Thinking Like an Engineer: An Active Learning Approach (4th Edition)
4th Edition
ISBN: 9780134639673
Author: Elizabeth A. Stephan, David R. Bowman, William J. Park, Benjamin L. Sill, Matthew W. Ohland
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 1, Problem 11RQ
- 11. What type of engineer is most likely to work on designing the fiber orientation of a composite for a new carbon fiber airplane?
- A. An
industrial engineer - B. A
mechanical engineer - C. A materials engineer
- D. An electrical engineer
- A. An
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
119) fiber orientation in composite material is (which)I. one-dimensional continuous fibersII. planar continuous fibers in the form of woven fabricIII. random discontinuous fibersA. only IB. I AND IIC. All of them
D.II and III
121) Between the phases of the composite material, intermediate and intermediate phases are like which of the following?A. Direct adhesion between primary and secondary phasesB. Interphase formation between primary and secondary phases by addition of third component for adhesionC. Formation of interphase by dissolving primary and secondary gases at their own boundariesA. A and cB. Only aC. only cD.B.E. All
a) Determine the modulus of elasticity of the fibers.
b) Estimate their modulus of toughness.
c) Estimate their modulus of resilience.
Which statement is correct regarding the structure of polymers?
a. Increasing the degree of crystallinity generally increases polymer strength, elastic modulus, and ductility in semi-crystalline polymers
b. Amorphous & semi-crystalline polymers have lower strength than crystalline polymers
c. Semi-crystalline polymers are heat treated to increase the crystallinity and improve polymer strength
d. The tendency of a polymer to crystallize increases with increasing molecular weight
e. Strength increases at higher temperatures as the material softens
f. It is desirable to have a ductile-to-brittle transition temperature below room temperature
g. Degree of crystallinity and elongation at break have an inverse relationship
Chapter 1 Solutions
Thinking Like an Engineer: An Active Learning Approach (4th Edition)
Ch. 1 - 1. Which of these is closest to the definition of...Ch. 1 - 2. Which sentence best describes someone who is...Ch. 1 - 3. Which sentence best describes someone who is...Ch. 1 - 4. How do you Know you have chosen the right...Ch. 1 - 5. What is the goal of the Nitrogen Cycle Grand...Ch. 1 - Synthetic (human caused) conversion of nitrogen...Ch. 1 - 7. What type of engineer is likely to work on...Ch. 1 - 8. Which engineering field is primarily concerned...Ch. 1 - 9. What type of engineers are most likely to...Ch. 1 - 10. What engineer would be most likely to work on...
Knowledge Booster
Learn more about
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
- d) A carbon fibre reinforced composite is made using a volume fraction of 77% carbon. The material properties of the constituent materials are listed below: E (GPa) Strength (MPa) 1500 900 Carbon fibre Epoxy 60 3 The composite is loaded in tension and a Young's modulus of 12.9GPa is measured. Is this the maximum modulus the composite can experience? Explain your answer. For a modulus of 12.9GPa, can the strength be estimated? Explain your answer. Relevant formulae: (4 marks) 1 E Vf E₁ 'm Em E = EfVf + EmVm o = ofV₁ + 0mVm +arrow_forwardWhich statement is correct regarding the structure of polymers? O a. Degree of crystallinity and elongation at break have an inverse relationship O b. Strength increases at higher temperatures as the material softens O c. The tendency of a polymer to crystallize increases with increasing molecular weight Semi-crystalline polymers are heat treated to increase the crystallinity and improve polymer strength Amorphous & semi-crystalline polymers have lower strength than crystalline polymers Increasing the degree of crystallinity generally increases polymer strength, elastic modulus, and ductility in semi-crystalline polymers O g. It is desirable to have a ductile-to-brittle transition temperature below room temperature O d. Oe. O f.arrow_forwardWhich of the following are incorrect regarding the crystallinity and mechanical behavior of polymers? a. As temperature is reduced, necking behavior of plastic tensile bars completely disappears b. Semi-crystalline polymers are heat treated to increase crystallinity and improve strength c. Heat treatment always results in enhanced polymer strength, modulus, and brittleness d. Strain softening happens in elastomers where the deformation gradually leads to a decrease in stiffness under constant strain rate e. Increasing the degree of crystallinity generally increases polymer strength, elastic modulus, and ductility in semi-crystalline polymers f. The stress-strain curve slope for totally elastic and brittle polymers is always positivearrow_forward
