The development of stress in inclusions caused by plastic flow in the matrix of a two-phase composite and its effect on the relief of initial residual stress

John R. Griffiths; Cameron J Davidson; Trevor R. Finlayson; Ed C. Oliver; Qigui Wang; Michael E. Fitzpatrick

The development of stress in inclusions caused by plastic flow in the matrix of a two-phase composite and its effect on the relief of initial residual stress

John R. Griffiths, Cameron J Davidson, Trevor R. Finlayson, Ed C. Oliver, Qigui Wang, Michael E. Fitzpatrick

Faculty of Engineering, Environment & Computing

Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding

Abstract

Stresses in the particles of two-phase composites are caused by particle/matrix differences in the coefficients of thermal expansion, elastic moduli and yield stress. The three types of stress are designated as σ^th, σ^el and σ^pl, respectively. When the matrix is strained plastically in uniaxial tension the thermal stress, σ^th, is relieved but this relief is counteracted by the development of σ^pl. It has proved experimentally difficult in the past to deconvolute the two effects. We show how this difficulty can be overcome by making measurements at a suitable elevated temperature and we also give an example of how the two effects interact at lower temperatures.

Original language	English
Title of host publication	8th Australasian Congress on Applied Mechanics, ACAM 2014, as Part of Engineers Australia Convention 2014
Publisher	Engineers Australia
Pages	788-795
Number of pages	8
ISBN (Electronic)	9781922107350
ISBN (Print)	9781510802674
Publication status	Published - 1 Nov 2014
Event	8th Australasian Congress on Applied Mechanics, ACAM 2014, as Part of Engineers Australia Convention 2014 - Melbourne, Australia Duration: 25 Nov 2014 → 26 Nov 2014

Conference

Conference	8th Australasian Congress on Applied Mechanics, ACAM 2014, as Part of Engineers Australia Convention 2014
Country	Australia
City	Melbourne
Period	25/11/14 → 26/11/14

Keywords

Composites
Plasticity stress
Stress relief

ASJC Scopus subject areas

Mechanical Engineering
Mechanics of Materials

Access to Document

Link to publication in Scopus

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Cite this

Griffiths, J. R., Davidson, C. J., Finlayson, T. R., Oliver, E. C., Wang, Q., & Fitzpatrick, M. E. (2014). The development of stress in inclusions caused by plastic flow in the matrix of a two-phase composite and its effect on the relief of initial residual stress. In 8th Australasian Congress on Applied Mechanics, ACAM 2014, as Part of Engineers Australia Convention 2014 (pp. 788-795). Engineers Australia.

The development of stress in inclusions caused by plastic flow in the matrix of a two-phase composite and its effect on the relief of initial residual stress. / Griffiths, John R.; Davidson, Cameron J; Finlayson, Trevor R.; Oliver, Ed C.; Wang, Qigui; Fitzpatrick, Michael E.

8th Australasian Congress on Applied Mechanics, ACAM 2014, as Part of Engineers Australia Convention 2014. Engineers Australia, 2014. p. 788-795.

Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding

Griffiths, JR, Davidson, CJ, Finlayson, TR, Oliver, EC, Wang, Q & Fitzpatrick, ME 2014, The development of stress in inclusions caused by plastic flow in the matrix of a two-phase composite and its effect on the relief of initial residual stress. in 8th Australasian Congress on Applied Mechanics, ACAM 2014, as Part of Engineers Australia Convention 2014. Engineers Australia, pp. 788-795, 8th Australasian Congress on Applied Mechanics, ACAM 2014, as Part of Engineers Australia Convention 2014, Melbourne, Australia, 25/11/14.

Griffiths JR, Davidson CJ, Finlayson TR, Oliver EC, Wang Q, Fitzpatrick ME. The development of stress in inclusions caused by plastic flow in the matrix of a two-phase composite and its effect on the relief of initial residual stress. In 8th Australasian Congress on Applied Mechanics, ACAM 2014, as Part of Engineers Australia Convention 2014. Engineers Australia. 2014. p. 788-795

Griffiths, John R. ; Davidson, Cameron J ; Finlayson, Trevor R. ; Oliver, Ed C. ; Wang, Qigui ; Fitzpatrick, Michael E. / The development of stress in inclusions caused by plastic flow in the matrix of a two-phase composite and its effect on the relief of initial residual stress. 8th Australasian Congress on Applied Mechanics, ACAM 2014, as Part of Engineers Australia Convention 2014. Engineers Australia, 2014. pp. 788-795

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abstract = "Stresses in the particles of two-phase composites are caused by particle/matrix differences in the coefficients of thermal expansion, elastic moduli and yield stress. The three types of stress are designated as σth, σel and σpl, respectively. When the matrix is strained plastically in uniaxial tension the thermal stress, σth, is relieved but this relief is counteracted by the development of σpl. It has proved experimentally difficult in the past to deconvolute the two effects. We show how this difficulty can be overcome by making measurements at a suitable elevated temperature and we also give an example of how the two effects interact at lower temperatures.",

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