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Thin composite lamina is to be made of Kevlar fibers aligned all in the same direction in elastic...
Consider a unidirectional Kevlar/Epoxy lamina. The stiffness in the fiber direction must be at least 70...
Consider a unidirectional Kevlar/Epoxy lamina. The stiffness in the fiber direction must be at least 70 GPa, and the stiffness perpendicular to the fibers must be at least 10 GPa. The modulus of the Kevlar fibers is 124 GPa, and Poisson ratio is 0.35. The modulus of the Epoxy is 3.5 GPa and Poisson ratio is 0.33. You may use the 4 design equations from Lesson 6, Slide 17. a) Write 2 simple equations that define the 2 requirements you...
A composite of polycrystalline spinel (Young's modulus = 277 GPa) and aligned continuous Kevlar fibers is...
A composite of polycrystalline spinel (Young's modulus = 277 GPa) and aligned continuous Kevlar fibers is desired in order to increase the capacity of the spinel to withstand impact. Kevlar fibers have a tensile strength of 3.6 GPa and a Young's modulus of 125 GPa. For a desired composite with Young's modulus of 200 GPa, what is the fiber volume fraction? Use isostrain condition.
Calculate the Modulus and the specific modulus (modulus/density) for a 82 vol% Kevlar/epoxy aligned fibre composite in the direction of fibre alignment. I am sure it is only these information for this...
Calculate the Modulus and the specific modulus (modulus/density)
for a 82 vol% Kevlar/epoxy aligned fibre composite in the direction
of fibre alignment.
I am sure it is only these information for this question.
Density Mg/m3
Modulus GPa
Epoxy
1.1
5
Kevlar
1.44
131
Ti alloys
4.43
114
Al alloys
2.7
70
steels
7.85
207
Calculate the Modulus and the specific modulus (modulus/density) for a 82 vol% Kevlar/epoxy aligned fi Kevlar/epoxy aligned fibre composite in the direction of fibre alignment Density...
I need to know the steps and the answer of every single question in the images....
I need to know the steps and the answer of every single question
in the images. Thank you.
2. (35 points) Calculate the elastic modulus, percentage of load and stresses in the fibers and the matrix of a composite material. The composite is made of an epoxy matrix and 20% of fibers The fibers are either (a) high modulus carbon fiber, or (b) Kevlar 29 fibers. The fibers are continuous and uniaxially aligned. The dimensions of the composite are as...
A unidirectional fiber reinforced composite is made from fibers and matrix with the following properties; (Ef=...
A unidirectional fiber reinforced composite is made from fibers and matrix with the following properties; (Ef= 400 GPa, Em = 4 GPa, modulus of elasticity of fiber and matrix respectively), (G12f= 170 GPa, Gm = 1.43 shear modulus of fiber and matrix), (V12f = 0.2, Vm = 0.4 for Poisson ratios of fiber and matrix respectively). a) Estimate the modulus of elasticity of a unidirectional lamina loaded along the fiber direction. b) Estimate the modulus of elasticity of a unidirectional...
Consider a single lamina of unidirectional kevlar-epoxy with a fiber orientation angle of 55 degress ....
Consider a single lamina of unidirectional kevlar-epoxy with a
fiber orientation angle of 55 degress . You may use a computer or
do the calculations by hand but must show your work. Use the lamina
properties provided in Lesson 3, Slide 19 in SI units. The lamina
is loaded with stresses {x, y,
xy} = {125, -10,
20} MPa. a. Sketch a complete and useful figure for this problem,
including all relevant coordinate systems. b. Calculate the strains
in the...
Use Halpin-Tsai. A composite is made of unidirectionally aligned carbon fibers in a glass-ceramic matrix. The...
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.
Composite Structures Tutorial 7 (week 8) 7.1 Find the five strength parameters of a unidirectional glass/epoxy lamina with 40% fiber volume fraction. Use the properties of glass and ep...
Composite Structures Tutorial 7 (week 8) 7.1 Find the five strength parameters of a unidirectional glass/epoxy lamina with 40% fiber volume fraction. Use the properties of glass and epoxy from Table 3.1 and Table 3.2. Assume the fibers have circular cross-section and are in a square array packing. 1-52.0-$01674870 225 47 Find 208 Mechanics of Composite Materials, Second Edi Convert PO or Excel Orl Select PDF I TABLE 3.1 Typical Properties of Fibers (SI System of Units) Units Graphite Glass...
A continuous and aligned fiber-reinforced composite is to be produced consisting of 41 vol% aramid fibers...