- What is the difference between thermoplastics and thermosets? A)Thermosets are cross-linked, thermoplastics are linear polymers. B)There is no significant difference. C)Thermoplastics cannot be melted, while thermosets can be. D)Thermoplastics are more elastic then thermosets.arrow_forward1 An engineer is to use recycled polymer in their car mirror covering. Which of the following would be the best polymer to recycle? (A) Bakelite (B) Carbon Fibre (C) Polypropylene (D) Urea Formaldehyde albe unioonign3arrow_forwardWhich of the following is incorrect regarding the degree of crystallinity of semi-crystalline polymers? (This question has more than one correct answer) a. Increasing the degree of crystallinity generally increases polymer strength, elastic modulus and ductility in semi-crystalline polymers b. Semi-crystalline polymers are heat treated to increase the crystallinity and improve polymer strength c. The tendency of a polymer to crystalize decreases with increasing molecular weight d. Heat treatment always results in enhanced polymer strength, elastic modulus and brittlenessarrow_forward
- Which of the following is not an advantage of plastic over metal? Low thermal conductivity corrosion resistance comparatively low cost impact strengtharrow_forwardWhich statements are correct regarding the mechanical properties of polymers? a. Drawing increases alignment and strength, and decreases ductility (% elongation) b. Annealing increases alignment, strength and elastic modulus c. Increasing temperature results in increased elastic modulus and strength, and decreased elongation d. Decreasing strain rate causes decreased strength and elastic modulus and increased elongation e. A higher degree of crosslinking generally results in decreased percent elongation at break, and increases strengtharrow_forwardWhich of the following is correct regarding the degree of crystallinity of semi-crystalline polymers? Semi-crystalline polymers are heat treated to increase the crystallinity and improve polymer strength The tendency of a polymer to crystallize increases with increasing molecular weight Degree of crystallinity and tendency to creep have an inverse relationship Increasing the degree of crystallinity generally increases polymer strength, elastic modulus and ductility in semi-crystalline polymersarrow_forward
- Which of the following are incorrect regarding the crystallinity and mechanical behavior of polymers? a. Strain softening happens in elastomers where the deformation gradually leads to a decrease in stiffness under constant strain rate b. As temperature is reduced, necking behavior of plastic tensile bars completely disappears C. The stress-strain curve slope for totally elastic and brittle polymers is always positive d. Heat treatment always results in enhanced polymer strength, modulus, and brittleness e. Semi-crystalline polymers are heat treated to increase crystallinity and improve strength f. Increasing the degree of crystallinity generally increases polymer strength, elastic modulus, and ductility in semi-crystalline polymersarrow_forwardWhich of the following is not part of how the the rubber industry is organized? Question 4 options: a rubber growing plantations that produce natural rubber b petrochemical industry that produce synthetic rubber c organizations that issue industry standards d fabricators that take the NR and SR and produce finished rubber goodsarrow_forwardWhich of the following describes a bucky ball? a. plastic explosives nanoparticle b.. a carbon molecule (C60) c. a quantum dots d. a concrete nanoparticle with a comprehensive strength of 20 nanonewtonarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Elements Of ElectromagneticsMechanical EngineeringISBN:9780190698614Author:Sadiku, Matthew N. O.Publisher:Oxford University Press
Mechanics of Materials (10th Edition)Mechanical EngineeringISBN:9780134319650Author:Russell C. HibbelerPublisher:PEARSON
Thermodynamics: An Engineering ApproachMechanical EngineeringISBN:9781259822674Author:Yunus A. Cengel Dr., Michael A. BolesPublisher:McGraw-Hill Education
Control Systems EngineeringMechanical EngineeringISBN:9781118170519Author:Norman S. NisePublisher:WILEY
Mechanics of Materials (MindTap Course List)Mechanical EngineeringISBN:9781337093347Author:Barry J. Goodno, James M. GerePublisher:Cengage Learning
Engineering Mechanics: StaticsMechanical EngineeringISBN:9781118807330Author:James L. Meriam, L. G. Kraige, J. N. BoltonPublisher:WILEY
Elements Of Electromagnetics
Mechanical Engineering
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Oxford University Press
Mechanics of Materials (10th Edition)
Mechanical Engineering
ISBN:9780134319650
Author:Russell C. Hibbeler
Publisher:PEARSON
Thermodynamics: An Engineering Approach
Mechanical Engineering
ISBN:9781259822674
Author:Yunus A. Cengel Dr., Michael A. Boles
Publisher:McGraw-Hill Education
Control Systems Engineering
Mechanical Engineering
ISBN:9781118170519
Author:Norman S. Nise
Publisher:WILEY
Mechanics of Materials (MindTap Course List)
Mechanical Engineering
ISBN:9781337093347
Author:Barry J. Goodno, James M. Gere
Publisher:Cengage Learning
Engineering Mechanics: Statics
Mechanical Engineering
ISBN:9781118807330
Author:James L. Meriam, L. G. Kraige, J. N. Bolton
Publisher:WILEY
Fire Safety; Author: Toronto Metropolitan University;https://www.youtube.com/watch?v=7jCyJIJllHE;License: Standard Youtube License