Results 31 to 40 of about 7,162,232 (286)

Comparison of epoch and uniaxial versus triaxial accelerometers in the measurement of physical activity in preschool children : a validation study [PDF]

, 2012
The objectives of this Study were to explore whether triaxial is more accurate than uniaxial accelerometry and whether shorter sampling periods (epochs) are more accurate than longer epochs. Physical activity data from uniaxial and triaxial (RT3) devices
Bulley, Catherine, Hislop, Jane F., Mercer, Tom H., Reilly, John J   +3 more
core   +4 more sources

Undrained response of Sydney sand under non-reversal cyclic loading [PDF]

E3S Web of Conferences, 2019
Stress history and loading path can significantly influence the cyclic response of sands. It is well known that cyclic behaviour under non-symmetrical cycling is generally different from that under symmetrical loading around zero deviator stress ...
Mohammadi Amirabbas, Airey David
doaj   +1 more source

Long-Term Cyclic Triaxial Tests With Dem Simulations

PARTICLES 2017, V International Conference on Particle-based Methods – Fundamentals and Applications, 2017
The present paper presents the capability of Discrete Element Method (DEM) to simulate a long-term cyclic drained triaxial test (up to 100,000 cycles). The results regard the progressive accumulation of plastic strain as function of the number of particles and the initial particles rearrangement.
Zorzi, Gianluca, Kirsch, Fabian, Gabrieli, Fabio, Rackwitz, Frank   +3 more
openaire   +4 more sources

Evaluation and Comparison of two Frequently Used Cyclic Constitutive Models for Sandy Soils [PDF]

مدل‌سازی پیشرفته در مهندسی عمران
Selection of an appropriate soil constitutive model for advanced numerical analyses requires thorough understanding of behavior of constitutive models. Here, SANISAND and HS-SMALL models which are advanced widely available soil models for cyclic behavior
Hossein Javaheri Koupaei, Samad Choobi
doaj   +1 more source

Experimental Study on Seismic Compression of Chinese Loess under Cyclic Direct Simple Shear Testing

Advances in Civil Engineering, 2022
Seismic compression is the accumulation of contractive volumetric strains in unsaturated soil from earthquake shaking. For Chinese loess, the behavior of seismic compression is extremely significant and has been recognized in historical earthquakes. As a
Qiang Wang, Zhe Zhang, Shengjun Shao, Qian Yang   +3 more
doaj   +1 more source

A Bayesian Framework for the Calibration of Cyclic Triaxial Tests

Geotechnics
This research presents the calibration of a constitutive model to replicate the cyclic performance of soils using a Bayesian framework. This study uses data from laboratory-conducted consolidated undrained isotropic cyclic triaxial tests and numerical tools to estimate optimal parameters by the application of Slice Sampling in a Bayesian analysis and ...
Castillo Suarez, Luis, Redondo Mosquera, Jesús, Mercado, Vicente, Fernández Gómez, Jaime Antonio, Abellán García, Joaquín   +4 more
openaire   +2 more sources

Predicting resilient modulus: A data driven approach integrating physical and numerical techniques

Heliyon
Resilient modulus (MR) is an important parameter in the design of pavement that helps to characterize the quality of sub-grade materials. Generally, it is not determined experimentally due to time consuming, uneconomical, laborious and lack of advanced ...
Kashif Riaz, Naveed Ahmad
doaj   +1 more source

Research on micro-influence mechanism of fine particles on dynamic characteristics of graded macadam materials in heavy-haul railway subgrade beds

Case Studies in Construction Materials, 2023
Fine particle content is an important physical state parameter of graded macadam materials used in heavy-haul railway subgrade beds. Understanding the micro-influence mechanism of the fine particle content on the filler’s dynamical characteristics is of ...
Zhihao Yang, Siaw Ackah Frank, Huaiping Feng, Shaohua Li   +3 more
doaj   +1 more source

Energy evolution and damage analysis of true triaxial cyclic loading and unloading of sandstone at different rates

Meitan xuebao
To investigate the effects of different rates on the energy and damage evolution of sandstone during true triaxial cyclic loading and unloading damage, the true triaxial compression test, true triaxial primary loading and unloading test, and true ...
Qihang ZHANG, Xiangrui MENG, Guangming ZHAO, Wensong XU, Chongyan LIU, Zhixi LIU, Xukun WU, Minjie QI   +7 more
doaj   +1 more source

Constitutive modelling of the behaviour of clays under cyclic loading [PDF]

, 1989
Includes bibliography.This research work involved the implementation of a constitutive model based on plasticity theory to model the behaviour of a clay under cyclic loading.
Sellers, E J
core   +1 more source