Example: 4 A prismatic steel bar having cross sectional area of A=300 mm? is subjected to axial load as shown in figure . Find the net increase & in the length of the bar. Assume E = 2 x 10 5 MPa.( Ans ô = -0.17mm) %3D 20 kN 15 kN 15 kN В A 2 m m

Example: 4 A prismatic steel bar having cross sectional area of A=300 mm? is subjected to axial load as shown in figure . Find the net increase & in the length of the bar. Assume E = 2 x 10 5 MPa.( Ans ô = -0.17mm) %3D 20 kN 15 kN 15 kN В A 2 m m

Mechanics of Materials (MindTap Course List)

9th Edition

ISBN:9781337093347

Author:Barry J. Goodno, James M. Gere

Publisher:Barry J. Goodno, James M. Gere

Chapter2: Axially Loaded Members

Section: Chapter Questions

Problem 2.6.10P: A prismatic bar with a length L = 1 m and cross-sectional area A = 1200 mm2 is supported at the...

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Concept explainers

Axial Load

When a bar of the uniform cross-section is acted by a load, such that the load acts along the longitudinal axis of the bar, such kinds of loadings are known as axial loadings. In general terms, a load is an external force acting on a component. An axial load acts perpendicular to the geometric cross-section of the component. Based on the direction of the application of the load, an axial load can be tensile or compressive. The analysis of bodies under the action of axial loads is generally studied under the branch of mechanics, known as statics.

Question

Example: 4 A prismatic steel bar having cross sectional
area of A=300 mm? is subjected to axial load as shown in
figure . Find the net increase & in the length of the bar.
Assume E = 2 x 10 5 MPa.( Ans ô = -0.17mm)
%3D
20 kN
15 kN
15 kN
В
A
2 m
1m,
m 1m
15
A
15
0 – B
20
C
20
Solution:
8 = 20000*1000/(300*2x10 5)-15000*2000/(300*2 x10 5)
= 0.33 - 0.5 = -0.17 mm (i.e.contraction)

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