Single Specimen Tests for J Ic Determination

摘要: A J I c test procedure using a single deeply cracked specimen is proposed. The crack extension measured by partially unloading the to determine elastic compliance. tests were made ASTM A469 steel. Compact specimens from ½T 5T tested. No size effect was found. Results two independent laboratories are presented and in agreement. errors due simple formulation of calculation, periodic partial unloading, simplified analysis for deep cracks compact explored. measurement point establishing discussed. results indicate that practical effective has been developed.