7.20 For the tensile impact bar shown in Figure P7.20, estimate the ratio of impact energy that can be absorbed with and without the notch (which reduces the diameter to 24 mm) Assume that K K₁ = K₁. [Ans.: 0.06: 1] K = 4 K = 1.55 Drop weight 24 mm dia. -30 mm dia. K=1.4 FIGURE P7.20

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7.20
For the tensile impact bar shown in Figure P7.20, estimate the ratio of impact energy
that can be absorbed with and without the notch (which reduces the diameter to 24 mm)
Assume that K K₁ = K₁.
[Ans.: 0.06: 1]
K = 4
K = 1.55
Drop
weight
24 mm dia.
-30 mm dia.
K=1.4
FIGURE P7.20
Transcribed Image Text:7.20 For the tensile impact bar shown in Figure P7.20, estimate the ratio of impact energy that can be absorbed with and without the notch (which reduces the diameter to 24 mm) Assume that K K₁ = K₁. [Ans.: 0.06: 1] K = 4 K = 1.55 Drop weight 24 mm dia. -30 mm dia. K=1.4 FIGURE P7.20
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