Results 1 to 10 of about 323,431 (308)

Strain gradient effects on concrete stress–strain curve [PDF]

Proceedings of the Institution of Civil Engineers - Structures and Buildings, 2012
The stress–strain characteristic of concrete developed in flexure is one of the essential parameters for the ultimate flexural strength design of reinforced concrete (RC) members. Currently, the stress–strain curve of concrete developed in flexure is obtained by scaling down the uniaxial stress–strain curve.
Ho, JCM, Peng, J
openaire   +7 more sources

Physical factors involved in stress-wave-induced cell injury: The effect of stress gradient [PDF]

Ultrasound in Medicine & Biology, 1995
We have studied the biological effects of ablation-induced stress waves in vitro. Mouse breast sarcoma cells (EMT-6) were exposed to stress waves that differed only in rise time. Two assays were used to determine cell injury: incorporation of tritiated thymidine (viability assay), and transmission electron microscopy (morphology assay).
Doukas, Apostolos G, McAuliffe, Daniel J, Lee, Shun, Venugopalan, Vasan, Flotte, Thomas J   +4 more
openaire   +7 more sources

Gradient Interfaces Induce the Temporal and Spatial Stress Localization in Gradient Network-Structured Metallic Glasses Composites [PDF]

Metals
Gradient structure provides an effective approach to improve the combination of high strength and toughness compared to a uniform one. The gradient interfaces or boundaries in gradient-structured metallic glass composites play a crucial role in ...
Yongwei Wang, Guangping Zheng, Mo Li
doaj   +2 more sources

Tailoring combined impact loading using gradient foam composite projectiles with variable fragment shapes [PDF]

Scientific Reports
The combined effects of explosive shock waves and high-velocity fragments pose critical challenges to the structural integrity of protective systems. Traditional experimental approaches often oversimplify the problem, lacking systematic investigation ...
Pei Jiang, Chenxi Wu, Xinyi Wang, Lujun Cai, Dongwang Zhong, Jianjun Ma, Wei Zhang   +6 more
doaj   +2 more sources

Facilitation and competition deconstructed: a mechanistic modelling approach to the stress gradient hypothesis applied to drylands [PDF]

Scientific Reports
Facilitative interactions among species are key in plant communities. While experimental tests support the Stress Gradient Hypothesis (SGH) as an association between facilitation and stress, whether the shape of net effects along stress gradients can be ...
Rubén Díaz-Sierra, Max Rietkerk, Mart Verwijmeren, Mara Baudena   +3 more
doaj   +2 more sources

Is notch sensitivity a stress analysis problem? [PDF]

Fracture and Structural Integrity, 2013
Semi–empirical notch sensitivity factors q have been widely used to properly account for notch effects in fatigue design for a long time. However, the intrinsically empirical nature of this old concept can be avoided by modeling it using sound mechanical
Jaime Tupiassú Pinho de Castro, Marco Antonio Meggiolaro   +1 more
doaj   +2 more sources

3D thickness effects around notch and crack tip stress/strain fields [PDF]

Fracture and Structural Integrity, 2015
Notches and cracks are usually approximately modeled as two-dimensional problems using solutions from plane elasticity to quantify localized stress/strain concentration effects around their tips. However, they may be associated with high gradients that
R.C.O. Góes, J.T.P. Castro, M.A. Meggiolaro   +2 more
doaj   +1 more source

Study on Stress Sensitivity of Ultra-Low Permeability Sandstone Reservoir Considering Starting Pressure Gradient

Frontiers in Earth Science, 2022
When studying the influence of nonlinear seepage on the water flooding development of ultra-low permeability reservoirs, it is difficult to accurately characterize the nonlinear seepage state of ultra-low permeability reservoirs using conventional ...
Xiang Luo, Xiujuan Wang, Zhonghu Wu, Tongtong He, Xiangliang Qiu, Fang Yuan, Chengqian Tan   +6 more
doaj   +1 more source

Modeling of extra strengthening in gradient nanotwinned metals based on molecular dynamics

Frontiers in Materials, 2022
Gradient nanotwinned metals exhibit extra strengthening and work hardening behaviors, which have enormous potential for engineering applications. In this study, molecular dynamics method is performed for analyzing the effects of nanotwinned structure ...
Zailin Yang, Zailin Yang, Xiaoyang Ding, Yong Yang, Yong Yang, Minghe Li, Shihao Cao   +6 more
doaj   +1 more source

New method for introducing gradient stress into rock-burst prediction

Yantu gongcheng xuebao, 2020
During the excavation of underground projects, the tangential stress in the surrounding rock near the cave wall is distributed in a gradient because of the disturbance of excavation unloading in the deep rock mass.
HE Jia-qi 1, LIN Man-qing 1, LIU Xi-qi 2, ZHANG Lan 1, ZHANG Dian-ji 1, XIONG Wen 2, PENG Ya-li 3
doaj   +1 more source