Determine the stress in composite bar, Mechanical Engineering

Assignment Help:

Determine the stress in composite bar:

How do you determine the stress in composite bar? What is Modular Ratio?
Sol.:
It becomes essential to have a compound tie or strut (column) where the two or more material elements are fastened together to prevent uneven straining. The salient features of such composite system are: System extends (or contracts) as one unit when it is subjected to tensile (or compressive) load. This implies that the deformation (extension or contraction) of every element is same.

Strain deformation per unit length of each element is same.

Total external load on system equals sum of loads carried out by different materials comprising the composite system.

Take a composite bar subjected to load P and fixed at the top as shown in the given figure. Total load is shared by two bars and as such
1321_Determine the stress in composite bar.png ...(i)
Further elongation in 2 bars are same,  that is,  δL1 = δL2 = δL3 ...(ii)

If strain in bar are equal e1 =  e2;  σ1/E1 = σ2/E2

or, σ1/ σ2 = E1/E2 (when the length is same)

This ratio E1/E2 is called as Modular ratio.

Modular Ratio: Modular ratio is ratio of moduli of elasticity of the two materials. It can be denoted by µ.
86_Determine the stress in composite bar1.png


Related Discussions:- Determine the stress in composite bar

When was pddi developed, When was PDDI developed The PDDI interface was...

When was PDDI developed The PDDI interface was developed in connection with the ICAM project which was funded by the Air Force in order to improve the manufacturing methods in

Boilers, corrosion in boilers is prevented or minimized by maintaining of...

corrosion in boilers is prevented or minimized by maintaining of boiler water

Motion/movement, What are the different types of Mechanical Motions/Movemen...

What are the different types of Mechanical Motions/Movements?

Relative motion, the jet transport B is flying at the velocity of 600km/h w...

the jet transport B is flying at the velocity of 600km/h when a smaller aircraft A passes underneath the transport headed in the 60 degree direction. To passengers in B, however ap

What is the specific weight of the timber, (Buoyancy; force & moment balanc...

(Buoyancy; force & moment balance) A partially submerged, homogeneous timber is 0.15m by 0.35m in cross-section. What is the specific weight of the timber and the tension in the r

Determine work done per second, A nozzle of 50 mm. dia. delivers a stream o...

A nozzle of 50 mm. dia. delivers a stream of water that strikes a flat plate which is held normal to the axis of stream. If the issuing jet has a velocity of 15 m/sec., determine:

What is hydrostatic extrusion, Q. What is Hydrostatic extrusion? • In t...

Q. What is Hydrostatic extrusion? • In the hydrostatic extrusion process the billet is completely surrounded by a pressurized liquid, except where the billet contacts the die.

welding, types of welding, pressure and non pressure weldin

types of welding, pressure and non pressure welding

Determine the properties of foundation, Determine the Properties of founda...

Determine the Properties of foundation Soil profile together with natural type and properties of each strata will have a bearing on the choice of foundation. The fact that loa

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd