A Photoelastic Study for Multiparametric Analysis of the Near Crack Tip Stress Field Under Mixed Mode Loading

Stepanova, L. V.; Pavel, Roslyakov; Pavel, Lomakov

doi:10.1016/j.prostr.2016.06.226

Cited by 23 publications

(4 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The photoelastic fringe pattern has been used in previous research to experimentally estimate the stress intensity factor and indicate the need of the inclusion of non-singular terms in the estimation of the stress intensity factor in homogeneous specimens of varying sizes and configurations [25][26][27][28]. In porous materials, due to the widely irregular nature of the fringe pattern, the coefficients of the Williams series cannot be extracted.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Experimental and numerical analysis of size effects on stress intensity in anisotropic porous materials

Touliatou

Wheel

2019

Engineering Failure Analysis

View full text Add to dashboard Cite

A prominent size effect has previously been reported for the fracture behaviour of brittle porous materials, with smaller specimens behaving quite differently to their larger counterparts. In such materials, the size of the K-dominant zone has been numerically found to be greatly affected by the presence of voids in the near-tip area, thus putting the assumption of a single fracture parameter under question. In order to address this, in this study mode I tests are conducted on porous double cantilever beam specimens, while the stress distribution in the near-tip area is being observed by means of photoelasticity. Results validate the predicted size effect and suggest that the voids can indeed alter the size and shape of the stress pattern in the specimens. A parametric study is then conducted to investigate the influence of void shape variations that can be caused by manufacturing inaccuracies on the stress concentration at the crack tip. It is found that although the stress intensity at the crack tip can be greatly affected by such factors, the size of the K-dominant zone remains unaffected.

show abstract

Section: Resultsmentioning

confidence: 99%

“…The importance of the non-singular stresses in brittle materials can also be visually identified by observing the near-tip stress field by means of photoelasticity [25][26][27][28][29]. For homogeneous specimens, the photoelastic fringe pattern under mode I loading follows a concentric ellipsoidal pattern, originating at the crack tip.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical analysis of size effects on stress intensity in anisotropic porous materials

Touliatou

Wheel

2019

Engineering Failure Analysis

View full text Add to dashboard Cite

show abstract

“…Therefore, in the singular dominant zone the first terms are sufficient to characterize the crack tip fields. However, at further distances from the crack tip, the importance of the higher order terms become evident [6][7][8][9][10][11]. Thus, precise and simple algorithms are needed to reliably calculate coefficients in the multi-parameter crack-tip fields.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, precise and simple algorithms are needed to reliably calculate coefficients in the multi-parameter crack-tip fields. Numerical methods and in particular finite element method (FEM) [6][7][8][9][10][11] allow us to extract the crack tip parameters. Moreover, it is worth noting that even determining the stress in-tensity factor is still the subject of investigations.…”

Section: Introductionmentioning

confidence: 99%

Extraction of Fracture Mechanics Parameters From Fem Analysis: Algorithms and Procedures

Бахарева¹,

Bakhareva

Миронов³

et al. 2020

Vestnik of Samara University. Natural Science Series

View full text Add to dashboard Cite

The paper describes new algorithms and procedures proposed for determining fracture mechanicsparameters from finite element analysis using the over deterministic method. The multi-parameter cracktip stress field description is used. The algorithms and procedures based on multi-parameter stress fieldrepresentations in series form are shown to be a powerful tool for reliable and accurate parameterdetermination. The technique is aimed at the determination of coefficients of the Williams series expansionfrom finite element analysis and is based on the over deterministic approach. The methodology is illustratedand applied to several cases of cracked specimens. Examples are presented for crack-tip fields recorded usingdigital photoelasticity. The results of finite element analysis are compared with the digital photoelasticityexperiments. The results are in good agreement. The principal stresses obtained from finite element methodare in good agreement with the isochromatic fringe patterns obtained by the photoelasticity method.Explanation has been made for giving guidance to a user on how best to approach implementation of themethod from a practical standpoint.

show abstract

Effect of a Micro-crack on the Edge Macro-crack Propagation Rate and Path Under Mixed Loads

Jiang

2019

Acta Mech. Solida Sin.

View full text Add to dashboard Cite

A Photoelastic Study for Multiparametric Analysis of the Near Crack Tip Stress Field Under Mixed Mode Loading

Cited by 23 publications

References 23 publications

Experimental and numerical analysis of size effects on stress intensity in anisotropic porous materials

Experimental and numerical analysis of size effects on stress intensity in anisotropic porous materials

Extraction of Fracture Mechanics Parameters From Fem Analysis: Algorithms and Procedures

Effect of a Micro-crack on the Edge Macro-crack Propagation Rate and Path Under Mixed Loads

Contact Info

Product

Resources

About