已知一点的应力张量为[img=233x106]1803b37ed4a0d74.jpg[/img](单位:MPa)则该点的主应力为:
A: 28.45MPa, 19.80MPa, -47.32MPa
B: 25.78MPa, 12.40MPa, -43.54MPa
C: 29.86MPa, 17.60MPa, -41.46MPa
D: 26.53MPa, 15.50MPa, -46.89MPa
A: 28.45MPa, 19.80MPa, -47.32MPa
B: 25.78MPa, 12.40MPa, -43.54MPa
C: 29.86MPa, 17.60MPa, -41.46MPa
D: 26.53MPa, 15.50MPa, -46.89MPa
举一反三
- 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
- 某点应力状态所对应的应力圆如下图所示。C点为圆心,应力圆上点A所对应的正应力σ和剪应力τ分别为 ( ) 。[img=630x509]1803be4a7cdc17c.png[/img] A: σ=0,τ=200 MPa B: σ=0,τ=150 MPa C: σ=50 MPa,τ=200 MPa D: σ=50 MPa,τ=150 MPa
- 一点处于平面应力状态, a-a平面上和b-b平面上的应力如图所示。则该点的最大主应力值为( )[img=655x473]1802d891a088e33.jpg[/img] A: 78.1 MPa B: 80.2 MPa C: 82.9 MPa D: 83.7 MPa
- 已知一点的应力状态如图所示,则该点的最大切应力τmax为() [img=184x138]17e0b213b4fd1e1.jpg[/img] A: 25MPa B: 50 MPa C: 75 MPa D: 100 MPa
- 某点应力状态所对应的应力圆如下图所示。C点为圆心,应力圆上点A所对应的正应力σ和剪应力τ分别为 。[img=1313x740]17de93bacdcd6dd.jpg[/img] A: (A)σ=0,τ=200 MPa; B: (B)σ=0,τ=150 MPa; C: (C)σ=50 MPa,τ=200 MPa; D: (D)σ=50 MPa,τ=150 MPa。