Results 231 to 240 of about 9,675 (269)

Intervertebral Disc Mechanics Are Restored Following Cyclic Loading and Unloaded Recovery

Annals of Biomedical Engineering, 2004
The objectives of this study were (1) to quantify changes in the mechanical behavior of the intervertebral disc in response to cyclic compressive loading and (2) to determine whether mechanical behavior would be restored following a period of unloading.
Wade, Johannessen, Edward J, Vresilovic, Alexander C, Wright, Dawn M, Elliott   +3 more
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Experimental Study on Mesodamage of Migmatite Under Cyclic Loading and Unloading

Geotechnical and Geological Engineering, 2020
To study the mesodamage of migmatite under cyclic loading, single cycle loading and unloading tests of migmatite were carried out under different confining pressures (σ3) and stress ratios (p), and acoustic emission (AE) technology was used to monitor the evolution of microcracks. Additionally, the mesodamage of migmatite was analyzed from the porosity
Laishan Chang, Yuan Chang, Yalin Wu, Xiaoxiao Sang   +3 more
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Change in ultrasonic parameters with loading/unloading process in cyclic loading of aluminium alloy

Materials Science and Engineering: A, 2004
A local immersion method of the ultrasonic measurement was applied to real-time measurement of the ultrasonic parameters, in aluminium alloy (A2024-T3) specimens with curved sides during cyclic loadings in fatigue testing. The propagation time of the ultrasonic wave from the surface to the bottom of the specimen changed with time corresponding to the ...
X. H. Min, H. Kato
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Cyclic loading–unloading creep behavior of composite layered specimens

Acta Geophysica, 2019
Soft and hard interbedded rocks show obvious time-dependent deformation after deep tunnel excavations, and it is therefore necessary to research the mechanical behavior of the layered rock. However, it is hard to obtain ideal transversely isotropic rocks in fields, so rock-like specimens were poured by using artificial materials.
Bo Hu, Sheng-Qi Yang, Peng Xu, Jian-Long Cheng   +3 more
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The deformation and permeability of Yanji mudstone under cyclic loading and unloading

Journal of Mountain Science, 2019
During the constructions of motorways and high-speed railway lines in the Yanji Basin, large amounts of excess mudstones due to the enormous tunnel excavations and slope cuts would be deposited as landfills. Assessing the deformation and permeability of Yanji mudstone became important for the design, construction and operation of the landfills.
Zhi-xiong Zeng, Ling-wei Kong, Jun-tao Wang   +2 more
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Compressive and sealing characteristics of PTFE under cyclic loading-unloading

Journal of Wuhan University of Technology-Mater. Sci. Ed., 2015
Compressive and sealing characteristics of PTFE under cyclic loading-unloading at room temperature are studied in order to evaluate the cyclic sealing performance of control valve comprehensively. The unloading characteristics are different from the loading ones, therefore there is hysteresis between the unloading and loading curves.
Ning Zhang, Qiang Li, Kang Hu, Qing Li
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Determination of Critical Strains in Isotactic Polypropylene by Cyclic Loading-Unloading

Journal of Engineering Materials and Technology, 2008
By analyzing the deformation of α—isotactic polypropylene through cyclic uniaxial compression at different temperatures—conclusions are drawn on the contribution of the crystalline phase and the amorphous phase to the hardening curve. The deformation of the crystalline phase, which deforms mainly by simple shear of the crystallites, strongly depends on
Spieckermann, Florian, Wilhelm, Harald, Schafler, Erhard, Aifantis, Elias, Zehetbauer, Michael   +4 more
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A micromechanical model for loading and unloading behavior of fiber reinforced plastics under cyclic loading

Polymer Composites, 2020
AbstractThe high fatigue resistance and low weight features make the unidirectional‐carbon fiber reinforced plastics (UD‐CFRP) attractive for cyclic loading applications. However, the complex damage mechanisms within the composite hinder the understanding of its fatigue response.
Nicolas Rozo Lopez, Jiuheng Chen, Christian Hopmann   +2 more
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The effects of unloading on undrained deformation of a kaolin clay under cyclic loading

Soil Dynamics and Earthquake Engineering, 2021
Abstract Excavation induced unloading may induce additional shear stress in soils. Such additional shear stress or unloading history may affect the long-term deformation of soft clay under subsequent cyclic loadings. A series of undrained cyclic triaxial tests were performed on a kaolin clay to study unloading effect on cyclic behaviour of the soil ...
Zhiyong Liu, Jianfeng Xue, Mohammadjavad Yaghoubi   +2 more
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Initial anisotropy in demineralized bovine cortical bone in compressive cyclic loading–unloading

Materials Science and Engineering: C, 2013
The mechanical properties of demineralized bovine cortical femur bone were investigated by cyclic loading-unloading compression in three anatomical directions (longitudinal, radial, transverse) within the physiological strain range. The loading responses in the radial and transverse directions were nearly linear up to 2% strain, while the response in ...
Ekaterina, Novitskaya, Steve, Lee, Vlado A, Lubarda, Joanna, McKittrick   +3 more
openaire   +2 more sources