5. (5.0 points )Steel is outstanding as a structural material, because it never deforms and can thus be used in skyscrapers.
5. (5.0 points )Steel is outstanding as a structural material, because it never deforms and can thus be used in skyscrapers.
In the following conclusions, ( ) is wrong. A: If the object displaces, it must deform at the same time. B: If there is no displacement at each point of the object, there must be no deformation. C: If the object deforms, there are always some points in the object to displace. D: The magnitude of the displacement depends on the deformation and constraint of the object.
In the following conclusions, ( ) is wrong. A: If the object displaces, it must deform at the same time. B: If there is no displacement at each point of the object, there must be no deformation. C: If the object deforms, there are always some points in the object to displace. D: The magnitude of the displacement depends on the deformation and constraint of the object.
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 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