(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

See attachment

2. Relevant 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.

3. 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

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

2. Relevant equations

3. The attempt at a solution

**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: Structural Analysis - basic beam question

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