1.(单选题)一空心钢轴和一实心铝轴的外径相同,比较两者的抗扭截面系数,下列选项正确的是

A.<img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240111/1704959826185499.png">

B.<img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240111/1704959826207727.png">

C.<img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240111/170495982622821.png">

D.<img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240111/1704959826355817.png">

A.因为空心轴更便宜

B.因为空心轴更美观

C.因为空心轴的抗扭截面系数更大

D.因为空心轴更容易制造

A.(A)

B.(B)

C.（C）

D.(D)

A.Z=π/64*(D^4-d^4)/d

B.Z=π/32*(D^3-d^3)/d

C.Z=π/8*(D^4-d^3)/D

D.Z=π/32*(D^4-d^4)/D

A.fcu>fc>ft

B.fcu>ft>fc

C.fc>fcu>ft

D.fc>ft>fcu

A.内部最大外部最小

B.轴心为零，外边界最大

C.轴心最大，外边界为零

D.内外均匀分布

A.0.85

B.0.9

C.0.7

D.0.75

A.最大切应力相同，扭转角相同

B.最大切应力相同，扭转角不同

C.最大切应力不同，扭转角相同

D.最大切应力不同，扭转角不同

A.<img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240111/170495982829680.png">

B.<img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240111/1704959828336637.png">

C.<img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240111/1704959828390326.png">

D.<img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240111/170495982844964.png">