A continuous and aligned fiber-reinforced composite is to be produced consisting of 41 vol% aramid fibers and 59 vol% of a polycarbonate matrix; mechanical characteristics of these two materials are as follows: Modulus of Elasticity [GPa (psi)] Tensile Strength [MPa (psi)] Aramid fiber 131 (19 × 106) 3600 (520,000) Polycarbonate 2.4 (3.5 × 105) 65 (9425) Assume that this composite has a cross-sectional area of 320 mm2 (0.50 in.2) and is subjected to a longitudinal load of 49700 N (11200...
6.1 A simply supported laminated composite beam (Figure 6.6) made of glass/epoxy is 75 mm long an...
6.1 A simply supported laminated composite beam (Figure
6.6) made of glass/epoxy is 75 mm long and has the layup of
[±30]2s. A uniform load is applied on the beam that is 5 mm in
width. Assume each ply is 0.125 mm thick and the properties of
glass/epoxy are from Table 2.1.
1. What is the maximum deflection of the
beam?
2. Find the local stresses at the top of the
laminate.
q- 100 N/m 0.075 m FIGURE 6.6 Uniformly...
Consider a unidirectional Kevlar/Epoxy lamina. The stiffness in the fiber direction must be at least 70 GPa, and the stiffness perpendicular to the fibers must be at least 10 GPa. The modulus of the Kevlar fibers is 124 GPa, and Poisson ratio is 0.35. The modulus of the Epoxy is 3.5 GPa and Poisson ratio is 0.33. You may use the 4 design equations from Lesson 6, Slide 17. a) Write 2 simple equations that define the 2 requirements you...
A composite of polycrystalline spinel (Young's modulus = 277 GPa) and aligned continuous Kevlar fibers is desired in order to increase the capacity of the spinel to withstand impact. Kevlar fibers have a tensile strength of 3.6 GPa and a Young's modulus of 125 GPa. For a desired composite with Young's modulus of 200 GPa, what is the fiber volume fraction? Use isostrain condition.
Calculate the Modulus and the specific modulus (modulus/density)
for a 82 vol% Kevlar/epoxy aligned fibre composite in the direction
of fibre alignment.
I am sure it is only these information for this question.
Density Mg/m3
Modulus GPa
Epoxy
1.1
5
Kevlar
1.44
131
Ti alloys
4.43
114
Al alloys
2.7
70
steels
7.85
207
Calculate the Modulus and the specific modulus (modulus/density) for a 82 vol% Kevlar/epoxy aligned fi Kevlar/epoxy aligned fibre composite in the direction of fibre alignment Density...
I need to know the steps and the answer of every single question
in the images. Thank you.
2. (35 points) Calculate the elastic modulus, percentage of load and stresses in the fibers and the matrix of a composite material. The composite is made of an epoxy matrix and 20% of fibers The fibers are either (a) high modulus carbon fiber, or (b) Kevlar 29 fibers. The fibers are continuous and uniaxially aligned. The dimensions of the composite are as...
A unidirectional fiber reinforced composite is made from fibers and matrix with the following properties; (Ef= 400 GPa, Em = 4 GPa, modulus of elasticity of fiber and matrix respectively), (G12f= 170 GPa, Gm = 1.43 shear modulus of fiber and matrix), (V12f = 0.2, Vm = 0.4 for Poisson ratios of fiber and matrix respectively). a) Estimate the modulus of elasticity of a unidirectional lamina loaded along the fiber direction. b) Estimate the modulus of elasticity of a unidirectional...
Consider a single lamina of unidirectional kevlar-epoxy with a
fiber orientation angle of 55 degress . You may use a computer or
do the calculations by hand but must show your work. Use the lamina
properties provided in Lesson 3, Slide 19 in SI units. The lamina
is loaded with stresses {x, y,
xy} = {125, -10,
20} MPa. a. Sketch a complete and useful figure for this problem,
including all relevant coordinate systems. b. Calculate the strains
in the...
Composite Structures Tutorial 7 (week 8) 7.1 Find the five strength parameters of a unidirectional glass/epoxy lamina with 40% fiber volume fraction. Use the properties of glass and epoxy from Table 3.1 and Table 3.2. Assume the fibers have circular cross-section and are in a square array packing. 1-52.0-$01674870 225 47 Find 208 Mechanics of Composite Materials, Second Edi Convert PO or Excel Orl Select PDF I TABLE 3.1 Typical Properties of Fibers (SI System of Units) Units Graphite Glass...
6.1 A simply supported laminated composite beam (Figure
6.6) made of glass/epoxy is 75 mm long and has the layup of
[±30]2s. A uniform load is applied on the beam that is 5 mm in
width. Assume each ply is 0.125 mm thick and the properties of
glass/epoxy are from Table 2.1.
1. What is the maximum deflection of the
beam?
2. Find the local stresses at the top of the
laminate.
q- 100 N/m 0.075 m FIGURE 6.6 Uniformly...
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