Question

can anyone help me with applications of elasticity i read it but i cannot understand :(

Answer 1

As usual, it's best if you post a specific question.

Answer 2

k

Answer 3

why does girders have I shape

Answer 4

To make them more rigid. With this shape, it's harder for the girder to bend in either direction.

Answer 5

can u relate it to elastic behaviour or sthng like that?

Answer 6

yes: In both directions---x and y---there is with this design a greater thickness of material than there would be if the girder were not I-shaped. As a consequence, the amount of force required to deform the girder is greater than it would be not I-shaped.

Answer 7

why does pillars have below shape

Answer 8

james srry bt i didnt get what u meant by the first one

Answer 9

There are three types of column failure:

This design helps minimize them.

Answer 10

wel i hav an equation here can u xplain with that ??

Answer 11

\[sagging=wl^3/4bd^3 Y\]

Answer 12

Returning to the I-beams for the moment: the wikipedia article gets it right:
"The horizontal elements of the "I" are flanges, while the vertical element is the web. The web resists shear forces while the flanges resist most of the bending moment experienced by the beam."
http://en.wikipedia.org/wiki/I-beam

Answer 13

I don't know this sagging equation. Just think it through in your mind, or make a model out of cardboard.

Why does an I-shaped beam perform better than a beam that is just a vertical slab of metal?

Answer 14

CAN U XPLAIN THAT THICKNESS PART Y IS IT MORE?

Answer 15

do u mean that if thickness increases then bending decreases?

Answer 16

Yes

Answer 17

k i hav another interesting qn pls look at it

Answer 18

Post it on the left.