Journal of Materials Research and Technology, 2022
The highlight of this work is to investigate the effect of complex initial stress levels (from elastic to plastic regions) on the Stress relaxation aging (SRA) behavior of T34-2195 Al-Cu-Li alloys. The uniaxial tensile SRA experiment with various initial
Hailong Liao, Lihua Zhan, Feng Xia, Minghui Huang, Chunhui Liu, Shengmeng Hui, Peng Wang, Ruisheng Yang, Xiaobo Wang   +8 more
doaj   +1 more source

Aging process and strengthening mechanism of Cu–Cr–Ni alloy with superior stress relaxation resistance

Journal of Materials Research and Technology, 2022
With the development trend of connectors to high-current and high-temperature service, copper alloy connectors are required to have superior stress relaxation resistance.
Guojie Wang, Haitao Liu, Kexing Song, Yanjun Zhou, Chu Cheng, Huiwen Guo, Yingang Guo, Jing Tian   +7 more
doaj   +1 more source

Stress Relaxation Behavior and Springback Equation of 7050 Aluminum Alloys During Age-forming Process

Cailiao gongcheng, 2016
The stress relaxation behavior and springback equation of 7050 aluminum alloys during the age-forming process were studied through self-designed uniaxial tension device.
REN Wei-wei, ZOU Lin-chi, ZHANG Xing-feng, FU Dian-bao, CHEN Jun-feng   +4 more
doaj   +1 more source

Experimental and numerical research of stress relaxation behavior of magnetorheological elastomer

Polymer Testing, 2021
The paper presents experimental research and viscoelastic modeling of stress relaxation response of isotropic magnetorheological elastomer (MRE). The isotropic MRE has been prepared based on silicone matrix filled by magnetically micro-sized carbonyl ...
Tran Huu Nam, Iva Petríková, Bohdana Marvalová   +2 more
doaj   +1 more source

Effect of Virtual Reality on Stress Reduction and Change of Physiological Parameters Including Heart Rate Variability in People With High Stress: An Open Randomized Crossover Trial

Frontiers in Psychiatry, 2021
Introduction: Although, attempts to apply virtual reality (VR) in mental healthcare are rapidly increasing, it is still unclear whether VR relaxation can reduce stress more than conventional biofeedback.Methods: Participants consisted of 83 healthy adult
Hyewon Kim, Dong Jun Kim, Dong Jun Kim, Seonwoo Kim, Won Ho Chung, Kyung-Ah Park, James D. K. Kim, Dowan Kim, Min Ji Kim, Kiwon Kim, Hong Jin Jeon, Hong Jin Jeon   +11 more
doaj   +1 more source

Modeling and Verification of Stress Relaxation Behavior of Ti-6Al-4V [PDF]

MATEC Web of Conferences, 2020
The phenomenon of gradual decrease of internal stress with the deformation of material maintained under the precondition of certain temperature and initial stress or pre-strain is called stress relaxation.
Zhang Xingzhen, Deng Ying, Liang Tian, Jin Shihan, Li Weidong   +4 more
doaj   +1 more source