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156 Mechanical Behaviour of Plastics

Table 2.3
Charpy calibration factor (0)

0 Values
alD S/D=4 S/D=6 S/D=8

0.06 1.183 1.715 2.220
0.10 0.781 1.112 1.423
0.20 0.468 0.63 1 0.78 1
0.30 0.354 0.450 0.538
0.40 0.287 0.345 0.398
0.50 0.233 0.267 0.298
0.60 0.187 0.205 0.222

0 25 50 75 100
BD0 (x lo4 m2)
Fig. 2.84 Plot of U, against BD0