The J-integral and tearing modulus for a sen specimen under bending and tension

✍ Scribed by Sten Kaiser

• Publisher: Elsevier Science
• Year: 1985
• Tongue: English
• Weight: 678 KB
• Volume: 22
• Category: Article
• ISSN: 0013-7944
• DOI: 10.1016/0013-7944(85)90104-3

✦ Synopsis

expression for determining J from the load displacement record of SEN specimen is given. The result is compared with other analytical expressions and with FE calculations. A correction for crack growth similar to the one given in ASTM standard ES13 is introduced. The applied tearing modulus is given both "exactly" and for an ideally plastic material. Finally J is evaluated in terms of failure curves in a failure-assessment diagram to show that there is no systematical difference between different bending-tension combinations.

SUMMARY 749

The problem of determining J from a load-displacement record of a SEN specimen under combined tension and bending was considered.

An upper-bound solution J which fitted finite-element solutions quite well was given.

The solution was extended to growing cracks, and an expression similar to the one in the ASTM standard ES13 was also given.

An "exact" expression for the applied tearing modulus was determined. J was evaluated in terms of the failure-assessment diagram which showed no systematical difference between different bending-tension combinations.

Aclino~,/edgemenrs-The author wishes to thank Mr. Henrik Sonnerlind for rewarding discussions and valuable help with FE calculations. and Mr. Mats Ekberg for help with numerical calculations. The financial support from the Swedish Nuclear Inspectorate is also gratefully acknowledged.