1. Nov 11, 2008

### smiffy66

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

I missed a day at college last week when i was off sick due to tonsilitis. I recieved some homework today and it is going to be similar to a test next week. I really need to know how to do this and the lecturer has not been very helpful either.

A) I have a rectangular cross-section bar that is, 100mm x 40mm square and 500mm long. This is subjected to an axial tensile load of 210kN.

From this information i need to determine.
1) The axial strain.
2) The lateral strain.
3) The changes in cross sectional dimensions.

The material has a modulus of elasticity 80GPa, and poissons ratio of 0.25.

B) A bar of circular cross-section is subjected to a tensile load of 210kN, which is within the elastic range. The bar is made from a steel with 80GPa and Poissons ration = 0.25, it has a diameter of 25mm and 0.8m long. Determine the extension of the bar and the decrease in diameter..

Please give me as much help as you can as i am finding this very confusing, all help is appreciated.

2. Nov 11, 2008

### LowlyPion

3. Nov 11, 2008

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