Using the Ashby diagram provided (also in class) which polymer material has the highest operating temperature

Q: Define the term Elastoplastic?

A: Elastoplastic stress is defined as the stress between the elastic stress and its breaking stress of…

Q: TQ8: The hull of the space shuttle consists of ceramic tiles bonded to an aluminium skin. Discuss…

A: TQ11: You would like to be able to identify different materials without resorting to chemical…

Q: Bakelite is an example of polymer. Select one: O Thermoset O Thermoplastic O Composite O Elastomers

A: The rigid type of plastic which is highly resistant to high temperature form the Bakelite.

Q: If the application temperature is about 900 C, and strength requirement is between 100 ksi~150 ksi

A: We can obtain the required zone by drawing perpendiculars at the respective coordinates , to get the…

Q: Using the aid of a diagram, describe the behaviour stress vs strain of a brittle polymer. Give one…

A: Polymer is known for its inherent toughness and resistance to fracture .mechanical properties of…

Q: a) Calculate the degree of Polymerization when an average molecular weight of a Polymer is 23040…

A: The molar mass of the the monomer C8H8O4 can be calculated as : ⇒molar mass =8×mass of carbon…

Q: Answer the following questions. i) Write down the important properties of polymers. : ii) What do…

A: (i) Important properties of the polymers. The non-conducting property. Polymers act as good…

Q: There are a variety of models that can be used to describe viscoelastic behaviors. In which of the…

A: Viscoelasticity is the property where a material behaves like both liquid as well as solid. When a…

Q: A discontinuous fibre reinforced composite consists of 20mm long carbon fibres in a polymer matrix.…

A: Given: Fiber length: L = 20 mmVolume fraction of the composite: Vf = 0.5Interfacial shear strength:…

Q: The density of an unknown polymer is 1.875 g/cm³ with a % crystallinity of 50%. If the density when…

A: To find: The density of unknown polymer when totally crystalline and density when the crystallinity…

Q: Please calculate UD composite material averaged mechanical constants EL; Er; VEr; Gu Fiber and…

A:

Q: When a viscoelastic material is loaded and unloaded, the unloading curve is different to the loading…

A: The stress-strain curve of a viscoelastic material exhibits hysteresis, with the area of the loop…

Q: An unknown polymer sample was found to have the following molecular weight distribution: Molecular…

A: The DOP tells us the number of monomer units in the given polymerization reaction.

Q: Give an approximate value for the tensile strength of a Boron/Aluminum composite with Vf = 0.4.…

A: The matrix is aluminum and fibers are of boron. The volume fraction of fiber is Vf=0.4. The elastic…

Q: Calculate the modulus of rigidity (shear modulus) of an epoxy resin if the modulus of elasticity…

A: Given   Young's Modulus, E = 3.5 GPa             Poisson ratio = 0.35 Find  Modulus of rigidity, G

Q: Briefly explain the shortcomings of a Maxwell mechanical model in describing the real behaviour of…

A: The Maxwell model is one of the simple idealizations of describing the real behavior of polymeric…

Q: Suppose you're selecting materials for a frictional braking system which will be used to bring a…

A:

Q: sketch the generalized stress-strain curve for a semi-crystalline thermoplastic polymer.

A: Solution:   The Generalized stress-strain curve with points labeled for a semi-crystalline…

Q: A design uses E> 100 GPa and M = 0ʻ/e > 100 MPa²/GPa. You are required to analyse and select the…

A: We will mark the necessary regions

Q: Kindly solve it completely by hand if possible.

A: Step 1: Calculate the mid-point of each molecular weight range First, we will find the mid-point of…

Q: For a given polymer, the activation energy for the stress relaxation was measured to be 59kj/mol. If…

A: Given:Activation energy for the stress relaxation,Q = 59 kJ/mol or 59000 J/molInitial temperature,…

Q: Explain how macroscopic hardening occurs in semicrystalline polymers from the point of view of…

A: Introduction: Strain hardening is not basically affected by the degree of crystallinity. In…

Q: 3. An engineering ceramic has a flexure strength that obeys Weibull statistics with m = 15. If the…

A: Data given-  m = 15  Pf1 = 0.3  Ps1 = 1-0.3 = 0.7  Ps2 = 0.4

Q: When choosing a polymer for fatigue crack propagation resistance, would you typically select an…

A: Semi molecular polymers have more endurance limit in crack propagation. One explanation is the…

Q: A steel plate used for polymer forming is to be bent into a circular shape having an inside radius…

A:

Q: How is the characteristics of the stress-strain curve of concrete under axial compression?Please…

A: The stress-Strain curve for the concreate under axial compression loading is as shown in the above…

Q: Identify which is typically tougher: a semicrystalline or an amorphous polymer.

A: The difference between the given polymer types lies in their molecular structure. Amorphous material…

Q: An old composite product of a company is comprised of 40 vol% fibre with the Young's modulus (E =…

A: Objective:Identify which of the following statement is false regarding the replacement if Young's…

Q: A new composite material is to be manufactured from carbon fibre and resin component materials. The…

A: Given data: EC=8.25 GPaEf=142 GPaER=5.42 GPa Need to determine the relative volume fraction of…

Q: 3. A polymer sample of height 700 cm with an area of 6 m2 supports a mass of 70 tons. Youngs modulus…

A:

Q: Q2) Find the ultimate longitudinal tensile strength for a graphite/epoxy lamina with a 60% fiber…

A:

Q: Composite materials must contain more dispersed material and less matrix material. Select one: O…

A: The matrix phase of a composite fabric may be a metal, a polymer or ceramic. Matrix stage is…

Q: In comparison with a brittle polymer, a ductile polymer yields and then breaks at a higher stress…

A: The graphed stress and strain of a material or metal is represented by a stress-strain curve. In…

Q: What is an important consequence of time-temperature equivalence for testing of polymer…

A: Time-temperature superposition is a method that has become important in the field of polymers to…

Q: What are the different types of Plastic Materials? Discuss each briefly (at least 4 types)

A: There are 7 different types of plastic materials are there They are: Acrylic or Polymethyl…

Q: Find the maximum biaxial stress,0x= -20, oy= -30, o > 0, that one can apply to a 60° lamina of…

A:

Q: Relate the changes of mechanical properties of polymer if the temperature increase. I. Decrease…

A: Concept: 1) Here they asked about mechanical properties, so youngs modulus and tensile strength will…

Q: The tensile modulus of a given polymer increases as its crystallinity increases"

A:

Q: A manufacturer plant to produce a new thermoplastic product. Select a suitable processing method…

A: Given:- Thermoplastic products   To find:- Manufacturing method used for thermoplastic product

Q: which test(izod or charpy or fracture toughness) is better for doing impact test on thermset…

A: Impact tests are used to check the strength and the durability of the material under stress…

Q: Find the differences between thermoplastic and thermoset in terms of i. Recycle ability ii. Hardness…

A: Given :  The differences between thermoplastic and thermoset in terms of i. Recycle abilit ii.…

Q: A polymer has creep behaviour that can be represented as a power law equation: E = 0 (Jo + Jit")…

A: Stress is characterized as power per unit region inside materials that emerge from remotely applied…

Q: Various patterns of loading continuously aligned fiber-reinforced composites with the help of…

A: The loading pattern of fiber

Q: A continuous 20meter long cable tray must be installed in an aircraft compartment. The tray must…

A: The trays are made of steel, aluminium and resin reinforced plastic. Resin reinforced plastic trays…