Structures under Combined Loading

Example: (continued)

Next show the resisting force and moment at section a—a in the figure below.

R = - 150 i lb = resisting force at section x = a

where | R | is the tensile axial force at the section

M = - 2000 i + 900 j + 1500 k lb in = resisting moment at section x = a

M = M_x i + M_y j + M_Z k lb

where the x-component is the resisting torque at the section

the y-component is the bending moment about the y-axis at the section

and the z-component is the bending moment about the z-axis at the section

Note: R produces a normal tensile force acting on elements A and B

M_z produces a tensile bending stress on element A

M_x produces a shearing stress on elements A and B

M_y produces a compressive bending stress on element B

Next calculate the components of stress acting on elements A and B for the
resisting moment and resisting force acting at the section.

Click here to continue with this example.

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