Fig. 28.10 Measured increase in bend radius for a 20 % prestrained bend specimen Table 28.4 Overview of bend radius values for varying bend specimens subject to A and C type thermal cycles 10 %-A 10 %-C 20 %-A 20 %-C Transverse-C Combined-C Radius change at first cooling period (in.) 2.10E-04 3.00E-04 2.45E-04 3.88E-04 5.13E-04 6,69E-04 Radius change at second cooling period (in.) 2.08E04 4.11E-04 2.65E-04 4.19E-04 6.12E-04 6.89E-04 0.6 0.4 0.2 0 0 5000 10000 15000 0PS-N3 0PS-N2 0PS-N1 20PS-N3 20PS-N4 20PS-N5 Time (s) a b Vertical Displacement (mm) 20000 25000 0.6 0.4 0.2 0 0 5000 10000 15000 Time (s) Vertical Displacement (mm) 20000 25000 Fig. 28.11 Vertical displacement of the centerpoint of the gage section for dogbone specimens in the (a) undeformed and (b) 20 % prestrained conditions during an A-type thermal cycle 28 Thermal Deformation Analysis of an Aluminum Alloy Utilizing 3D DIC 233
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