Which has the highest ductility why B which is the strongest why C which is the stiffest Why?

Why? (b) Which is the strongest? Why? (c) Which is the stiffest? Why? Answers: (a) Material B will experience the greatest percent area reduction since it has the highest strain at fracture, and, therefore is most ductile.

Are plastics more ductile than metals?

The key difference between polymers and metals is that the polymers are lightweight than the metals. Also, another important difference between polymers and metals is that the metals are highly malleable and ductile whereas most of the polymers are not.

Do metal matrix composites have any advantages over reinforced plastics?

the main advantage that metal- matrix have over reinforced plastics is that they can withstand a much higher range of temperature without losing strength or degrading.

What is the principal advantage of ceramic fibers used in special applications of composites?

o 9.26 Ceramic matrix composites have been developed primarily to overcome the deficiencies of ceramic as a stand alone material. Namely, that fiber reinforcement gives ceramic a much needed boost in toughness. Ceramic was already superior for its high temperature strength and endurance capabilities. :o.

What are the primary differences between elastic anelastic and plastic deformation behaviors?

Differences between elastic and plastic deformations

Elastic Deformation	Plastic Deformation
Most solid materials display a linear stress-strain behavior within this elastic region.	Stress-strain curve is non-linear in plastic region.

Which has the largest modulus of resilience?

Copper beryllium provides the greatest deflection because of its high resilience value, and the highest contact force because of its modulus of resilience value.

Why do metals undergo ductile fracture?

Ductile fracture in metals and metallic alloys often originates from the initiation, growth, and coalescence of microscopic voids during plastic deformation [1–6]. Once the voids nucleate, further plastic deformation enlarges the size of voids and distorts the shape, which is often called void growth [7].

Why metals are more ductile than polymers?

Metals are incredibly close-packed structures where atoms of a given metal are tightly bonded to one another through metallic bonding. In polymers, molecules can be very long and branched in shape, meaning they cannot ‘fit’ together very well. They are therefore not as closely packed, and so are not as dense as metals.

What are the advantages of metal matrix composites?

The advantages of MMCs over polymer matrix composites are:

• Higher temperature capability.
• Fire resistance.
• Higher transverse stiffness and strength.
• No moisture absorption.
• Higher electrical and thermal conductivities.
• Better radiation resistance.
• No outgassing.

Do any properties degrade when metals are reinforced with fibers?

which degrade when metals are reinforced with fibers? Yes, they may have reduced ductility and fracture toughness.

Where and why Fibre reinforced composites are useful?

The main reasons for using FRPC are the lightweight design potential, the adjustable deformation behavior, good corrosion resistance, and low electrical conductivity depending on the fiber material. Applications are therefore primarily found in the aerospace, automotive, medical technology, energy, and sports sectors.

Why are metals ductile while ceramics are brittle?

Metals are ductile as they can be beaten into thin wires but ceramics are having calcium as one of its component which is a non metal and non metal don’t possess the property of ductility. Originally Answered: Why are metals ductile, whereas ceramics are brittle?

Why are most of the metals ductile?

Most of the metals are ductile because the dislocations can easily glide on crystallographic planes during deformation. The metallic bonds are weak enough so that dislocations can easily break bonds and reform bonds during motion. As long as the dislocations move the material deform plastically.

What determines the microstructure and properties of ceramics?

Electronic structure and atomic bonding determine microstructure and properties of ceramic and glass materials. Two types of bonds are found in ceramics: ionic and covalent. The ionic bond occurs between a metal and a nonmetal, in other words, two elements with very different electronegativity.

What type of chemical bonds are found in ceramics?

Two types of bonds are found in ceramics: ionic and covalent. The ionic bond occurs between a metal and a nonmetal, in other words, two elements with very different electronegativity.