- #1

Confusedbiomedeng

## Homework Statement

A round bar .125mm in diameter , is to be used as a beam. IF Youngs modulus For the material E=200x10

^{3}N/mm

^{2}and the stress due to bending is limited to 17.5N/mm

^{2}

A) Maximum allowable bending moment

B) the radius of curvature at the point of Maximum bending moment

## Homework Equations

σ/y=m/i=E/R

Ina=πD

^{4}/64

## The Attempt at a Solution

A) 17.5/(125/2)=M/1.1x10

^{7}Bending moment =3080000

Ina=1.1x10

^{7}

B) 17.5/125/2=7/25

=> R= 7/25/200x10

^{3}R=1.4mm