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[单选题]
某铝合金材料的泊松比σ=0.34,Cs=3100m/s,则瑞利波的传播速度C,约为()
A.0.93C
B.0.92C
C.0.95Cs
D.0.9Cs
查看答案
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A.0.93C
B.0.92C
C.0.95Cs
D.0.9Cs
式中V0和V分别代表原来和形变后的体积。
(2)式子是否适用于压缩?
(3)低碳钢的杨氏模量为Y=19.6x1010Pa,泊松比为σ=0.3,受到的拉应力τ0=1.37Pa,求杆体积的相对改变。
A.0.28
B.0.30
C.0.32
D.0.34
A.0.18%
B.0.34%
C.0.40%
D.4.03%