Stress No More

I wonder if the re-routing of eight lanes of traffic onto four lanes would cause a stress factor of which the four lanes were not designed to with-stand. Thus causing, as in the case of the Minnesota I-35W , a collapse of the structure.

Caffeinated Content

I’ve come acorss a problem, this is what i’m faced with.

A hollow steel tube has an external diamater of 100mm and a 80mm internal diamater, it is 3m long, and is subjected to a tensile load of 400kN. The stress of the tube needs to be calculated, and also, how much would the tube stretch if Youngs Modulus is 200 000 N/mm².

Thanks very much! Any help will be EXTREMELY appreciated.

Sam Lilley

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