Edupanda » Strength of materials »  Axial Tension and Compression » Statically Determinate - Single Bars

List of examples

Example 1

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Two-stage rod has been permanently fixed at end A and loaded with forces P and 2P as shown in the diagram. Calculate the diameter of both rods, knowing the allowable stresses in compression and tension. Draw diagrams of internal forces, normal stresses, and elongations and displacements of the rod. Data: 𝑃 =10𝑘𝑁,𝐸 =2.1 105𝑀𝑃𝑎,𝑎 =1𝑚,𝑘𝑟 =60𝑀𝑃𝑎,𝑘𝑐 =80𝑀𝑃𝑎

Example 2

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A two-stage rod has been permanently fixed at end D and loaded with forces P and 2P as shown in the figure. Calculate the value of force F so that Δ𝑙 =0

Data: 𝑑1 =20𝑐𝑚,𝑑2 =15𝑐𝑚,𝐸 =2.1 105𝑀𝑃𝑎,𝑃 =15𝑘𝑁

Example 3

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Calculate the inner diameter of the hole that can be drilled axially to a depth of 3 meters.

Data: 𝐷 =20𝑐𝑚,𝐸 =85𝐺𝑃𝑎,𝑃 =15𝑘𝑁,𝑢𝑚𝑎𝑥 =0.15𝑚𝑚

Example 4

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Calculate:

- normal forces on intervals N(x)

- stresses 𝜎(𝑥)

Calculate the total elongation of the rod.

Given: P=20 kN, d=2 cm