Approximate local elasto-plastic solution for notched plates undergoing cyclic tensile loading

Mattos, H.S. da Costa; Filho, Paulo Feliciano Soares

doi:10.1016/j.matdes.2010.03.050

Cited by 13 publications

(5 citation statements)

References 14 publications

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“…The loading-un-loading pressure cycle before burst test might be the possible cause of higher failure pressure value experimentally, when compared with the theoretically determined by ISO/TS 24817 standard. A notched pipe specimen material exhibit hysteresis and shakedown during loading-unloading cycles, and it can eventually improve the pipe strength in a subsequent burst test [39]. So this should be taken into consideration while the failure pressure limit of the metallic pipe repair system.…”

Section: Methodsmentioning

confidence: 99%

Assessment of failure pressure of a GFRP composite repair system for wall loss defect in metallic pipelines

Budhe

Barros

Rohem³

2018

Materialwissenschaft Werkst

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The present paper is concerned with the failure pressure assessment of a newly developed GFRP matrix laminated composite repair of metallic pipelines with 80 % wall loss defect. The main motivation is to validate the experimental failure pressure with the theoretical one. Wall loss defects were manufactured into the tube specimen and the performance of the repaired pipe was assessed by hydrostatic tests as per ISO/TS 24817 standard. Results reveal that the theoretical failure pressure as per ISO/TS 24817 standard is found to be conservative. A wide range of failure pressure values was obtained using different criteria. Only RSTRENG 0.85* modified criterion provides a closer value towards the experimental one. However, the criterion selection for damage factor and flow stress condition is an open question as it gives dispersed values of failure pressure. The prediction of the failure pressure must be accurate without being overly conservative. Plastic deformation of the tube occurs towards the end of the tube, consequently, it is necessary to account for this behavior in failure pressure analysis for an accurate prediction. The application of loading‐unloading cycles before the failure burst test should be also accounted in order to predict the failure pressure.

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Section: Methodsmentioning

confidence: 99%

Assessment of failure pressure of a GFRP composite repair system for wall loss defect in metallic pipelines

Budhe

Barros

Rohem³

2018

Materialwissenschaft Werkst

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“…are positive constants that characterize the plastic behaviour of the material and they can be obtained from a simple tension-compression test [14]. 1 is the identity tensor, and trðA Þ is the trace of an arbitrary tensor A .…”

Section: Summary Of the Elasto-plastic Constitutive Equationsmentioning

confidence: 99%

“…Using definition (14) and Eq. (19) it is possible to obtain the following equivalent expressions for the von Mises equivalent stress …”

Section: Summary Of the Elasto-plastic Constitutive Equationsmentioning

confidence: 99%

Ratcheting behaviour of elasto-plastic thin-walled pipes under internal pressure and subjected to cyclic axial loading

Mattos

Peres

Melo

2015

Thin-Walled Structures

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“…The results successfully predict low-cycle fatigue and can deal with regular cycles. Also, Da Costa Mattos et al [9] have investigated simple methodology to estimate the inelastic stress and strain histories at the root of the notch of a thin elasto-plastic plate undergoing any complex non-monotonic tensile loading. For this, a constitutive theory that accounts for the hardening effects induced by cyclic plasticity is considered.…”

Section: Introductionmentioning

confidence: 99%

The ratcheting behavior of carbon steel piping elbows under cyclic bending moment and temperature

Zakavi

Aghaei

2020

J Braz. Soc. Mech. Sci. Eng.

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In this paper, the effect of temperature and out-of-plane dynamic moments on ratcheting behavior of pressurized elbows have been investigated. The combined hardening model (Chaboche kinematic hardening model with isotropic hardening rule) is used for the plastic analysis of materials. Piping elbow specimens had temperatures of 50, 100, 150 and 200 °C. By using of many tension-compression-stabilized tests of specimens under symmetric strain-controlled, constant parameters for materials are obtained. The results obtained by the FE method of specimens show that the deformations occurred mainly because of creep at high temperature and ratcheting strain by out-of-plane moments. Also, ratcheting rate increases by increasing moment bending and temperatures. Initial, strain accumulation rate is low, and it increases with the increasing temperatures, which express softening phenomenon due to thermal creep. The strain accumulation is highest along the hoop direction at flanks, similar to results from experimental data without considering temperature effects. The results show that the increase in ratcheting due to high temperature may lead to incontrollable damages to pipework structures. Of course, the prediction of strain accumulation is improved in the presence of isotropic hardening rule. Keywords Ratcheting • Elbow pipe • Out-of-plane bending moment • Temperature • Strain hardening List of symbols b, Q ∞ Materials constants for isotropic hardening 0 Yield stress at zero plastic strain p Plastic stress tensor p

show abstract

Approximate local elasto-plastic solution for notched plates undergoing cyclic tensile loading

Cited by 13 publications

References 14 publications

Assessment of failure pressure of a GFRP composite repair system for wall loss defect in metallic pipelines

Assessment of failure pressure of a GFRP composite repair system for wall loss defect in metallic pipelines

Ratcheting behaviour of elasto-plastic thin-walled pipes under internal pressure and subjected to cyclic axial loading

The ratcheting behavior of carbon steel piping elbows under cyclic bending moment and temperature

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