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A biomaterial composite is made of a polymer matrix with aligned ceramic fibre reinforcement. The composite...
Use Halpin-Tsai. A composite is made of unidirectionally aligned carbon fibers in a glass-ceramic matrix. The following data are available: Ef1 = 280 GPa, Ef2 = 40 GPa, Em = 70 GPa, νf1 = 0.2, νm = 0.3, Gf12 = 18 GPa a. Compute the elastic modulus in the longitudinal and transverse directions. b. Compute the two Poisson’s ratios. c. Compute the principal shear modulus, G12.
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
(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...
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...
QUESTION 23 The data in the table below is for glass fibre-reinforced nylon 6,6 composites. The glass fibre constitutes 42% of the total volume of these composites. Elastic Modulus Tensile Strength (GPa) (MPa) 72.5 3400 Glass fibres Nylon 6,6 3.0 76 If continuous aligned glass fibres are used, what would be the longitudinal stiffness of the composite, in GPa
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...
Q4 Acomposite consists of 65% polyester resin is reinforced by continuous and aligned glass fibers. The modulus elasticity of hardened resin is 4 0 GPa and the modulus elasticity of the ibers la 52.0 GPa. Compute: a. The overall modulus elasticity of composite in the longitudinal direction parallel 04. to fiber direction b. The load carried by each matrix and iber phase, If uniaxial srss of 50 MPa is applied in longitudinal direction on the 250 mm2 cross-sectional area. c....
Problem 8 10 pts) A continuous and aligned fiber-reinforced composite part has cross sectional area of 300 mm2 and consists of35 vol% glass fibers and 65 vol% of a nylon 6,6 matrix. If a longitudinal tensile load of 50kN is applied to the composite, determine (a) the longitudinal modulus of elasticity of the composite, (b) the longitudinal strain in the composite, (c) the stress in each phase (fiber and matrix), and (d) the magnitude of the load carried by each...
Determine the longitudinal modulus E1 and longitudinal tensile strength F1t of a unidirectional silicon carbide/ceramic composite with properties Vf =0.40 Ef = 172 GPa (25 Msi) Em=97 GPa (14 Msi) Fft = 1930 MPa (280 ksi) Fmt = 138 MPa (20 ksi) Assume linear elastic behavior for both fiber and matrix. Everything else being equal, how does the strength F1t vary with fiber modulus E1f? (Note: Strength is defined here as the composite stress at failure initiation of one of...