- #1
Munt
- 2
- 0
Homework Statement
See attachment
Homework Equations
Im using sigma(max) = -EKy where y is the dist from neutral axis
.: sigma(max) = -(M.y)/I ----------(1)
plus the standard statical equil. equations.
The Attempt at a Solution
I use y = 170mm
"I" is given as 301.3x10^-6 m4
so i just need to find the moment on the highest -stress particle in the beam?
reaction at end supports = 15kN
So Sum.M(x=3m) = 0 = (-15kN.3m) + M(particle)
.: M(particle) = 45kN.m
plug all into eqN (1) gives me a maximum stress of 25390 kPa (comp).
Is this correct?
Cheers