Stress intensity factor calculation through thermoelastic stress analysis, finite element and RPIM meshless method

Farahani, Behzad V.; Tavares, Paulo J.; Moreira, P.M.G.P.; Belinha, J.

doi:10.1016/j.engfracmech.2017.04.027

Cited by 46 publications

(21 citation statements)

References 43 publications

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“…Different analytical techniques for structural health monitoring were presented by many other researchers [119][120][121][122]. Considering the temperature, Farahani et al [123] determined stress intensity factor of a compact tension specimen in a fatigue crack growth test from Thermoelastic Stress Analysis (TSA). They used advanced discretization techniques in processing the results.…”

Section: Structural Health Monitoring Using Other Approachesmentioning

confidence: 99%

The role of dynamic response parameters in damage prediction

Zai

Khan

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part C:

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This article presents a literature review of published methods for damage identification and prediction in mechanical structures. It discusses ways which can identify and predict structural damage from dynamic response parameters such as natural frequencies, mode shapes, and vibration amplitudes. There are many structural applications in which dynamic loads are coupled with thermal loads. Hence, a review on those methods, which have discussed structural damage under coupled loads, is also presented. Structural health monitoring with other techniques such as elastic wave propagation, wavelet transform, modal parameter, and artificial intelligence are also discussed. The published research is critically analyzed and the role of dynamic response parameters in structural health monitoring is discussed. The conclusion highlights the research gaps and future research direction.

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Section: Structural Health Monitoring Using Other Approachesmentioning

confidence: 99%

The role of dynamic response parameters in damage prediction

Zai

Khan

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…Hence, a computational iterative procedure was implemented to analyse the strain field derived from DIC processing software (VIC 2D 2009 © ). In fact, the algorithm joined the overdeterministic SIF calculation routine with the deformation computation in the vicinity of a straight line in front of the crack under mode I condition, as the procedure described in Farahani et al Regarding mode I, the relative stress was the opening stress, σ yy ; the algorithm was handled using this component. Considering plane problem of a homogeneous isotropic solid, Williams' series expansion for plane stress state was applicable as expressed in Equation …”

Section: Sif Determinationmentioning

confidence: 99%

“…13,14 To evaluate the SIF following the mentioned method, the free stress, dead zone concept was thereby considered. 15 Although several approaches to assess SIFs for dissimilar material behaviours are available, [16][17][18] this contribution primarily aimed at implementing an alternative analytical solution based on the compliance methodology. [9][10][11] The obtained results from the proposed analytical strategy have been compared with the experimental DIC and the supporting numerical analyses.…”

Section: Introductionmentioning

confidence: 99%

Concept of stress dead zone in cracked plates: Theoretical, experimental, and computational studies

Farahani

Eslami

Melo

et al. 2019

Fatigue Fract Eng Mat Struct

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This paper presents a study on stress dead zone implications and its characterization with uniaxial tensile testing on MT polycarbonate plate specimens. To obtain the experimental solution, digital image correlation (DIC) is used. Numerically, based on LEFM, the problem is solved using advanced discretization techniques, finite element, and meshless methods. Considering stress dead zone notion, it aims to determine alternative analytical solution of the SIF. Thus, the compliance method is adopted, which is associated with the specimen's dead zone region that does not involve the cracking resistance. Hence, LEFM formulations complying with strain energy release rate criterion are assumed. A proper comparison is made amongst results obtained from all theoretical, experimental, and numerical analyses. Furthermore, this work focuses on the variational fields' evaluation and, in particular, verification on the theoretical assumption of dead zone characteristics. The obtained results support adopted methodologies and are encouragingly robust and cost‐effective.

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“…Using radial basis functions (RBF) as trial functions, RPIM is robust for irregular nodal distributions. The RPIM has been successfully used to solve many problems [37][38][39][40][41]. In addition, some improved RPIMs and coupling technologies based on RPIM have emerged [42][43][44][45].…”

Section: Introductionmentioning

confidence: 99%

An Improved 2D Meshfree Radial Point Interpolation Method for Stress Concentration Evaluation of Welded Component

et al. 2020

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The study of characterizing the stress concentration effects at welds is one of the most important research directions for predicting the fatigue life of welded components. Stress solutions at the weld toe obtained from conventional meshfree methods are strongly influenced by parameters used in the methods as a result of stress singularity. In this study, an improved 2D meshfree radial point interpolation method (RPIM) is proposed for stress concentration evaluation of a welded component. The stress solutions are insensitive to parameters used in the improved RPIM. The improved RPIM-based scheme for consistently calculating stress concentration factor (SCF) and stress intensity factor at weld toe are presented. Our studies provide a novel approach to apply global weak-form meshfree methods in consistently computing SCFs and stress intensity factors at welds.

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Stress intensity factor calculation through thermoelastic stress analysis, finite element and RPIM meshless method

Cited by 46 publications

References 43 publications

The role of dynamic response parameters in damage prediction

The role of dynamic response parameters in damage prediction

Concept of stress dead zone in cracked plates: Theoretical, experimental, and computational studies

An Improved 2D Meshfree Radial Point Interpolation Method for Stress Concentration Evaluation of Welded Component

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