Optimization of fatigue-crack growth testing for first wall materials development evaluations

Evaluating fatigue crack propagation properties using a cylindrical rod specimen

“…(ii) À15.0 < X 6 À 2.0 or 0.54 6 NA < 0.87: NA ¼ 0:38076 À 9:48426 Â 10 À2 X À 9:70327 Â 10 À3 X 2 À 5:34726 Â 10 À4 X 3 À 1:10686 Â 10 À5 X 4 Elastic finite element analysis showed that the normalized compliance-normalized area relationship is independent of rod diameter for diameters ranging from 5 mm to 15 mm [14]. Experimental measurement show that this is the case for the 10 mm and 8 mm diameter rods as their data fall on to the best fit curve expressed by Eq.…”

“…At present, a large amount of work have been made on the technique of using small amounts of materials for the evaluation of impact and fracture toughness properties [1][2][3]. Similar studies on fatigue properties testing are relatively limited [4][5][6][7][8][9][10][11] and most of them are confined to evaluation of stress/strain-life curves. A recent work compared a number of three-point bending specimens [12].…”