Fracture and Structural Integrity e-ISSN 1971-8993 Open access
SI: Characterisation of Crack Tip Fields Vol. 13, No. 49 (2019)

Averaged strain energy density estimated rapidly from the nodal stresses by FEM for cracks under mixed mode loadings including the T-stress contribution

Author and affiliation details
DOI
10.3221/IGF-ESIS.49.06
Pages
53-64
Published
Published inVol. 13, No. 49 (2019)Go to the issue

Abstract

The present contribution reviews a recently proposed method to rapidly estimate the averaged SED at the tip of short as well as long cracks under in-plane I+II and long cracks under out-of-plane I+III mixed mode loadings. Short cracks are distinguished from long cracks by considering that the stress fields within the control volume of short cracks are no longer governed solely by the stress intensity factors (SIFs), but the contribution of higher order terms, and primarily the T-stress, becomes significant to estimate the averaged SED. According to the proposed method, the averaged SED is calculated using the linear elastic nodal stresses evaluated by FEM either at the crack tip, to account for the SIFs contribution, and at selected FE nodes of the crack free edges, to include the T-stress contribution. The advantage of the proposed approach is two-fold: coarse FE meshes can be adopted; moreover, geometrical modelling the control volume is no longer necessary. To validate the approach, cracked plates subjected to in-plane I+II mixed mode loading as well as bars weakened by circumferential outer cracks subjected to out-of-plane mixed mode I+III loading have been analysed. A comparison between approximate values of the averaged SED according to the nodal stress approach and those derived directly from the FE strain energy adopting very refined FE meshes has been successfully performed.

Keywords

Article history

  1. ReceivedUntil the next stage: 6 days
  2. AcceptedUntil the next stage: 31 days
  3. Published

About the authors

Alberto Campagnolo

Assistant Professor

Department of Industrial Engineering

University of Padova

Via Venezia, 1

35131 Padova

Italy

How to cite

APA

Meneghetti, G., Campagnolo, A., & Berto, F. (2019). Averaged strain energy density estimated rapidly from the nodal stresses by FEM for cracks under mixed mode loadings including the T-stress contribution. Fracture and Structural Integrity, 13(49), 53–64. https://doi.org/10.3221/IGF-ESIS.49.06

IEEE

G. Meneghetti, A. Campagnolo, and F. Berto, “Averaged strain energy density estimated rapidly from the nodal stresses by FEM for cracks under mixed mode loadings including the T-stress contribution,” Fracture and Structural Integrity, vol. 13, no. 49, pp. 53–64, 2019, doi: 10.3221/IGF-ESIS.49.06.

MLA

Meneghetti, Giovanni, et al. “Averaged strain energy density estimated rapidly from the nodal stresses by FEM for cracks under mixed mode loadings including the T-stress contribution.” Fracture and Structural Integrity, vol. 13, no. 49, 2019, pp. 53–64. https://doi.org/10.3221/IGF-ESIS.49.06.

Chicago

Meneghetti, Giovanni, Alberto Campagnolo, and Filippo Berto. 2019. “Averaged strain energy density estimated rapidly from the nodal stresses by FEM for cracks under mixed mode loadings including the T-stress contribution.” Fracture and Structural Integrity 13 (49): 53–64. https://doi.org/10.3221/IGF-ESIS.49.06.

Harvard

Meneghetti, G., Campagnolo, A. and Berto, F. (2019) ‘Averaged strain energy density estimated rapidly from the nodal stresses by FEM for cracks under mixed mode loadings including the T-stress contribution’, Fracture and Structural Integrity, 13(49), pp. 53–64. doi: 10.3221/IGF-ESIS.49.06.

Vancouver

Meneghetti G, Campagnolo A, Berto F. Averaged strain energy density estimated rapidly from the nodal stresses by FEM for cracks under mixed mode loadings including the T-stress contribution. Fracture and Structural Integrity. 2019;13(49):53-64. doi:10.3221/IGF-ESIS.49.06

BibTeX

@article{meneghetti2019, author = {Meneghetti, Giovanni and Campagnolo, Alberto and Berto, Filippo}, title = {Averaged strain energy density estimated rapidly from the nodal stresses by FEM for cracks under mixed mode loadings including the T-stress contribution}, journal = {Fracture and Structural Integrity}, year = {2019}, volume = {13}, number = {49}, pages = {53--64}, doi = {10.3221/IGF-ESIS.49.06}, url = {https://doi.org/10.3221/IGF-ESIS.49.06}, issn = {1971-8993} }

RIS

TY - JOUR AU - Meneghetti, Giovanni AU - Campagnolo, Alberto AU - Berto, Filippo TI - Averaged strain energy density estimated rapidly from the nodal stresses by FEM for cracks under mixed mode loadings including the T-stress contribution JO - Fracture and Structural Integrity T2 - Fracture and Structural Integrity PY - 2019 DA - 2019/05/24 VL - 13 IS - 49 SP - 53 EP - 64 DO - 10.3221/IGF-ESIS.49.06 UR - https://doi.org/10.3221/IGF-ESIS.49.06 SN - 1971-8993 ER -

Licence

Copyright © 2019 Giovanni Meneghetti, Alberto Campagnolo, Filippo Berto.

Copyright 
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