A study on the damage evolution of P91 steel under cyclic loading at high temperature

Saad, Abdullah Aziz; Bachok, Zuraihana; Sun, Wei

doi:10.15282/ijame.13.3.2016.3.0293

Cited by 2 publications

(1 citation statement)

References 17 publications

(20 reference statements)

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“…Creep is the permanent deformation and inelastic response of materials loaded with constant applied stress and a high temperature with a time function dependence [1,2]. The main cause of metal creep failure is nucleation, which is the growth and coalescence of cavities on the grain boundaries [3][4][5]. By modelling the behaviour of materials in a constitutive equation, the formation of the void, void growth, coalescence, micro-crack and crack propagation can be predicted mathematically.…”

Section: Introductionmentioning

confidence: 99%

Characterisation of creep behaviour using the power law model in copper alloy

Ahmad¹,

Curiel-Sosa²,

Rongong³

2017

J. MECH. ENG. SCI.

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This paper presents a numerical strategy for the characterisation of the creep behaviour model of the copper alloy, which is widely used in aircraft applications under creep conditions. The high possibility of the material failing, while operating under load at an elevated temperature, has led to the important study of the creep lifetime prediction analysis, by presenting the Norton's rule based on the Power-law model to describe the secondary creep behaviour of the material. In order to demonstrate the nature of the creep formulation, the SOL 400 modules from MSC Nastran 2014 are implemented in order to conduct the uniaxial tensile test in 2000 N of applied load and 473 K of temperature condition. As a result, the exponential curve is formed from the relationship of the creep strain rate and stress, with a 5.1% error based on the value of the stress exponent, n, between the simulation and experimental results and this was still be acceptable because it was relatively small due to the formulation in the simulation. Consequently, a relation of the creep rate curve can then be plotted with respect to the load steps and the variation patterns due to the stress factor also being discussed. Therefore, the results show a good agreement, which indicates the capability of this model to give an accurate and precise estimation of the secondary creep behaviour of the materials.

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Section: Introductionmentioning

confidence: 99%

Characterisation of creep behaviour using the power law model in copper alloy

Ahmad¹,

Curiel-Sosa²,

Rongong³

2017

J. MECH. ENG. SCI.

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show abstract

Thermal stability analysis of functionally graded plates using simple refined plate theory

Bouazza¹,

Boucheta²,

Becheri³

et al. 2017

Int. J. Automot. Mech. Eng.

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The present paper investigates the thermal stability analysis of functionally graded material plates subjected to three types of thermal loadings, namely; uniform temperature rise, linear temperature rise and non-linear temperature rise through the thickness, using a novel simple refined theory. The theory, which has strong similarity with classical plate theory in many aspects, accounts for a quadratic variation of the transverse shear strains across the thickness and satisfies the zero traction boundary conditions on the top and bottom surfaces of the plate without using shear correction factors. Material properties are varied continuously in the thickness direction according to a simple power law distribution. A buckling analysis of a functionally graded plate under there types of thermal loads is carried out and results in closed-form solutions thermal stability analysis of functionally graded plates using simple refined plate theory. The influence of various factors such as gradient index, temperature loads, thickness and aspect ratios are carefully studied. The results are verified with the known data in the literature. This theory is seen to behave well, and the results of the sample problem show good agreement with the literature values as seen from the validation checks.

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A study on the damage evolution of P91 steel under cyclic loading at high temperature

Cited by 2 publications

References 17 publications

Characterisation of creep behaviour using the power law model in copper alloy

Characterisation of creep behaviour using the power law model in copper alloy

Thermal stability analysis of functionally graded plates using simple refined plate theory

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