Determination of Mode I Stress Intensity Factor in a Compact Tension (CT) Specimen using Strain Gage

ABSTRACT

Mode I stress intensity factor was obtained by using electrical-resistance strain gages near the crack tip of a 5083-0 aluminum made compact tension specimen as recommended by ASTM standard E399. A theoretical method was also used to compare the results with the experimental analysis. The results were in a good agreement up to the critical stress concentration or beginning of crack propagation. The crack opening started from 175 lb load application, and the mode I stress intensity factor was about 7500 Psi (in)^0.5. The plastic zone size was also calculated theoretically to determine the singularity dominated zone (SDZ). Send an email to request a copy of this paper.