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Evaluation of the thermal shock fracture toughness of reactor graphites by arc discharge heating

✍ Scribed by S. Sato; H. Awaji; H. Akuzawa

Publisher: Elsevier Science
Year: 1978
Tongue: English
Weight: 732 KB
Volume: 16
Category: Article
ISSN: 0008-6223
DOI: 10.1016/0008-6223(78)90005-2

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✦ Synopsis

This paper presents a new technique to determine the thermal shock fracture toughness by a basic analysis of stress intensity factors of the disk with an edge crack. The thermal shock fracture toughness is defined as I(,&/& (Krc standing for fracture toughness value of the mode I: k for thermal conductivity; E for Young's modulus: (I for thermal expansion coefficient) and is determined en bloc by measuring the threshold electric power of the arc discharge heating produced when an edge crack propagates in the disk. This is intimately corelated to the thermal shock resistance presented previously. Experimental data for four kinds of reactor graphite are shown.

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✍ Sennosuke Sato; Kazujiro Sato; Yoshio Imamura; Jun-ichi Kon 📂 Article 📅 1975 🏛 Elsevier Science 🌐 English ⚖ 761 KB

This paper presents a technique to determine the thermal shock resistance of graphite by a basic analysis of non-steady thermal stress in a circular disk heated by an arc discharge at its central part. The thermal shock resistance is defined as A = cr,k/Ea, (a,, circumferential tensile thermal stres