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Elina [12.6K]
3 years ago
8

Consider a simple tension member that carries an axial load of P=22.44N. Find the total elongation in the member due to the load

. Assume that the member is made of steel, which has a modulus of elasticity of E=204.00 N/mm2. Also assume that the member is 3048 mm long and has a cross-sectional area of 1290 mm2
Physics
1 answer:
rodikova [14]3 years ago
4 0

Answer:

The total elongation for the tension member is of 0.25mm

Explanation:

Assuming that material is under a linear deformation then the relation between the stress and the specific elongation is given as:

\sigma=E*\epsilon (1)

Where E is the modulus of elasticity, σ the stress and ε the specific deformation. Also, the total longitudinal elongation can be expressed as:

\delta L=L*\epsilon (2)

Here L is the member extension and δL the change total longitudinal elongation.  

Now if the stress is found then the deformation can be calculated by solving the stress-deformation equation (1). The stress applied sigama is computed dividing the axial load P by the cross-sectional area A:

\sigma=P/A  

\sigma=22.44N / 1290 mm^2  

\sigma=0.0174 N/mm^2  

Solving for epsilon and replacing the calculated value for the stress and the value for the modulus of elasticity:

=\sigma=E*\epsilon

\epsilon=\sigma/E

\epsilon=0.0174 \frac{N}{mm^2}/\ 204 \frac{N}{mm^2}

\epsilon=8.53*10^-{5}

Finally introducing the specific deformation and the longitudinal extension in the equation of total elongation (2):

\delta L=3048 mm * 8.53*10^{-5}  

\delta L= 0.25 mm

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