Linear matching method on the evaluation of plastic and creep behaviours for bodies subjected to cyclic thermal and mechanical loading

Chen, Haofeng; Ponter, A. R. S.

doi:10.1002/nme.1693

Cited by 54 publications

(58 citation statements)

References 13 publications

(45 reference statements)

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“…In order to conclude about the sensitivity of creep-fatigue strength to a variation of ρ, the Eqs (19) - (21) for N ⋆ (M, ∆t, ρ) are applied to create a set of contour plots shown in Fig. 11.…”

Section: Discussionmentioning

confidence: 99%

On creep-fatigue endurance of TIG-dressed weldments using the linear matching method

Gorash

Chen

2013

Engineering Failure Analysis

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This version is available at https://strathprints.strath.ac.uk/44578/ Strathprints is designed to allow users to access the research output of the University of Strathclyde. Unless otherwise explicitly stated on the manuscript, Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Please check the manuscript for details of any other licences that may have been applied. You may not engage in further distribution of the material for any profitmaking activities or any commercial gain. You may freely distribute both the url (https://strathprints.strath.ac.uk/) and the content of this paper for research or private study, educational, or not-for-profit purposes without prior permission or charge.Any correspondence concerning this service should be sent to the Strathprints administrator: strathprints@strath.ac.ukThe Strathprints institutional repository (https://strathprints.strath.ac.uk) is a digital archive of University of Strathclyde research outputs. It has been developed to disseminate open access research outputs, expose data about those outputs, and enable the management and persistent access to Strathclyde's intellectual output.On creep-fatigue endurance of TIG-dressed weldments using the linear matching method AbstractThis paper is devoted to parametric study on creep-fatigue endurance of the steel type 316N(L) weldments at 550 • C identified as type 3 according to R5 Vol. 2/3 procedure classification. The study is implemented using a direct method known as the Linear Matching Method (LMM) and based upon the creep-fatigue evaluation procedure considering time fraction rule for creep-damage assessment. Seven configurations of the weldment, characterised by particular values of a geometrical parameter ρ, are proposed. Parameter ρ, which represents different grades of TIG dressing, is a ratio between the radius of the fillet of the remelted metal on a weld toe and the thickness of welded plates. For each configuration, the total number of cycles to failure N ⋆ in creep-fatigue conditions is assessed numerically for different loading cases defined by normalised bending momentM and dwell period ∆t. The obtained set of N ⋆ is extrapolated by the analytic function dependent onM, ∆t and parameter ρ. Proposed function for N ⋆ shows good agreement with numerical results obtained by the LMM. Therefore, it is used for the identification of Fatigue Strength Reduction Factors (FSRFs) effected by creep, which are intended for design purposes, and dependent on ∆t and ρ.

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Section: Discussionmentioning

confidence: 99%

On creep-fatigue endurance of TIG-dressed weldments using the linear matching method

Gorash

Chen

2013

Engineering Failure Analysis

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“…When creep is present, the structure's response to a cyclic loading condition changes dramatically [4][5][6], with respect to the low temperature case. Due to the induced residual stresses by creep and plasticity, a closed stress strain cycle may be formed when the reverse plastic strains completely recover the inelastic strain created during loading and creep dwell periods.…”

Section: Introductionmentioning

confidence: 99%

“…The LMM has been recently extended for the evaluation of fatigue creep interaction and validated by [4,5] and further used for a more practical application, i.e. creep fatigue life assessment of weldment [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Creep-fatigue behaviour of aluminum alloy-based metal matrix composite

