Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Calculate the critical crack length:
A wide plate of mild steel is subjected to uniform tensile load causing a stress of 100 MPa. Calculate the critical crack length in the centre of plate which when reached will cause the plate to fracture, if fracture toughness of mild steel is 1340 N / mm2
Solution
The crack will become unstable in the centre of the plate, i.e. the fracture will occur when the crack has attained a critical length (say ac) under given stress ? which remains constant. At this moment KI → KIC.
KI for a large plate with central crack of length 2a is by Eq.
and hence
or
∴ 2ac = 114.3 mm
[This example explains how the knowledge of fracture toughness of material and KI of a crack can be used to calculate the length of a crack which must not be permitted to exist. If the cause of crack extension may not be controlled, the only thing left to designer is to calculate critical length in advance. Then the crack length would have to be monitored throughout the life of the structure and as soon as it approaches the critical value, the structure should be discarded to avoid sudden fracture or other measures be taken by which either KI is reduced to KIC is improved.]
A block whose weight is 36.0 N rests on a horizontal table. A horizontal force of 35 N is applied to the block. The coefficients of static & kinetic friction are 0.650 and 0.420, r
Determine the maximum value of the coefficient of friction: A force of 200 N inclined at 60 o to the horizontal is applied to the block A weighing 400 N. find out whether blo
winter&summer refrigeration .
Jib crane Mechanism: Sol.: Jib crane is taken in use to raise heavy loads. A load W is lifted up by pulling the chain through pulley D as shown in the adjacent figure.
(a) What is cushioning effect of a tyre? (b) What are the desired properties of a wheel?
MODERN ARC WELDING POWER SOURCES Recent advances in the field of solid state power electronics have helped to improve the status of welding power sources. With the development rel
Airport Drainage: Rainwater should be quickly taken away from the runway, taxiway and apron areas. For drainage of runway and taxiway, a cross-slope of 1.5 per cent on either
Write an essay on air, water and soil-based heat pumps. Discuss the advantages and the disadvantages of each system. For each system identify the conditions under which that system
Prove the parallelogram law of forces: Assume that the two forces P and Q act at a point ' O ' as shown in figure given below. The force P can be represented in magnitud
how to count point of contraflexture
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!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd