A: when the minor principal stress is equal to the elastic limits value in a simple tension test
B: when the greatest principal stress reaches the elastic limit value in simple tension test
C: when the greatest principal stress is equal to the stress corresponding to the upper yield limit in a tension test
D: none of the above
举一反三
- When the soil reaches the limit equilibrium state, the location of shear failure surface must be on the maximum shear stress surface（ ）
- In Mohr-Coulomb failure criterion, failure occurs when the ______ is achieved and not when the maximum shear stress is achieved.
- The maximum shear stress in the rod in tension and compression is 40MPa, then the maximum normal stress in the rod is equal to . A: 80MPa B: 40MPa C: 60MPa D: 56.6MPa
- When the soil reaches the limit equilibrium state, the location of shear failure surface must be on the maximum shear stress surface（ ） A: 正确 B: 错误
- 中国大学MOOC: For a bar under axial tension, the sections with the maximum normal stress and maximum shear stress are
内容
- 0
The general three-dimensional state of stress at a point can be represented by an element oriented so that only ( ) act on it. A: three principal stresses B: two principal stresses and one shear stress C: six principal stresses D: three absolute maximum shear stresses
- 1
Which of the following statements are correct? A: The soil only produces transient settlement and secondary consolidation settlement under the action of additional stress B: The volume of the soil gradually decreases during the consolidation and settlement process, and the effective stress gradually increases C: Consolidation Settlement can be calculated by elastic theory D: Settlement of sand foundation can be calculated by elastic theory
- 2
The principal _________features are stress, length, pitch and intonation, as all of them can be used to distinguish meaning.
- 3
The cross section of a straight beam remains plane when the beam deforms due to bending. This causes ( ) on one side of the beam and ( ) on the other side. The neutral axis is subjected to ( ) .? normal stress; shear stress; zero stress|tensile stress; compressive stress; zero stress|compressive stress; tensile stress; maximum normal stress|shear stress; normal stress; zero stress
- 4
In axial tension, the ratio of axial stress to strain is always constant( ).