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 the kic from the data - thick cylinder, Calculate the KIC from th...

Calculate the KIC from the data - thick cylinder: In a fracture test a 3-point bend specimen of thickness 20 mm and depth 25 mm is supported over a span of 100 mm. The specime

Tool geometry, why single point cutting tool used in lathe

why single point cutting tool used in lathe

Explain the hydrostatic sensor paver machine, Explain the Hydrostatic senso...

Explain the Hydrostatic sensor paver machine Machine Name: - Hydrostatic sensor paver machine   We give Mechanical Paver and Mechanical Screed, which are used for laying w

Gear, in the spiral or helical gears- have meshing gear different helix ang...

in the spiral or helical gears- have meshing gear different helix angle?

Design transfer facilities in plant, Q. Design Transfer Facilities in plant...

Q. Design Transfer Facilities in plant? Transfer facilities (e.g. pumps, piping, and conveyers) must be arranged so that no leaks can escape the confines of the bund / dike, an

Why we need additives explain, Q. Why we need additives explain? Additi...

Q. Why we need additives explain? Additives are the materials added in small quantities to the moulding sand in order to enhance its exiting properties and to impart to it spec

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