Degarmo's Materials And Processes In Manufacturing
13th Edition
ISBN: 9781119492825
Author: Black, J. Temple, Kohser, Ronald A., Author.
Publisher: Wiley,
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Chapter 9, Problem 32RQ
To determine
The reason(s) for failure analysis data to be a useful tool in the material selection decision.
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Given your understanding of what initiates and controls failure in materials, which of the following will reduce the failure strength or lifetime of a
test piece and why?
a.
(more than one answer is possible for this question. marks will only be awarded for the question if all the correct options are selected (i.e. 'all or
nothing' marking scheme).
b.
LUS
C.
d.
Increasing its volume, greater likelihood of critical defects
Decreasing the loading frequency, the material will be at peak stress values for longer
Decreasing the grain size, more grain boundaries to initiate failure
Increasing the difference between the maximum and minimum stress values, as this affects the stress concentration factor
Recent M
Raising the temperature above the BDTT, more plastic deformation in the lattice will cause it to fail faster
G
Explain how test results influence material selection for a given application.
For design or analysis, what is important to determine?
Chapter 9 Solutions
Degarmo's Materials And Processes In Manufacturing
Ch. 9 - What is the objective of a manufacturing...Ch. 9 - What are some undesirable features of...Ch. 9 - What problems are created by the availability of...Ch. 9 - In a manufacturing environment, why should the...Ch. 9 - How has the material balance shifted in the...Ch. 9 - How have different materials enabled advances and...Ch. 9 - Discuss the interrelation between engineering...Ch. 9 - What is design?Ch. 9 - What are the three primary stages of product...Ch. 9 - What are some of the features to be considered in...
Ch. 9 - What is the benefit of requiring prototype...Ch. 9 - What sequence of activities is common to nearly...Ch. 9 - Prob. 13RQCh. 9 - What is the most frequent pitfall when seeking to...Ch. 9 - What should be the first step in any materials...Ch. 9 - In what ways does the concept of shape or geometry...Ch. 9 - Prob. 17RQCh. 9 - Describe some of the possible mechanical...Ch. 9 - How might temperature enter into the specification...Ch. 9 - What are some physical properties of materials?Ch. 9 - What are some of the important aspects of the...Ch. 9 - What are some of the possible manufacturing...Ch. 9 - Why is it important to resist jumping to the...Ch. 9 - Prob. 24RQCh. 9 - What is the difference between an absolute and...Ch. 9 - Prob. 26RQCh. 9 - Prob. 27RQCh. 9 - Prob. 28RQCh. 9 - Give an example of a product or component where...Ch. 9 - What are some possible considerations relating to...Ch. 9 - Prob. 31RQCh. 9 - Prob. 32RQCh. 9 - Prob. 33RQCh. 9 - Prob. 34RQCh. 9 - Prob. 35RQCh. 9 - Why might material selection and process selection...Ch. 9 - Give an example of where selection of a material...Ch. 9 - Why is it likely that compromise, opinion, and...Ch. 9 - Why is it likely that multiple individuals will be...Ch. 9 - Why should the design and manufacture of a...Ch. 9 - Give an example where an unexpected problem might...Ch. 9 - Prob. 42RQCh. 9 - What are some of the different types of useful...Ch. 9 - How have high�speed, high�capacity computers...Ch. 9 - Prob. 1PCh. 9 - The chalk tray on a classroom chalkboard has very...Ch. 9 - Prob. 3PCh. 9 - Examine the properties of wood, aluminum, and...Ch. 9 - Automobile body panels have been made from carbon...Ch. 9 - Prob. 6PCh. 9 - Go to the local hardware or building supply store...Ch. 9 - Prob. 8PCh. 9 - Decorative fence posts for a residential home have...Ch. 9 - The individual turbine blades used in the exhaust...Ch. 9 - Prob. 11PCh. 9 - Hockey sticks are currently available in wood,...Ch. 9 - The 2019 Corvette C8 has moved to a mid�engine,...Ch. 9 - What is the normal use or uses of this product or...Ch. 9 - Prob. 2CSCh. 9 - Prob. 3CSCh. 9 - Prob. 4CSCh. 9 - Prob. 5CSCh. 9 - Prob. 6CSCh. 9 - Would there be any concerns relating to...
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- a) Answer the following true/ false questions. Each question is ) When one dimension of structure is much longer than the others, the strain in that direction can be negligible. ) Buckling is the critical failure mode when Euler beams are subjected to very larger compressive stress than the yield strength. ) Fatigue failure of the structure occurs due to the sudden impact load. ) The reliability of products always decreases with respect to time or cycles with constant failure rate. () For thin-walled pressure vessels, the stresses in the thickness direction can be negligible. ) The stress concentration occurs due to the geometric discontinuity but does not depend on the type of loads. ) Based on the fracture mechanics theory, the structural failure always occurs due to the presence of cracks or defects. () In general, failure of ductile materials occurs in the principle plane due to the principle stresses. () Ultimate strengths of brittle materials are always smaller than those of…arrow_forwardMetal work: What are possible sources of error in trying to obtain a specific hardness or strength?arrow_forwardmaterials, properties and testing Describe the working and environmental conditions that lead to failure for a product made from material from each of the following categories: silicon nitride fibreglass carbon fibre steelarrow_forward
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