Results 11 to 20 of about 1,395,416 (247)

Stiffness in human joints [PDF]

open access: yes, 1993
Articular stiffness is an important symptom in most arthritic diseases and appears to be a useful marker of disease activity in rheumatoid arthritis.
Helliwell, Philip Stephen
core   +6 more sources

Assessing the Role of Longitudinal Variability of Vertical Track Stiffness in the Long-Term Deterioration [PDF]

open access: yes, 2016
The performance of the railway system in terms of dynamic loading is depending mainly on the track support conditions. Usually, the track stiffness is used as the main parameter to describe the support conditions and is defined as the ratio of the load ...
Ramos Andrade, Antonio   +2 more
core   +3 more sources

Research on the Estimation Method of the Stiffness Degeneration Index of Reinforced Concrete Members

open access: yesAdvances in Civil Engineering, 2020
Based on variable amplitude displacement cycle tests of 24 reinforced concrete members with different reinforcement conditions, the stiffness degradation index was proposed to describe the damage. The relationship between the stiffness degradation index,
Yukui Wang   +4 more
doaj   +1 more source

The influence of oxidative-thermal degradation of polypropylene on measured interface strength of glass fibre-polypropylene [PDF]

open access: yes, 2010
It was previously found that thermal-oxidative degradation of the polypropylene could significantly affect the measured interfacial strength of glass fibre reinforced polypropylene (GF-PP) micro-composite.
Zhu, W.Z., Yang, Liu, Thomason, J.L.
core   +3 more sources

Mechanical Properties of Dahurian Larch Wood under Cyclic Loading: Experiments and Constitutive Model

open access: yesBuildings, 2023
This article presents a study on the mechanical properties and constitutive model of Dahurian larch wood under parallel-to-grain (ParG) and perpendicular-to-grain (PerG) cyclic loading. A total of twenty-four dog-bone specimens were designed and prepared.
Lipeng Zhang   +4 more
doaj   +1 more source

Stiffness degradation of marine soft clay under monotonic and cyclic loadings

open access: yesYantu gongcheng xuebao, 2020
A series of undrained monotonic and cyclic triaxial tests are conducted on Jiaxing intact marine soft clay by using a testing system combined with triaxial apparatus and bender element to investigate the small strain shear modulus and stiffness ...
LU Su-jie 1, TONG Jun-hao 2, PAN Kun 2, YUAN Zong-hao 2, PAN Xiao-dong 2, SHI Li 2, HE Ben 1
doaj   +1 more source

Cyclic threshold shear strains for pore water pressure generation and stiffness degradation in marine clay

open access: yesYantu gongcheng xuebao, 2023
The cyclic threshold shear strain is a fundamental property of saturated soils under cyclic loading. To investigate the cyclic threshold shear strains for pore water pressure generation (γtp) and stiffness degradation (γtd), a series of strain-controlled
XIAO Xing 1, JI Dongwei 1, HANG Tianzhu 1, WU Qi 1, 2, CHEN Guoxing 1, 2
doaj   +1 more source

Experimental researches on in-situ loading and unloading deformation characteristics of soft soil based on pressuremeter tests in Shanghai area

open access: yesYantu gongcheng xuebao, 2022
The quality of the soft soil includes low strength and high compressibility, and the deformation shows obviously different nonlinear characteristics under different stress states and paths.
ZHANG Han 1, 2, 4, YANG Shi-fei 1, 4, WANG Lin 1, 2, 4, LIN Tian-xiang 3, 4
doaj   +1 more source

Joint Stiffness Identification of a Heavy Kuka Robot with a Low-cost Clamped End-effector Procedure [PDF]

open access: yes, 2014
This paper proposes two new methods for the identification of static stiffnesses of multi degrees of freedom heavy industrial robots. They are based on a locked link joint procedure obtained with an end-effector fixed to the environment. The first method
JUBIEN, Anthony   +5 more
core   +1 more source

Geometry and stiffness optimization for switches and crossings, and simulation of material degradation [PDF]

open access: yes, 2010
A methodology for simulating wear, rolling contact fatigue, and plastic deformation for a mixed traffic situation in switches and crossings (S&C) has been developed.
Kassa, Elias,   +21 more
core   +1 more source

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