The bending stress developed at corners A is ( ). [img=480x470]1803275e1832bda.jpg[/img]
A: 30 MPa (Tension)
B: 30 MPa (Compression)
C: 42 MPa (Tension)
D: 42 MPa (Compression)
A: 30 MPa (Tension)
B: 30 MPa (Compression)
C: 42 MPa (Tension)
D: 42 MPa (Compression)
C
举一反三
- If the beam is subjected to a bending moment of M = 16 kN.m, the maximum bending stress inthe beam is ( ). [img=758x530]17de83378488e00.jpg[/img] A: 48.6 MPa B: 74.5 MPa C: 59.6 MPa D: 85.4 MPa
- If the beam is subjected to a bending moment of M = 15 kN.m, the maximum bending stress inthe beam is ( ). [img=443x401]1803275dfac22cc.jpg[/img] A: 5.88 MPa B: 3.92 MPa C: 1.96 MPa D: 7.84
- The average stress σm and stress amplitude σa of the alternating stress in the figure are respectively ( ).[img=239x154]17de8405f43ce66.jpg[/img] A: σm = 40MPa，σa = -120 MPa B: σm = -40MPa，σa = -40 MPa C: σm = 0MPa，σa = 120 MPa D: σm = -40MPa，σa = 80 MPa
- 图示某危险点的应力状态，其主应力[img=17x17]1802d1d0a26b7ea.png[/img]和最大切应力[img=33x17]1802d1d0aaf4fad.png[/img]为（ ）。[img=148x135]1802d1d0b624ea8.jpg[/img] A: 130 MPa, 80 MPa B: 120MPa，30 MPa C: 150MPa，60 MPa D: 140 MPa,, 80MPa
- (4) The normal stress associated with the bending moment is ( ) MPa
内容
- 0
与图（a）应力状态对应的最大切应力作用面（用阴影面表示）是： 。图中应力单位均为MPa。[img=386x142]18034e21bde14f3.png[/img] A: （a） 30 MPa ， B: （b) 45 MPa C: （c） 75 MPa ， D: （d） 15 MPa 。
- 1
图示单元体，若sa = 50 MPa，sb = 。[img=150x144]18037a30c22bd6d.jpg[/img] A: 150 MPa； B: 100 MPa； C: 50 MPa； D: 0 MPa。
- 2
图中所示为一平面应力状态，[img=28x19]1802d891686c412.png[/img]截面上的正应力和切应力分别为( )[img=598x444]1802d89176bc4ee.jpg[/img] A: 52.7 MPa, -30.8 MPa B: 52.7 MPa, -31.8 MPa C: 49.7 MPa, -34.8 MPa D: 49.7 MPa, -33.8 MPa
- 3
图示单元体，已知σα=10 MPa，则σα+90[img=9x14]18035c2c244c391.png[/img]= MPa[img=125x128]18035c2c2fffcaf.png[/img] A: 10 B: -30 C: 70 D: -20
- 4
图示单元体，已知σα=10 MPa，则σα+90[img=9x14]180305c7cebb736.png[/img]= MPa[img=125x128]180305c7d8d564b.png[/img] A: 10 B: -30 C: 70 D: -20