DEVELOPMENT OF A MINIATURIZED SPECIMEN TECHNIQUE FOR FRACTURE TOUGHNESS J//I//c MEASUREMENT.

Xinyuan Mao, Tetsuo Shoji, Hideaki Takahashi

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

The effect of specimen thickness on fracture toughness J//I//c has been investigated with compact tension specimens using the multispecimen R-curve method. HT-9 and A533B-1 steel specimens with thicknesses of 25(1TCT), 10(0. 4TCT), 3, and 0. 5(0. 2TCT) mm were tested. The through-thickness distribution of the plastic energy dissipation or work done within the intense strain region at the crack tip was measured by using a recrystallization-etch technique. Fractographic examinations of the variation of stretch zone width and fracture modes along the specimen thickness were performed. A new J//I//c evaluation procedure for invalid specimen size is proposed using rigid plastic analysis and shear fracture measurements with recrystallizaton-etch or fractographic observations.

Original languageEnglish
Pages (from-to)229-241
Number of pages13
JournalJournal of Testing and Evaluation
Volume16
Issue number2
Publication statusPublished - 1988 Mar 1

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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