Due to the pure bending deformation, the longitudinal ( ) strain varies ( ) from ( ) at the neutral axis to a maximum at the outer fibers of the beam.
A: normal; linearly; zero
B: shear; nonlinearly; zero
C: shear; nonlinearly; zero
D: shear; nonlinearly; zero
A: normal; linearly; zero
B: shear; nonlinearly; zero
C: shear; nonlinearly; zero
D: shear; nonlinearly; zero
举一反三
- When a shaft having a circular cross section is subjected to a torque, the cross section remains plane while radial lines rotate. This causes a ( ) within the material that varies ( ) along any ( ) line. A: shear strain; linearly; radial B: normal strain; linearly; radial C: shear strain; nonlinearly; radial D: shear strain; nonlinearly; longitudinal
- 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 section where the bending moment diagram has abrupt change is: () A: Section with concentrated load B: Section with zero shear force C: Section with zero load D: Section with concentrated couple
- The cantilever beam shown here is subjected to two equal and opposite couples，for the section B（ ）.[img=414x136]1803a25c3173b7f.jpg[/img] A: The deflection is zero, the angle of rotation is not zero B: The deflection is not zero, the angle of rotation is zero C: Deflection and angle of rotation are both not zero D: Both deflection and angle of rotation are both zero
- It is assumed that, in a concrete pavement normal vectors of the neutral surface are always perpendicular to the neutral surface, and therefore no （） strain in horizontal directions A: normal B: shear C: elastic D: plastic