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

Calculate resonant frequency, A vibrating system having mass 1.2 Kg is susp...

A vibrating system having mass 1.2 Kg is suspended by a spring of stiffness 1000 N/m and it is put to harmonic excitation of 10 N. Assuming viscous damping, Calculate : (a) R

Horizontal curves - railways, Horizontal Curves - Railways In railwa...

Horizontal Curves - Railways In railway engineering, the horizontal curve is defined by its degree as well as by its radius. The degree is the angle subtended at the centre

Determine the maximum shear stress, Determine the maximum shear stress: ...

Determine the maximum shear stress: A beam of triangular cross section of base width 120 mm & height 80 mm is subjected to a shear stress force of 3 kN. Determine the maximum

Evaluate force to slide the body over the surface, Evaluate Force to slide ...

Evaluate Force to slide the body over the surface: A body having weight 100N rests on rough horizontal surface (µ = 0.3) and is acted upon by a force applied at an angle of 3

Materials requirements planning, Materials requirements planning: Mate...

Materials requirements planning: Materials requirements planning (MRP) is a set of process for converting forecasted demand for a manufactured product into a requirement sched

Necessity of electrical system , Necessity of Electrical System Li...

Necessity of Electrical System Lights and horn for safe riding of vehicle even at night. Electricity for ignition of fuel in the engine. Battery Charging.

How is bearing capacity of soil varied, How is bearing capacity of soil var...

How is bearing capacity of soil varied? The bearing capacity of soil varies not only with its strength but also with the magnitude and distribution of the load. When a load Q,

Calculation for stress-strain carves, Calculation for Stress-strain carves:...

Calculation for Stress-strain carves:   After reaching point D, if bar is strained further, a local reduction in cross section occurs in gauge length (that is, formati

Copper-beryllium alloys, Copper-Beryllium Alloys Copper-beryllium allo...

Copper-Beryllium Alloys Copper-beryllium alloys comprise between 0.6 to 2% Be and 0.2 to 2.5% Cobalt. Such alloys can be precipitation hardened and cold worked to improve a te

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