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°.
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 .
- 中国大学MOOC: For a bar under axial tension, the sections with the maximum normal stress and maximum shear stress are
- The main failure modes of inclined section of flexural members can be ordered as ( ) from high to low according to the corresponding shear capacity. A: inclined tension failure > shear-compression failure> inclined compression failure B: shear-compression failure > inclined tension failure > inclined compression failure C: inclined compression failure > shear-compression failure> inclined tension failure D: shear-compression failure> inclined compression failure > inclined tension failure
- Among the main failure modes of the inclined section in flexural members, the inclined tension failure and the inclined compression failure belong to brittle failure, and the shear-compression failure belongs to ductile failure.
- The rotation angle of the cross section at the maximum deflection of the beam must be equal to zero. ( )
内容
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The rotation angle of the cross section at the maximum deflection of the beam must be equal to zero. ( ) A: 正确 B: 错误
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For axial compression members, because the normal stress on the cross section is evenly distributed, it is not necessary to consider the reasonable shape of the cross section
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中国大学MOOC: A beam with rectangular cross section is subjected to pure bending. The normal stress distribution on the cross section should be
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According to the dip angle of the ore body, the open-pit deposit can be divided into ( ). A: Horizontal and near horizontal deposits B: Gently inclined deposit C: Inclined deposit D: Steep deposit
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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