Temperature rise near a crack tip due to plastic work under intermediate loading rate and the study of loading rate dependency on fracture toughness for steels

Masahiro Toyosada, Koji Gotoh, Kenji Sagara

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

3 Citations (Scopus)

Abstract

This paper investigates temperature rise distribution near a crack tip of CT specimens of a mild steel due to plastic work under intermediate loading rate for the purpose of considering the criterion for crack instability under arbitrary loading rate. The dynamic thermal elastoplastic FEM analysis shows good agreement with experimental temperature rise distributions by using a thermo viewer. The calculation results of yield stress in the process zone in the vicinity of a crack tip is fairly constant because of opposed effects of strain rate and temperature on yield stress. Moreover yield stress in the process zone increases with increasing loading rates up to a certain rate due to the increase in strain rate, however, the increase in loading rates over the certain value leads to decrease in yield stress which is caused by local heating near a crack tip due to plastic work because there is not enough time to dissipate heat. From the above information, the criterion of fracture initiation under arbitrary loading rate is conducted. Experimental Kc values of HT-50 TMCP steel with various loading rates support quantitatively the criteria.

Original languageEnglish
Title of host publicationProc Second Int Offshore Polar Eng Conf
PublisherPubl by Int Soc of Offshore and Polar Engineerns (ISOPE)
Pages108-115
Number of pages8
ISBN (Print)1880653044
Publication statusPublished - 1992
EventProceedings of the Second International Offshore and Polar Engineering Conference - San Francisco, CA, USA
Duration: Jun 14 1992Jun 19 1992

Other

OtherProceedings of the Second International Offshore and Polar Engineering Conference
CitySan Francisco, CA, USA
Period6/14/926/19/92

Fingerprint

Crack tips
Yield stress
Fracture toughness
Plastics
Steel
Strain rate
Temperature distribution
Temperature
Carbon steel
Cracks
Finite element method
Heating
Hot Temperature

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Toyosada, M., Gotoh, K., & Sagara, K. (1992). Temperature rise near a crack tip due to plastic work under intermediate loading rate and the study of loading rate dependency on fracture toughness for steels. In Proc Second Int Offshore Polar Eng Conf (pp. 108-115). Publ by Int Soc of Offshore and Polar Engineerns (ISOPE).

Temperature rise near a crack tip due to plastic work under intermediate loading rate and the study of loading rate dependency on fracture toughness for steels. / Toyosada, Masahiro; Gotoh, Koji; Sagara, Kenji.

Proc Second Int Offshore Polar Eng Conf. Publ by Int Soc of Offshore and Polar Engineerns (ISOPE), 1992. p. 108-115.

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

Toyosada, M, Gotoh, K & Sagara, K 1992, Temperature rise near a crack tip due to plastic work under intermediate loading rate and the study of loading rate dependency on fracture toughness for steels. in Proc Second Int Offshore Polar Eng Conf. Publ by Int Soc of Offshore and Polar Engineerns (ISOPE), pp. 108-115, Proceedings of the Second International Offshore and Polar Engineering Conference, San Francisco, CA, USA, 6/14/92.
Toyosada M, Gotoh K, Sagara K. Temperature rise near a crack tip due to plastic work under intermediate loading rate and the study of loading rate dependency on fracture toughness for steels. In Proc Second Int Offshore Polar Eng Conf. Publ by Int Soc of Offshore and Polar Engineerns (ISOPE). 1992. p. 108-115
Toyosada, Masahiro ; Gotoh, Koji ; Sagara, Kenji. / Temperature rise near a crack tip due to plastic work under intermediate loading rate and the study of loading rate dependency on fracture toughness for steels. Proc Second Int Offshore Polar Eng Conf. Publ by Int Soc of Offshore and Polar Engineerns (ISOPE), 1992. pp. 108-115
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