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Time Effects Relate to Particle Crushing in Granular Materials

Lade, Poul V.

Sands exhibit patterns of time effects different from those observed in clays. It appears that time effects in sand are associated with crushing of particles, and a mechanistic picture of time effects in granular materials is constructed in which time effects depend on particle crushing by static fatigue, interparticle friction, and grain rearrangement. The phenomenon of static fatigue or delayed fracture of individual particles seems to be at the root of time effects in sand. While creep and relaxation are caused by the same underlying phenomenon, it appears that results of creep tests cannot be obtained from results of relaxations tests, and vice versa.

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Time Effects Relate to Particle Crushing in Granular Materials

Lade, Poul V.

Sands exhibit patterns of time effects different from those observed in clays. It appears that time effects in sand are associated with crushing of particles, and a mechanistic picture of time effects in granular materials is constructed in which time effects depend on particle crushing by static fatigue, interparticle friction, and grain rearrangement. The phenomenon of static fatigue or delayed fracture of individual particles seems to be at the root of time effects in sand. While creep and relaxation are caused by the same underlying phenomenon, it appears that results of creep tests cannot be obtained from results of relaxations tests, and vice versa.

Time Effects Relate to Particle Crushing in Granular Materials

Lade, Poul V.

Sands exhibit patterns of time effects different from those observed in clays. It appears that time effects in sand are associated with crushing of particles, and a mechanistic picture of time effects in granular materials is constructed in which time effects depend on particle crushing by static fatigue, interparticle friction, and grain rearrangement. The phenomenon of static fatigue or delayed fracture of individual particles seems to be at the root of time effects in sand. While creep and relaxation are caused by the same underlying phenomenon, it appears that results of creep tests cannot be obtained from results of relaxations tests, and vice versa.

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Title:

Time Effects Relate to Particle Crushing in Granular Materials

Additional title:

Springer Ser.Geomech.,Geoengineer.

Contributors:

Yang, Qiang (editor) / Zhang, Jian-Min (editor) / Zheng, Hong (editor) / Yao, Yangping (editor) / Lade, Poul V. (author)

Published in:

Constitutive Modeling of Geomaterials ; Chapter: 34 ; 265-269

Springer Series in Geomechanics and Geoengineering

Publication date:

2013-01-01

Size:

5 pages

ISBN:

978-3-642-32814-5 , 978-3-642-32813-8

ISSN:

1866-8763 , 1866-8755

DOI:

https://doi.org/10.1007/978-3-642-32814-5_34

Type of media:

Article/Chapter (Book)

Type of material:

Electronic Resource

Language:

English

Keywords:

creep , sand , static fatigue , time effects Engineering , Geoengineering, Foundations, Hydraulics , Geotechnical Engineering & Applied Earth Sciences

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