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Titolo:
Analytical simulation of the dynamic compressive strength of a granite using the sliding crack model
Autore:
Li, HB; Zhao, J; Li, TJ; Yuan, JX;
Indirizzi:
Chinese Acad Sci, Inst Rock & Soil Mech, Wuhan 430071, Peoples R China Chinese Acad Sci Wuhan Peoples R China 430071 an 430071, Peoples R China Nanyang Technol Univ, Sch Civil & Struct Engn, Singapore 639789, SingaporeNanyang Technol Univ Singapore Singapore 639789 gapore 639789, Singapore
Titolo Testata:
INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS
fascicolo: 9, volume: 25, anno: 2001,
pagine: 853 - 869
SICI:
0363-9061(20010810)25:9<853:ASOTDC>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
BRITTLE ROCKS; BEHAVIOR; FAILURE; STRESS; MICROMECHANICS; DEFORMATION; DEPENDENCE; GROWTH; TESTS;
Keywords:
analytical simulation; dynamic compressive strength; granite; sliding crack model;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
22
Recensione:
Indirizzi per estratti:
Indirizzo: Li, TJ Chinese Acad Sci, Inst Rock & Soil Mech, Wuhan 430071, Peoples R China Chinese Acad Sci Wuhan Peoples R China 430071 71, Peoples R China
Citazione:
H.B. Li et al., "Analytical simulation of the dynamic compressive strength of a granite using the sliding crack model", INT J NUM A, 25(9), 2001, pp. 853-869

Abstract

A sliding crack model is employed to simulate rock strength under dynamic compression. It is assumed that the growth and nucleation of a sliding crack array presented results in the shear fault failure and dominate the mechanical properties of rock material. The pseudo-tractions method is used to calculate the stress intensity factor of the sliding crack array under compression. With the utilization of a dynamic crack growth criterion, the growth of the sliding crack array is studied and the simulated strengths of a granite under dynamic compression are correspondingly obtained. It is concluded that the simulated rock strengths increase with increasing strain rates at different confining pressures, and the rising rates have a trend to decrease with increasing confining pressures. It is also indicated that the simulated rock strengths increase with increment of confining pressure at different strain rates, and the rising rates are almost identical at different strain rates. The simulation results are validated by the experimental datafor the granite. Copyright (C) 2001 John Wiley & Sons, Ltd.

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Documento generato il 04/12/20 alle ore 12:10:39