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 39, Problem 21RQ
Why are butt joints unattractive for adhesive bonding?
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An aluminum rod of length L
=
1m has mass density p = 2700 kg and
Young's modulus E = 70 GPa. The rod is fixed at both ends. The exact
natural eigenfrequencies of the rod are wexact
E
=
√
ρ
for n=1,2,3,. . . .
1. What is the minimum number of linear elements necessary to
determine the fundamental frequency w₁ of the system? Discretize
the rod in that many elements of equal length, assemble the global
system of equations KU = w² MU, and find the fundamental
frequency w₁. Compute the relative error e₁ = (w1 - wexact) /w exact
Sketch the fundamental mode of vibration.
2. Use COMSOL to solve the same problem. Show the steps necessary
to find the fundamental frequency and mode of the rod. What is the
relative error using linear elements and a normal mesh?
A ball with a mass of 5.0 kg is hanging from a string and is initially at rest.
A bullet with a mass of 10.0 g and a velocity of 200.0 m/s is fired at the ball.
The bullet embeds itself inside the ball.
How high (h) do the ball and the bullet rise?
Gravitational acceleration: g=9.81g = 9.81g=9.81 m/s².
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Mechanical engineering
Chapter 39 Solutions
Degarmo's Materials And Processes In Manufacturing
Ch. 39 - What would be some of the characteristics of an...Ch. 39 - What are some of the applications of adhesives in...Ch. 39 - What are some of the types of materials that have...Ch. 39 - What are some of the ways in which adhesives can...Ch. 39 - What is a structural adhesive?Ch. 39 - Prob. 6RQCh. 39 - What are some of the limiting characteristics of...Ch. 39 - What promotes the curing of cyanoacrylates? Of...Ch. 39 - Urethane adhesives might be favored when what...Ch. 39 - What features or characteristics might favor the...
Ch. 39 - How can the use of hot-melt adhesives be combined...Ch. 39 - What property enhancement characteristic is...Ch. 39 - What features or properties are provided or...Ch. 39 - What are some types of nonstructural or special...Ch. 39 - How can polymeric adhesives he made electrically...Ch. 39 - What types of radiation can be used with...Ch. 39 - What are some of the temperature considerations...Ch. 39 - What are some of the environmental conditions that...Ch. 39 - What is the difference between a...Ch. 39 - Why is it desirable for adhesive joints to be...Ch. 39 - Why are butt joints unattractive for adhesive...Ch. 39 - What types of joints provide large bonding areas?Ch. 39 - How does the strength of an adhesive joint vany...Ch. 39 - What are some common techniques by which surfaces...Ch. 39 - How can destructive testing and the examination of...Ch. 39 - Why are the structural adhesives an attractive...Ch. 39 - In view of the relatively low strengths of the...Ch. 39 - Why might an adhesive joint provide enhanced...Ch. 39 - What are some of the other attractive properties...Ch. 39 - In what ways might a structural adhesive offer...Ch. 39 - Why are adhesive joints unattractive for...Ch. 39 - Describe some of the ways that structural...Ch. 39 - What are some other common limitations to...Ch. 39 - What is weld bonding?Ch. 39 - What are some common types of mechanical...Ch. 39 - What factors would influence the selection of a...Ch. 39 - What types of fasteners are attractive if the...Ch. 39 - What factors determine the overall effectiveness...Ch. 39 - What is an integral fastener? Provide an example.Ch. 39 - What are some of the primary types of discrete...Ch. 39 - Prob. 41RQCh. 39 - What are some of the major assets of mechanical...Ch. 39 - What are some of the ways that fastener holes can...Ch. 39 - What is the benefit of a self-tapping fastener?Ch. 39 - What are some of the common causes for failure of...Ch. 39 - What are galvanic corrosion problems common when...Ch. 39 - From a manufacturing viewpoint, why is it...Ch. 39 - What are some of the ways that plastics can be...Ch. 39 - Why can the thermoplastic polymers be welded, but...Ch. 39 - Prob. 50RQCh. 39 - Describe several of the plastic joining processes...Ch. 39 - Prob. 52RQCh. 39 - How can metal inserts be used to produce welds in...Ch. 39 - Prob. 54RQCh. 39 - What is the difference between direct laser...Ch. 39 - Give an everyday example of solvent welding.Ch. 39 - What material property enables snap-fits to be a...Ch. 39 - Why are the crystalline ceramic materials...Ch. 39 - Prob. 59RQCh. 39 - Prob. 60RQCh. 39 - When materials are joined, interfaces are created...Ch. 39 - Some automakers are using adhesives and sealants...Ch. 39 - Select two types of additives to industrial...Ch. 39 - Identify at least five types of adhesives that...Ch. 39 - A contractor has installed aluminum siding on a...Ch. 39 - Mechanical fasteners are an attractive means of...Ch. 39 - Prob. 6PCh. 39 - Prob. 7PCh. 39 - Prob. 8PCh. 39 - Prob. 9PCh. 39 - Prob. 10PCh. 39 - You must devise a means of incorporating the...Ch. 39 - An additional joint occurs where the club head is...Ch. 39 - For production simplicity, it might be preferable...Ch. 39 - If the bonding process and resulting interface...Ch. 39 - Prob. 5CSCh. 39 - Prob. 6CS
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