J-integral analysis of surface cracks in round bars under combined loadings

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

This paper presents a non-linear numerical investigation of surface cracks in round bars under combined bending and torsion loadings by using ANSYS finite element analysis (FEA). Due to the non-symmetrical analysis, a full finite element (FE) model was constructed and special attention was given at the crack tip of the cracks. The surface cracks were characterized by the dimensionless crack aspect ratio, a/b = 0.6, 0.8, 1.0 and 1.2, while the dimensionless relative crack depth, a/D = 0.1, 0.2 and 0.3. The square-root singularity of stresses and strains was modeled by shifting the mid-point nodes to the quarter-point locations in the region around the crack front. The proposed model was validated with the existing model before any further analysis. The elastic-plastic analysis under the loading was assumed to follow the Ramberg-Osgood relation with strain hardening exponent, n = 5 and 10. J values were determined for all positions along the crack front and then, the limit load was predicted using the J values obtained from FEA through the reference stress method.

Original languageEnglish
Title of host publicationAdvanced Materials Research
Pages187-191
Number of pages5
Volume214
DOIs
Publication statusPublished - 2011
Event2011 International Conference on Key Engineering Materials, ICKEM 2011 - Sanya
Duration: 25 Mar 201127 Mar 2011

Publication series

NameAdvanced Materials Research
Volume214
ISSN (Print)10226680

Other

Other2011 International Conference on Key Engineering Materials, ICKEM 2011
CitySanya
Period25/3/1127/3/11

Fingerprint

Cracks
Finite element method
Load limits
Strain hardening
Crack tips
Torsional stress
Aspect ratio
Plastics

Keywords

  • Finite element analysis
  • J-integral
  • Limit load
  • Stress intensity factor
  • Surface crack

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Ismail, A. E., Mohd Ihsan, A. K. A., Abdullah, S., Ghazali, M. J., & Daud, R. (2011). J-integral analysis of surface cracks in round bars under combined loadings. In Advanced Materials Research (Vol. 214, pp. 187-191). (Advanced Materials Research; Vol. 214). https://doi.org/10.4028/www.scientific.net/AMR.214.187

J-integral analysis of surface cracks in round bars under combined loadings. / Ismail, A. Emran; Mohd Ihsan, Ahmad Kamal Ariffin; Abdullah, Shahrum; Ghazali, Mariyam Jameelah; Daud, Ruslizam.

Advanced Materials Research. Vol. 214 2011. p. 187-191 (Advanced Materials Research; Vol. 214).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Ismail, AE, Mohd Ihsan, AKA, Abdullah, S, Ghazali, MJ & Daud, R 2011, J-integral analysis of surface cracks in round bars under combined loadings. in Advanced Materials Research. vol. 214, Advanced Materials Research, vol. 214, pp. 187-191, 2011 International Conference on Key Engineering Materials, ICKEM 2011, Sanya, 25/3/11. https://doi.org/10.4028/www.scientific.net/AMR.214.187
Ismail, A. Emran ; Mohd Ihsan, Ahmad Kamal Ariffin ; Abdullah, Shahrum ; Ghazali, Mariyam Jameelah ; Daud, Ruslizam. / J-integral analysis of surface cracks in round bars under combined loadings. Advanced Materials Research. Vol. 214 2011. pp. 187-191 (Advanced Materials Research).
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