Evaluate stress in fibre, Mechanical Engineering

Assignment Help:

Evaluate stress in fibre:

Example, the matrix material can be stressed to its full strength of 80 MPa, calculate the allowable % of broken fibres. What will be the stress in fibre in both the cases?

Solution

σ′ = 1200 MPa, σ′ = 80 MPa, V f= 0.7,  E f/ Em = 24

∴          x = (1200 - 80 + 0.7 (1 - 24) 80) /(1200 + 80 (1 - 24))

                = 0.2625

26.25% fibre might be broken.

The fibre stress when σ′m  = 64 MPa .

σ′f = σ′m × E f / Em

= 64 × 24 = 1536 MPa

When

σ′m = 80 MPa, σ′f = 80 × 24 = 1920 MPa

Note down that in both the cases the fibre stress is less than its strengths of 2400 MPa.

This is concluded that less broken fibres are allowable if the matrix material is permitted to be stressed to its capacity but in such case the fibre shall be subjected to higher stress.


Related Discussions:- Evaluate stress in fibre

Thrust diagrams for the beam, Thrust diagrams for the beam: Illustrate...

Thrust diagrams for the beam: Illustrate the shear force, bending moment & thrust diagrams for the beam illustrated in Figure Figure Solution Vertical compo

Section modulus, Section modulus: Define the Section modulus. What d...

Section modulus: Define the Section modulus. What do you mean by torsional section modulus or polar modulus?  The moment of inertia of plane about the axis perpendicula

Winch gearbox design, An engine repair workshop in County Durham has identi...

An engine repair workshop in County Durham has identified a need  for a winch which is  to lift complete engine assemblies from floor level up to workbench level  to allow  remedia

Thermal Systems Analysis and Design, Create Visual Basic function ffactor(R...

Create Visual Basic function ffactor(Re, rr) that calculates the Darcy-Weisbach friction factor in a pipe or duct, where Re is the Reynolds No. and rr is the relative roughness, us

Materials used in insulation, Q. Materials used in insulation? All mate...

Q. Materials used in insulation? All materials must be non-corrosive, compatible with other materials and used in accordance with the Manufacturer's recommendations. All mat

Evaluate the exit velocity, A perfect gas flows through a nozzle when it ex...

A perfect gas flows through a nozzle when it expends in a reversible adiabatic manner, the inlet conditions are 22 bar,, 500 o c, 38 m/s. At exit the pressure is 2 bar. Evaluate th

Head pump, the pump, shown in the figure, is used to deliver water to a dis...

the pump, shown in the figure, is used to deliver water to a distribution system. there is no flow to or from reservoir A, but it is used to damp pressure and protect the pump. th

Seam welding, Seam Welding Seam welding is different from spot welding ...

Seam Welding Seam welding is different from spot welding by the fact that roller type electrodes are used in the former case. The principle and process of welding are the same

Which three principal possible in radial drilling machine, Which three prin...

Which three principal possible in radial drilling machine Between them the plain drill machine, three principal movements are possible in this type of machine, by vertical move

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