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

ISMB 250, WHAT IS LOAD CARRYING CAPACITY ISMB 250 OF 1.2 MTR LENGTH. PL REP...

WHAT IS LOAD CARRYING CAPACITY ISMB 250 OF 1.2 MTR LENGTH. PL REPLY

Operation and maintenance of plant, Process units should have staggered acc...

Process units should have staggered access from at least two directions. The space between battery limits of adjoining units should be kept clear and open. Do not consider the clea

Necessity of battery , Necessity of Battery To obtain power for ig...

Necessity of Battery To obtain power for ignition system. To obtain power for lighting. To obtain power for horn. To obtain power for self-starting.

Deteremine the birth of iges, Normal 0 false false false ...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Suggestion, sir, you are doing such a great thing.but my suggestion is that...

sir, you are doing such a great thing.but my suggestion is that please u put some engineering problems to solve. for engineering student like me.

Production test rings, Q. Production Test Rings? The frequency for the ...

Q. Production Test Rings? The frequency for the tests shall be as follows: • One sample at the 10th joint • One sample at the 75th joint • One sample at the 300th join

Simple mechanism, differentiate between kinematic chain and mechanisms

differentiate between kinematic chain and mechanisms

Determine magnitude of greatest shear stress, At a point in a rectangular b...

At a point in a rectangular block of elastic material under strain, there is a tensile stress of 50MPa on one plane and a compressive stress of 30 MPa on a plane at right angles. T

#title.strengh of materials., What is the Ultimate Tensile Strength for alu...

What is the Ultimate Tensile Strength for aluminum in the SI Units?

Oil seal found still leaking-stator plate oil seal complaint, After trial i...

After trial if oil seal found still leaking: Dismantle engine and check crank shaft for run out which should not be more than 0.10 mm.

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