中国大学MOOC: If a circular shaft is under torsion, then there should be only shear stresses and no normal stresses on its cross section.
举一反三
- If a circular shaft is under torsion, then there should be only shear stresses and no normal stresses on its cross section. A: 正确 B: 错误
- 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
- 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
- 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
- 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 .