举一反三
- If the normal stress on the cross section of the axial tensile rod is σ, then the normal stress and shear stress on the 45° degrees section are .
- 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
- The flexure formula is based on the requirement that the ( ) on the cross section is equal to the ( ) produced by the ( ) distribution about the neutral axis.? resultant moment; moment; linear normal stress|resultant moment; moment; nonlinear normal stress|resultant moment; moment; nonlinear shear stress|resultant normal force; force; linear normal stress
- The two types of stress are normal stress and stress.
- 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
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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
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For a bar under axial tension, the sections with the maximum normal stress and maximum shear stress are A: the cross section and inclined section with inclined angle 45°, respectively. B: both the cross sections. C: the inclined section with inclined angle 45°and cross section, respectively. D: both the inclined sections with inclined angle 45°.
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When the soil reaches the limit equilibrium state, the location of shear failure surface must be on the maximum shear stress surface（ ）
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On the top of the concrete pavement, （） is developed during day time. A: tensile stress B: shear stress C: compressive stress D: bulk stress
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（） is induced due to temperature variation along slab thickness. A: thermal stress B: primary stress C: shear stress D: curling stress