Effect of slow dynamics on elastic properties of materials with residual and shear strains

被引：21

作者：

Korobov, A. I. ^{[1
]}

Odina, N. I. ^{[1
]}

Mekhedov, D. M. ^{[1
]}

机构：

[1] Moscow MV Lomonosov State Univ, Fac Phys, Moscow 119991, Russia

来源：

ACOUSTICAL PHYSICS | 2013年 / 59卷 / 04期

基金：

俄罗斯基础研究基金会;

关键词：

mesoscale inhomogeneities; defect structure; structural nonlinearity; fast and slow dynamics effects; nonlinear resonance ultrasonic spectroscopy; CHARACTERISTIC FEATURES; WAVES; MODEL;

D O I：

10.1134/S106377101304009X

中图分类号：

O42 [声学];

学科分类号：

070206 [声学];

摘要：

The effects of fast and slow dynamics in acoustic resonators from rock and metal samples from the D16 microcrystalline aluminum alloy are studied using resonance ultrasonic spectroscopy. Before the experiment, residual shear strains were artificially created in the metal samples. A decrease in the elasticity modulus in the fast dynamics process has been revealed in resonators from rock and the D16 alloy with residual strains. Based on an analysis of the experimental results, the following conclusion was drawn: the experimentally observed slow dynamics effect cannot be explained by thermoelastic effects alone. The slow dynamics effect is to a great extent related to metastable states of the defect structure the latter passes through to due to the force action (dynamic or static) applied to the sample. After its removal, the defect structure slowly relaxes to its equilibrium state.

引用

页码：387 / 392

页数：6

共 27 条

[1]

[Anonymous], 1991, PHYS VALUES HDB

[2]

[Anonymous], THEORETICAL PHYS

[3]

Observation of slow dynamics effects in nonconsolidated media under in situ conditions [J].

Averbakh, V. S. ;

Lebedev, A. V. ;

Maryshev, A. P. ;

Talanov, V. I. .

ACOUSTICAL PHYSICS, 2009, 55 (02) :211-217

[4]

Hysteretic elasticity in damaged concrete: Quantitative analysis of slow and fast dynamics [J].

Bentahar, M ;

El Aqra, H ;

El Guerjouma, R ;

Griffa, M ;

Scalerandi, M .

PHYSICAL REVIEW B, 2006, 73 (01)

[5]

Delsanto P.P., 2006, UNIVERSALITY NONCLAS

[6]

Modeling nonclassical nonlinearity, conditioning, and slow dynamics effects in mesoscopic elastic materials [J].

Delsanto, PP ;

Scalerandi, M .

PHYSICAL REVIEW B, 2003, 68 (06)

[7]

GEDROITS AA, 1963, DOKL AKAD NAUK SSSR+, V150, P515

[8]

Gurbatov S.N., 2008, WAVES STRUCTURES NON

[9]

Hysteresis and the dynamic elasticity of consolidated granular materials [J].

Guyer, RA ;

TenCate, J ;

Johnson, P .

PHYSICAL REVIEW LETTERS, 1999, 82 (16) :3280-3283

[10]

Nonlinear mesoscopic elasticity: Evidence for a new class of materials [J].

Guyer, RA ;

Johnson, PA .

PHYSICS TODAY, 1999, 52 (04) :30-36

← 1 2 3 →