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Assume a composite made from a fibre volume fraction of 50% using uni directional, continuous fibres...
For an aligned carbon fibre-epoxy matrix composite having a 0.25 volume fraction of fibres, compute the...
For an aligned carbon fibre-epoxy matrix composite having a 0.25 volume fraction of fibres, compute the critical fibre length = Assuming the following: 1) an average fiber diameter of 7.80 x 10 mm 2) an average fiber length of 9.3 mm 3) a fiber fracture strength of 4.5 GPa 4) a fiber-matrix bond strength of 75 MPa 5) a matrix stress at composite failure of 6.0 MPa 6) a matrix tensile strength of 60 MPa. Express answers with three significant...
(b) For a unidirectional composite lamina with a 60% fibre volume fraction, the fibres are circular...
(b) For a unidirectional composite lamina with a 60% fibre volume fraction, the fibres are circular and are packed in a square array. Assume there is no void. The Young's modulus of the fibre is 180 GPa, the shear modulus of the fibre is 20 GPa. The Young's modulus of the matrix is 30 GPa, the shear modulus of the matrix is 4 GPa. The tensile strengths of fibre and matrix are 2000 MPa and 100 MPa separately. (1) Find...
A unidirectional continuous fibre reinforced composite is to be manufactured so that the fibres carry 90%...
A unidirectional continuous fibre reinforced composite is to be manufactured so that the fibres carry 90% of a load in the longitudinal direction. The moduli of elasticity of the fibre and matrix materials are 125 GPa and 2.6 GPa respectively. Determine: i) The volume fraction of fibres that will be required ii) The longitudinal and transverse elastic moduli of the resulting composite.
A biomaterial composite is made of a polymer matrix with aligned ceramic fibre reinforcement. The composite...
A biomaterial composite is made of a polymer matrix with aligned ceramic fibre reinforcement. The composite is deformed elastically under an applied stress of applied = 100 MPa along the longitudinal direction (i.e. parallel to the fibres). The elastic modulus of the fibre, Ef, is 200 GPa and that of the matrix, Em, is 5 GPa. The volume fraction of the fibre is Ve = 3.3%. What is the strain experienced by the composite? 0 0.05% O 0.23% 01.10% 0...
Please Answer this in full detailed as I am unable to get the full grasp of this topic a) Calculate the modulus of a cross-ply HS-carbon/epoxy laminate. Longitudinal fibre modulus (En)-230 GPa; trans...
Please Answer this in full detailed as I am unable to get the
full grasp of this topic
a) Calculate the modulus of a cross-ply HS-carbon/epoxy laminate. Longitudinal fibre modulus (En)-230 GPa; transverse fibre modulus (E122)-20 GPa; matrix modulus (En)-3 GPa; fibre volume fraction (V) : 60%. [5 marks] b)(1) Explain the difference in failure of a single fibre in air and a single fibre embedded [5 marks] in a matrix. (2) How can a test that involves the fracture...
Question B4 Carbon fibres typically have a modulus of 230 GPA, a tensile strength of 3.8 GPa and a density of 1.78...
Question B4 Carbon fibres typically have a modulus of 230 GPA, a tensile strength of 3.8 GPa and a density of 1.78 g cm3. In making composites, carbon fibres are often used with epoxy matrices that have a modulus of 3.0 GPa, a tensile strength of 60 MPa and a density of 1.3 g cm3. Which of the following is incorrect? (a) A carbon fibre/epoxy composite containing randomly oriented carbon fibres will have a lower modulus than one containing a...
It is desired to produce an aligned carbon fibre-epoxy matrix composite having a longitudinal tensile strength...
It is desired to produce an aligned carbon fibre-epoxy matrix composite having a longitudinal tensile strength of 462 MPa. Calculate the necessary volume fraction of fibres- Assume the following: (1) the average fibre diameter and length are 9.03 x 10 mm and 0.434 mm, respectively (2) the fibre fracture strength is 4.0 GPa (3) the fibre-matrix bond strength is 25 MPa (4) the matrix stress at composite failure is 70 MPa Express answers with three significant figures
Question 1. A continuous and aligned fibre-reinforced composite material is to be produced consisting of 40...
Question 1. A continuous and aligned fibre-reinforced composite material is to be produced consisting of 40 vol % glass fibres and 60 vol % of an epoxy matrix. The mechanical characteristics of these two materials are as follows: MaterialModulus of Elasticity rcture Strength (GPa) (MPa) 2500 Glass Fibre 76 Epoxy 3.35 58 For this composite material, estimate by calculation the following parameters: i. The longitudinal tensile strength ii. The longitudinal modulus of elasticity
You can choose between fibres with critical fibre lengths of 0.4, 0.8, or 1.2 mm, all...
You can choose between fibres with critical fibre lengths of 0.4, 0.8, or 1.2 mm, all of which have the same strength and stiffness. Which fibre should you choose to achieve the strongest and stiffest composite? Explain your choice. (4 marks) 15.) designing a composite using short glass fibres and an epoxy resin. You are Page 4 of 11 Mid-year Examinations, 2018 PROD111-18S1 (C) 16.) Define specific heat and thermal conductivity. Why are those two properties important for the perception...
In an aligned and continuous carbon fiber-reinforced nylon 6,6 composite, the fibers are to carry 94...
In an aligned and continuous carbon fiber-reinforced nylon 6,6 composite, the fibers are to carry 94 % of a load applied in the longitudinal direction. Modulus of Elasticity [GPa(psi)] Tensile Strength [MPa(psi)] Carbon fiber 260 (37 ×106) 4000 (5.8 ×105) Nylon 6,6 2.8 (4.0 ×105) 76 (11,000) (a) Using the data provided, determine the volume fraction of fibers that will be required. (b) What will be the tensile strength of this composite? Assume that the matrix stress at fiber failure...
For an aligned carbon fibre-epoxy matrix composite having a 0.25 volume fraction of fibres, compute the critical fibre length = Assuming the following: 1) an average fiber diameter of 7.80 x 10 mm 2) an average fiber length of 9.3 mm 3) a fiber fracture strength of 4.5 GPa 4) a fiber-matrix bond strength of 75 MPa 5) a matrix stress at composite failure of 6.0 MPa 6) a matrix tensile strength of 60 MPa. Express answers with three significant...
(b) For a unidirectional composite lamina with a 60% fibre volume fraction, the fibres are circular and are packed in a square array. Assume there is no void. The Young's modulus of the fibre is 180 GPa, the shear modulus of the fibre is 20 GPa. The Young's modulus of the matrix is 30 GPa, the shear modulus of the matrix is 4 GPa. The tensile strengths of fibre and matrix are 2000 MPa and 100 MPa separately. (1) Find...
A biomaterial composite is made of a polymer matrix with aligned ceramic fibre reinforcement. The composite is deformed elastically under an applied stress of applied = 100 MPa along the longitudinal direction (i.e. parallel to the fibres). The elastic modulus of the fibre, Ef, is 200 GPa and that of the matrix, Em, is 5 GPa. The volume fraction of the fibre is Ve = 3.3%. What is the strain experienced by the composite? 0 0.05% O 0.23% 01.10% 0...
Please Answer this in full detailed as I am unable to get the
full grasp of this topic
a) Calculate the modulus of a cross-ply HS-carbon/epoxy laminate. Longitudinal fibre modulus (En)-230 GPa; transverse fibre modulus (E122)-20 GPa; matrix modulus (En)-3 GPa; fibre volume fraction (V) : 60%. [5 marks] b)(1) Explain the difference in failure of a single fibre in air and a single fibre embedded [5 marks] in a matrix. (2) How can a test that involves the fracture...
Question B4 Carbon fibres typically have a modulus of 230 GPA, a tensile strength of 3.8 GPa and a density of 1.78 g cm3. In making composites, carbon fibres are often used with epoxy matrices that have a modulus of 3.0 GPa, a tensile strength of 60 MPa and a density of 1.3 g cm3. Which of the following is incorrect? (a) A carbon fibre/epoxy composite containing randomly oriented carbon fibres will have a lower modulus than one containing a...
It is desired to produce an aligned carbon fibre-epoxy matrix composite having a longitudinal tensile strength of 462 MPa. Calculate the necessary volume fraction of fibres- Assume the following: (1) the average fibre diameter and length are 9.03 x 10 mm and 0.434 mm, respectively (2) the fibre fracture strength is 4.0 GPa (3) the fibre-matrix bond strength is 25 MPa (4) the matrix stress at composite failure is 70 MPa Express answers with three significant figures
Question 1. A continuous and aligned fibre-reinforced composite material is to be produced consisting of 40 vol % glass fibres and 60 vol % of an epoxy matrix. The mechanical characteristics of these two materials are as follows: MaterialModulus of Elasticity rcture Strength (GPa) (MPa) 2500 Glass Fibre 76 Epoxy 3.35 58 For this composite material, estimate by calculation the following parameters: i. The longitudinal tensile strength ii. The longitudinal modulus of elasticity
You can choose between fibres with critical fibre lengths of 0.4, 0.8, or 1.2 mm, all of which have the same strength and stiffness. Which fibre should you choose to achieve the strongest and stiffest composite? Explain your choice. (4 marks) 15.) designing a composite using short glass fibres and an epoxy resin. You are Page 4 of 11 Mid-year Examinations, 2018 PROD111-18S1 (C) 16.) Define specific heat and thermal conductivity. Why are those two properties important for the perception...
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