Manufacturing Engineering & Technology
7th Edition
ISBN: 9780133128741
Author: Serope Kalpakjian, Steven Schmid
Publisher: Prentice Hall
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Textbook Question
Chapter 7, Problem 19QLP
Do polymers strain harden more than metals or vice versa? Explain.
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Chapter 7 Solutions
Manufacturing Engineering & Technology
Ch. 7 - Summarize the important mechanical and physical...Ch. 7 - What are the major differences between the (a)...Ch. 7 - List properties that are influenced by the degree...Ch. 7 - What is the difference between condensation...Ch. 7 - Explain the differences between linear, branched,...Ch. 7 - What is the glass-transition temperature?Ch. 7 - List and explain the additives commonly used in...Ch. 7 - What is crazing?Ch. 7 - What are polyblends?Ch. 7 - List the major differences between thermoplastics...
Ch. 7 - What is an elastomer?Ch. 7 - What effects does a plasticizing agent have on a...Ch. 7 - Define the following abbreviations: PMMA, PVC,...Ch. 7 - Explain why it would be advantageous to produce a...Ch. 7 - What are the differences and similarities of...Ch. 7 - Are molecular weight and degree of polymerization...Ch. 7 - Why do polymers need to be dried before...Ch. 7 - What characteristics of polymers make them...Ch. 7 - Do polymers strain harden more than metals or vice...Ch. 7 - Inspect various plastic components in an...Ch. 7 - Give applications for which flammability of...Ch. 7 - What characteristics make polymers advantageous...Ch. 7 - What properties do elastomers have that...Ch. 7 - Do you think that the substitution of plastics for...Ch. 7 - Is it possible for a material to have a hysteresis...Ch. 7 - Observe the behavior of the specimen shown in Fig....Ch. 7 - Add more to the applications column in Table 7.3.Ch. 7 - Discuss the significance of the glass-transition...Ch. 7 - Prob. 29QLPCh. 7 - Explain how cross-linking improves the strength of...Ch. 7 - Describe the methods by which the optical...Ch. 7 - How can polymers be made to conduct electricity?...Ch. 7 - Explain the reasons for which elastomers were...Ch. 7 - Give several examples of plastic products or...Ch. 7 - Describe your opinions regarding the recycling of...Ch. 7 - Explain how you would go about determining the...Ch. 7 - Compare the values of the elastic modulus, given...Ch. 7 - Why is there so much variation in the stiffness of...Ch. 7 - Explain why thermoplastics are easier to recycle...Ch. 7 - Give an example where crazing is desirable.Ch. 7 - Describe the principle behind shrink wrapping.Ch. 7 - List and explain some environmental pros and cons...Ch. 7 - List the characteristics required of a polymer for...Ch. 7 - How can you tell whether a part is made of a...Ch. 7 - As you know, there are plastic paper clips...Ch. 7 - By incorporating small amounts of a blowing agent,...Ch. 7 - In injection-molding operations (Section 19.3), it...Ch. 7 - From an environmental standpoint, do you feel it...Ch. 7 - Calculate the areas under the stressstrain curve...Ch. 7 - Prob. 50QTPCh. 7 - Prob. 51QTPCh. 7 - Estimate the number of molecules in a typical...Ch. 7 - Using strength and density data, determine the...Ch. 7 - Prob. 54QTPCh. 7 - Prob. 55SDPCh. 7 - Describe the design considerations involved in...Ch. 7 - Assume that you are manufacturing a product in...Ch. 7 - Assume you work for a company that produces...Ch. 7 - Prob. 59SDPCh. 7 - Make a list of products or parts that currently...Ch. 7 - Prob. 61SDPCh. 7 - Prob. 62SDPCh. 7 - Prob. 63SDPCh. 7 - Prob. 64SDPCh. 7 - With Table 7.3 as a guide, inspect various...
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- Explain how plastic deformation is caused in the materials.arrow_forwardCoiled springs should be very strong and stiff.Silicon nitride(Si3N4) is a strong,stiff material.would you select this material for a spring?Explain.arrow_forwardDescribe in detail about Linear Elastic Material. Please provide long details and explanation. Don't copy paste. Good answer - 2likearrow_forward
- 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).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_forwardA polymer sample of height 700 cm with an area of 6 m2 supports a mass of 70 tons. Youngs modulus of the polymer sample is found to be 60 GPa. Calculate the change in height of the polymer sample, applied stress and strain.arrow_forward
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- 1. Explain the storage and loss modulus of viscoelastic materials in your own words. 2. Show that phase lag is equal to when considering purely viscous materials. Hint: Use Equations 6.1 and 6.2 provided in the introduction along with the strain rate question = (n) is the viscosity and represents the measurement of resistance to deformation with respect to time).arrow_forwardview Elastic Recovery After Plastic Deformation 5. A cylindrical specimen of a brass alloy 7.5 mm (0.30 in.) in diameter and 90.0 mm (3.54 in.) long is pulled in tension with a force of 6000 N (1350 lbf); the force is subsequently released. (a) Compute the final length of the specimen at this time. The tensile stress-strain behavior for this alloy is shown in Figure below. (b) Compute the final specimen length when the load is increased to 16,500 N (3700 lbf) and then released. 500 Stress (MPa) 400 300 200 100 Tensile strength 450 MPa (65,000 psi) MPa 200 100 0.10 I I 10³ psi 40 30 20 10 0.20 Strain 0.005 T Yield strength 250 MPa (36,000 psi) 0.30 1 70 60 50 40 30 20 10 0 0.40 Stress (10³ psi)arrow_forwardDraw a qualitative engineering stress-engineering strain curves for a ductile Polymer,a ductile metal, a ceramic, a glass and natural rubber. Label carefully and rationalize your sketch for each material.arrow_forward
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