[Materials Engineering] An endovascular stent graft is a fabric tube supported by a metal mesh. It isimplanted inside the thoracic aorta to help reinforce the blood vessel. Identify two (2) biomaterialsused each for the stent portion and the graft portion of endovascular stent graft.

Biomaterials can be found in nature or created in the lab using a number of chemical methods that…

Answered: [Materials Engineering] An endovascular…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Which 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 positive
Which 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 strength
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 polymers
Explain (i) thermal conductivity (ii) composite wall (iii) diffusion
solve 30-40 minutes hand written asap..i'll rate
Can someone assist me please? Thanks.
What is the difference between thermoplastics and thermosets? Select one: O a. There is no significant difference. O b. Thermosets are cross-linked, thermoplastics are linear polymers. O c. Thermoplastics are more elastic then thermosets. O d. Thermoplastics cannot be melted, while thermosets can be.
From the attached image. Annotate and explain the phases of the polymer stress-strain curve.
Use brief sentences, sketches or calculations to answer the following questions:
Composite materials represent important part of engineering materials and their use is on the rise for high performance engineering applications. You will need to choose one engineering composite system and critically describe the production method. Support your answer with relevant data and ICT graphs.
Describe the structural differences between Kevlar and Nomex (both aramids) that are responsible for their different mechanical characteristics.
An unknown polymer sample was found to have the following molecular weight distribution: Molecular weight range 8,000 - 20,000 20,000 - 32,000 32,000 - 44,000 44,000 - 56,000 56,000 -68,000 68,000 -80,000 80,000 - 92,000 Having a DP=763, which of the following common polymers is this sample? Xi 0.05 0.15 0.21 0.28 0.18 0.10 0.03 Wi 0.02 0.08 0.17 0.29 0.23 0.16 0.05 Select one: O a. Polymethylmethacrylate with a monomer molecular weight of 100.121 g/mol O b. Polystyrene with a monomer molecular weight of 104.15 g/mol Polycarbonate with a monomer molecular weight of 61.0168 g/mol O c. O d. Polyvinyl chloride with a monomer molecular weight of 62.498 g/mol Polypropylene with a monomer molecular weight of 42.08 g/mol O e.

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[Materials Engineering] An endovascular stent graft is a fabric tube supported by a metal mesh. It is implanted inside the thoracic aorta to help reinforce the blood vessel. Identify two (2) biomaterials used each for the stent portion and the graft portion of endovascular stent graft.