in the following question i am asked to find all the possible mechanisms, in the given state, and then when the "X" bar has an area of A and not 2A(adsbygoogle = window.adsbygoogle || []).push({});

the answers are:

when area of X=2A

i) plastic hinge at D

ii) yielding of Y and X bars

iii) plastic hinge at C, yielding of "Y" bar

when area of X=A

i) plastic hinge at D

ii) yielding of Y and X bars

i understand why these are correct, but why can i not have a situation where "X" yields and Y does not???

also in the second case, where area=A, why is the 3rd option not a possibility??

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Plastic failure,

**Physics Forums | Science Articles, Homework Help, Discussion**