Barbera¹,

Chen²,

Liu

2016

International Journal of Pressure Vessels and Piping

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Metal Matrix Composite (MMC) represents a valuable option as structural material for different type of structures and components. Despite this they struggle to become widely adopted due to expensive manufacturing process and complex microstructural behaviour. When subjected to cyclic load conditions the structural response of MMC is not trivial, and becomes even more difficult when high temperature load is involved. Different failure mechanisms would happen and they are originated by the different material properties between the fibre and surrounding matrix. Among all, the mismatch of thermal expansion coefficient is recognized to be the dominant one. The significantly differing coefficients of thermal expansion between ceramic and metal give rise to micro thermal stresses, which enhance the initiation of matrix micro cracks. Their performance under varying load and high temperature is complex, and hence it is difficult to have a clear understanding of the structural responses, especially when fatigue and creep damages become the main failures of MMCs. To improve current understanding of the relationship between creep fatigue interaction of MMCs, the history of thermal and mechanical loading, and the creep dwell period, a highly accurate but robust direct simulation technique on the basis of the Linear Matching Method (LMM) framework has been proposed in this paper, and been applied to model the fatigue and creep behaviour of MMCs. A homogenised FE model is considered in all analyses, which consist of continuous silicon carbide fibres embedded in a square 2024T3 aluminium alloy matrix array. Various factors that affect creep and fatigue behaviours of composites are analysed and discussed, including effects of the applied load level, dwell period and temperature on the MMC's performance. The effects of reversed plasticity on stress relaxation and creep deformation of MMC are investigated, and the behaviours of cyclically enhanced creep and elastic followup are presented. A detailed study of the creep ratchetting mechanism is also performed with the concentration on the impact of temperature and different loading conditions. The accuracy of the proposed method has been verified by detailed incremental finite element analyses using the commercial finite element solver Abaqus. Such verifications further improve the understanding of the failure mechanisms identified and discussed in this work.

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“…The LMM is distinguished from other simplified methods by ensuring that equilibrium and compatibility are satisfied at each stage. In addition to the shakedown analysis method [12], the LMM has been extended beyond the range of most other direct methods by including the evaluation of ratchet limit and plastic strain range [9,10,13] and high temperature material behaviour [14]. The new ratchet limit method [13] has been verified to be capable of evaluating the ratchet limit and plastic strain range for defect-free components subjected to cyclic load conditions involving multi-load extremes.…”

Section: Introductionmentioning

confidence: 99%

Effect of circular holes on the ratchet limit and crack tip plastic strain range in a centre cracked plate

Chen¹,

Chen²,

Li³

et al. 2011

Engineering Fracture Mechanics

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This version is available at https://strathprints.strath.ac.uk/31452/ Strathprints is designed to allow users to access the research output of the University of Strathclyde. Unless otherwise explicitly stated on the manuscript, Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Please check the manuscript for details of any other licences that may have been applied. You may not engage in further distribution of the material for any profitmaking activities or any commercial gain. You may freely distribute both the url (https://strathprints.strath.ac.uk/) and the content of this paper for research or private study, educational, or not-for-profit purposes without prior permission or charge.Any correspondence concerning this service should be sent to the Strathprints administrator: strathprints@strath.ac.ukThe Strathprints institutional repository (https://strathprints.strath.ac.uk) is a digital archive of University of Strathclyde research outputs. It has been developed to disseminate open access research outputs, expose data about those outputs, and enable the management and persistent access to Strathclyde's intellectual output. 1Effect of circular holes on the ratchet limit and crack tip plastic strain range in a centre cracked plate Haofeng Chen * , Weihang Chen, Tianbai Li, James UreDepartment of Mechanical Engineering, University of Strathclyde, Glasgow, G1 1XJ, UK Abstract: In this paper a centre cracked plate subjected to cyclic tensile loading and cyclic bending moment is considered. The effect of circular holes drilled in the region of the crack tip on the ratchet limit and crack tip plastic strain range is studied. Direct evaluation of the ratchet limit and crack tip plastic strain range is solved by employing the new Linear Matching Method (LMM).Parametric studies involving hole diameter and location are investigated. The optimum hole location for reducing the crack tip plastic strain range with the least reduction in ratchet limit is identified, and located at a distance 10% of the semi-crack length from the crack tip on the side opposite the ligament for both cyclic tensile loading and cyclic bending moment cases. It is also observed that the optimum location is independent of the hole size for both cyclic loading cases.

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Linear matching method on the evaluation of plastic and creep behaviours for bodies subjected to cyclic thermal and mechanical loading

Cited by 54 publications

References 13 publications

On creep-fatigue endurance of TIG-dressed weldments using the linear matching method

On creep-fatigue endurance of TIG-dressed weldments using the linear matching method

Creep-fatigue behaviour of aluminum alloy-based metal matrix composite

Effect of circular holes on the ratchet limit and crack tip plastic strain range in a centre cracked plate

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