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

Objectives of planning, What are the objectives of Planning, production and...

What are the objectives of Planning, production and control ? What are the decisions involved in PPC ? What are the information needed for these decisions ?

Determine the types of evolutionary cad applications, Determine the Types o...

Determine the Types of Evolutionary CAD applications Evolutionary CAD applications supporting design can be categorized into three types - traditional, knowledge based, and im

#title.If your requirement is for a sensor suitable for a he, Ask question ...

Ask question #Minimum 100 words acceptedIf your requirement is for a sensor suitable for a heavy industrial application, with a linear characteristic, working in temperatures up to

Extrusion, Difference between hot extrusion and cold extrusion

Difference between hot extrusion and cold extrusion

Structural steels, Structural Steels Low alloy steels are utilized fo...

Structural Steels Low alloy steels are utilized for structural causes. That type of steels is needed to possess high yield stress, excellent ductility and high fatigue resist

Determine the stability of the closed loop system, Determine the stability ...

Determine the stability of the closed loop system whose open loop transfer function is Use the Nyquist criterion

Analyze motion of the two bodies connected by string, Analyze motion of the...

Analyze motion of the two bodies connected by string: Analyze motion of the two bodies connected by string one of which is hanging free and other lying on smooth inclined pla

Explain the lip clearance angle - angle of drills, Normal 0 fal...

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

Spot welding of different metals-copper, Spot welding of different metals-C...

Spot welding of different metals-Copper Resistance welding copper is perhaps the most difficult case owing to the high electrical and thermal conductivities of copper. If is no

What do you mean by line designation tables, Q. What do you mean by Line De...

Q. What do you mean by Line Designation Tables? Development of the Line Designation Tables (LDT's) is carried out in conjunction with the evolution of the P&ID's. Engineering

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