Crack Propagation in Various Double Cantilever Beam Geometric Configurations

Malíková, Lucie; Šimonová, Hana

doi:10.1007/978-981-13-0411-8_16

Cited by 1 publication

(2 citation statements)

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“…This variation of fracture behaviour has then been linked to the geometrical constraints that would be numerically captured by the use of higher order terms of stress series around the crack/notch. [14][15][16][17][18] On this basis, generalized formulations of MTS and SED criteria were proposed by Ayatollahi et al 14,19,20 by taking into account the first nonsingular term of the stress field near the crack tip. They showed that the new criteria named generalized MTS (GMTS) and generalized SED (GSED), respectively, provide considerably more accurate predictions of fracture loads and trajectory than the classical counterparts.…”

Section: Introductionmentioning

confidence: 99%

“…The results of several studies for the cracked specimens have shown that there are considerable differences in the experimentally obtained values of fracture loads and fracture initiation angle under mode I loading condition from a pre‐existed crack tip. This variation of fracture behaviour has then been linked to the geometrical constraints that would be numerically captured by the use of higher order terms of stress series around the crack/notch 14–18 …”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Geometry effects on mode I brittle fracture in U‐notched specimens

Bahadori

Ayatollahi

Razavi

et al. 2020

Fatigue Fract Eng Mat Struct

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The effects of geometrical constraints on the fracture initiation location and the fracture strength are evaluated in U‐notched specimens using theoretical and experimental analyses. It is proven that high geometrical constraints in pure mode I loading of geometrically symmetric U‐notched specimens can result in occurrence of the maximum tangential stress (MTS) at two symmetric points on both sides of the notch bisector line. The experiments also indicated that the fracture takes place from a direction that is not along the notch bisector line. The experimental results are then examined theoretically through a stress‐based brittle fracture criterion. Because the conventional MTS criterion was poor to predict the onset of fracture properly, an attempt is made to use the generalized MTS (GMTS) criterion by considering the higher order terms in the fracture model. It is shown that the GMTS criterion gives very good predictions for experimentally obtained values of crack initiation angle and notch fracture resistance.

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