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1. A fishing rod is made of fiberglass/epoxy composites with a circular cross R. The volume...
2. Consider unidirectionally reinforced glass/epoxy composites. The fibers are continuous and 60% by volume. The tensile...
2. Consider unidirectionally reinforced glass/epoxy composites. The fibers are continuous and 60% by volume. The tensile strength of glass fibers is 1 GPa and the Young's modulus is 70 GPa. The tensile strength of the epoxy matrixis 60 MPa and its Young's modulus is 3GPa. Compute the Young's modulus and the tensile strength of the composite in the longitudinal direction.
A3. For polymer composites reinforced polymer composites, the resultant tensile strength is largely determined by the...
A3. For polymer composites reinforced polymer composites, the resultant tensile strength is largely determined by the volume contents of fibers (as shown in the figure). If glass fibers are used for reinforcing (a) detemine the minimum volume content, Fmin, which will not cause multiple-fracture. [0.5 Marks] (b) detemine the minimum volume content, OFari, which will ensure that the strength of the composites is not less than that of neat epoxy. [0.5 Marks] an epoxy 60 GPa and tensile strenght a...
homework help. need help figuring out out to solve this problem? please show steps and box...
homework help. need help figuring out out to solve this problem?
please show steps and box answer.
Find the local stresses at the middle of the 30° ply in a [30/45] glass/ epoxy laminate that is subjected to the following mechanical and hygrothermal loads: Nr 108 lb/in.; ΔΤ -100°F; AC 500. Use the properties of a unidirectional glass/epoxy lamina given in Table 2.2 The thickness of each lamina is 0.005 m TABLE 2.2 al Mechanical Properties of a Unidirectional Lamina...
2. For a graphite/epoxy unidirectional lamina (un-oriented lamina), find the following: ,--3 MPa 1) Compliance matrix...
2. For a graphite/epoxy unidirectional lamina (un-oriented lamina), find the following: ,--3 MPa 1) Compliance matrix 2) Stiffness matrix 3) Resultant strain under the applied stresses 12-4 MP 2 MPa τ12 Typical Mechanical Properties of a Unidirectional Lamina (SI System of Units) Glass Boron/ Graphitel epoxy epoxy Property Symbol Units epoxy Fiber volume fraction Longitudinal elastic modulus E Transverse elastic modulus E, Major Poisson's ratio Shear modulus Ultimate longitudinal tensile (σ1he 0.45 0.70 10.30 7.17 GPa GPa 38.6 8.27 18.50...
It is desired to produce an aligned carbon fiber-epoxy matrix composite having a 0.16 volume fraction...
It is desired to produce an aligned carbon fiber-epoxy matrix composite having a 0.16 volume fraction of fibers. Calculate (a) the critical fiber length, and (b) the longitudinal strength of the composite (in MPa), assuming the following: (1) the average fiber diameter is 0.018 mm, (2) the average fiber length is 5.7 mm, (3) the fiber fracture strength is 2.0 GPa, (4) the fiber-matrix bond strength is 84 MPa, (5) the matrix stress at fiber failure is 27.1 MPa, (6)...
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...
QUESTION 1 A semi-crystalline nylon with a degree of crystallinity of 25% has a density of 1.5 g/cm^3. Nylon has a crystalline density of 1.8 g/cm^3. What is its amorphous density in grams per centi...
QUESTION 1 A semi-crystalline nylon with a degree of crystallinity of 25% has a density of 1.5 g/cm^3. Nylon has a crystalline density of 1.8 g/cm^3. What is its amorphous density in grams per centimeters cubed? 1 points QUESTION 2 Which defect is NOT common between metals and polymers? tie molecules vacancies screw dislocations interstitial defects 0.5 points QUESTION 3 Which one is not a characteristic of a plastic polymer? a. Low stress but very large strains b. Tensile strength...
3. A [0/90]s graphite/epoxy laminate is subjected to a tensile normal load of 1N/m in the x- dire...
3. A [0/90]s graphite/epoxy laminate is subjected to a tensile normal load of 1N/m in the x- direction (the direction parallel to the fibers in the 0° ply). Assume the thickness of each ply is 5 mm and use properties of unidirectional graphite/epoxy lamina from the table. a) Calculate the resultant strains of the laminate b) Calculate the global stresses in the laminate c) Calculate the principal stresses (stresses in material directions) of the top layer. Typical Mechanical Properties of...
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...
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...
2. Consider unidirectionally reinforced glass/epoxy composites. The fibers are continuous and 60% by volume. The tensile strength of glass fibers is 1 GPa and the Young's modulus is 70 GPa. The tensile strength of the epoxy matrixis 60 MPa and its Young's modulus is 3GPa. Compute the Young's modulus and the tensile strength of the composite in the longitudinal direction.
A3. For polymer composites reinforced polymer composites, the resultant tensile strength is largely determined by the volume contents of fibers (as shown in the figure). If glass fibers are used for reinforcing (a) detemine the minimum volume content, Fmin, which will not cause multiple-fracture. [0.5 Marks] (b) detemine the minimum volume content, OFari, which will ensure that the strength of the composites is not less than that of neat epoxy. [0.5 Marks] an epoxy 60 GPa and tensile strenght a...
homework help. need help figuring out out to solve this problem?
please show steps and box answer.
Find the local stresses at the middle of the 30° ply in a [30/45] glass/ epoxy laminate that is subjected to the following mechanical and hygrothermal loads: Nr 108 lb/in.; ΔΤ -100°F; AC 500. Use the properties of a unidirectional glass/epoxy lamina given in Table 2.2 The thickness of each lamina is 0.005 m TABLE 2.2 al Mechanical Properties of a Unidirectional Lamina...
2. For a graphite/epoxy unidirectional lamina (un-oriented lamina), find the following: ,--3 MPa 1) Compliance matrix 2) Stiffness matrix 3) Resultant strain under the applied stresses 12-4 MP 2 MPa τ12 Typical Mechanical Properties of a Unidirectional Lamina (SI System of Units) Glass Boron/ Graphitel epoxy epoxy Property Symbol Units epoxy Fiber volume fraction Longitudinal elastic modulus E Transverse elastic modulus E, Major Poisson's ratio Shear modulus Ultimate longitudinal tensile (σ1he 0.45 0.70 10.30 7.17 GPa GPa 38.6 8.27 18.50...
It is desired to produce an aligned carbon fiber-epoxy matrix composite having a 0.16 volume fraction of fibers. Calculate (a) the critical fiber length, and (b) the longitudinal strength of the composite (in MPa), assuming the following: (1) the average fiber diameter is 0.018 mm, (2) the average fiber length is 5.7 mm, (3) the fiber fracture strength is 2.0 GPa, (4) the fiber-matrix bond strength is 84 MPa, (5) the matrix stress at fiber failure is 27.1 MPa, (6)...
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...
3. A [0/90]s graphite/epoxy laminate is subjected to a tensile normal load of 1N/m in the x- direction (the direction parallel to the fibers in the 0° ply). Assume the thickness of each ply is 5 mm and use properties of unidirectional graphite/epoxy lamina from the table. a) Calculate the resultant strains of the laminate b) Calculate the global stresses in the laminate c) Calculate the principal stresses (stresses in material directions) of the top layer. Typical Mechanical Properties of...
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...
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...
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