Manufacturing Engineering & Technology
7th Edition
ISBN: 9780133559897
Author: KALPAKJIAN
Publisher: PEARSON
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Textbook Question
Chapter 20, Problem 23QLP
Careful analysis of a rapid-prototyped part indicates that it is made up of layers with a distinct filament out-line visible on each layer. Is the material a thermoset or a thermoplastic? Explain.
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1. Do you think that Rapid Prototyping or medical scaffolding is a better application for MEX? Explain.
2. Why does the MEX process work better with amorphous polymers compared to crystalline polymers?
What typically happens to the strength level of a polymer that has undergone cold drawing? Why?
Explain how macroscopic plasticity occurs in polymers from the point of view of microscopic mechanisms (covered in the chapters indicated in the Callister book). (maximum of 3 lines, not counting the space for possible schematic figures).
Chapter 20 Solutions
Manufacturing Engineering & Technology
Ch. 20 - What is the basic difference between additive...Ch. 20 - What is stereolithography?Ch. 20 - What is virtual prototyping, and how does it...Ch. 20 - What is fused-deposition modeling?Ch. 20 - Prob. 5RQCh. 20 - Prob. 6RQCh. 20 - Explain what each of the following means: (a) 3DP,...Ch. 20 - What starting materials can be used in...Ch. 20 - What are the cleaning and finishing operations in...Ch. 20 - Which rapid-prototyping technologies do not...
Ch. 20 - What are the advantages of electron beam melting?Ch. 20 - What is the Keltool process?Ch. 20 - What is a self-replicating machine?Ch. 20 - Which rapid-prototyping operations can produce...Ch. 20 - Which rapid-prototyping operations can produce...Ch. 20 - How can a mold for sand casting be produced using...Ch. 20 - Examine a ceramic coffee cup and determine in...Ch. 20 - How would you rapidly manufacture tooling for...Ch. 20 - Explain the significance of rapid tooling in...Ch. 20 - List the processes described in this chapter that...Ch. 20 - Few parts in commercial products today are...Ch. 20 - Can rapid-prototyped parts be made of paper?...Ch. 20 - Careful analysis of a rapid-prototyped part...Ch. 20 - Why are the metal parts in three-dimensional...Ch. 20 - Make a list of the advantages and limitations of...Ch. 20 - In making a prototype of a toy automobile, list...Ch. 20 - Using an approximate cost of 400 per gallon for...Ch. 20 - The extruder head in a fused-deposition modeling...Ch. 20 - Using the data for Problem 20.28 and assuming that...Ch. 20 - Rapid-prototyping machines represent a large...Ch. 20 - One of the major advantages of stereolithography...Ch. 20 - A manufacturing technique is being proposed that...Ch. 20 - Identify the rapid-prototyping processes described...Ch. 20 - Design a machine that uses rapid-prototyping...Ch. 20 - Because of relief of residual stresses during...Ch. 20 - Prob. 37SDPCh. 20 - Prob. 39SDPCh. 20 - Prob. 40SDP
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- What are the two micro-scale plasticity mechanisms active in amorphous polymers? Are they likely to occur simultaneously? Explain.arrow_forwardWhat are the major advantages of plastic compared to ceramics. Glasses and metals?arrow_forward4ac (simply answer the question) 1.Simply explain the differences between pendant and stiffening groups in polymers. 2. What is glass transition and melting temperature? Simply explain.arrow_forward
- What are the key considerations when selecting materials for prototyping, particularly in aerospace and medical device industries?arrow_forwardExplain how macroscopic hardening occurs in semicrystalline polymers from the point of view of microscopic mechanisms (covered in the chapters indicated in the Callister's book). (maximum of 3 lines, not counting the space for possible schematic figures).arrow_forwardExplain the concept of rapid prototyping and its significance in product development. Provide examples of rapid prototyping techniques.arrow_forward
- with the use of appropriate diagrams/ structures and examples compare and contrast thermosetting plastics and thermoplastics.arrow_forwardWhat are the types of biomaterials? What is the main property of a biomaterial?arrow_forwardThe graph below gives a plot of force versus total sample length in a tensile test of a polymer. The sample is cylindrical, with an initial diameter of 1 cm and an initial length of 10 cm. From the data below, calculate the modulus, yield stress, yield strain, tensile strength, and % elongation.arrow_forward
- Can you explain elastic hysteresis in polymers with the aid of a diagram?arrow_forwardIllustrate the difference between crystalline and amorphous polymers structure and explain the effect of this difference on their properties and applications. Show examples of polymers that are not crystalline or semi-crystalline.arrow_forward1. Explain in 1-3 bullets why yield strength is used as an engineering property instead of the proportional limit. 2. Would a thermoset polymer exhibit much plastic strain? Explain why or why not in 1-3 bullets.arrow_forward
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