Homework Answers
Youngs modulus (E) for metal (Ductile material), Ed = 320 MPa/0.4 = 800 MPa
Youngs modulus (E) for epoxy (Brittle material) Eb= 10 MPa/0.05 = 200 MPa
Therefore, Ed > Eb.
In case of Brittle materials, UTS and fracture limit are equal to yield strength as there is no yielding in case of brittle materials . Hence, the youngs modulus is far less (25%) when compared to a ductile material.
In case of metal-matrix composite, the ductile nature of metal leads to offering more bending strength and epoxy brittle nature gives toughness.
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The post-yield behavior of the metal and matrix are as follows: The metal is ductile and...
For the plane stress element below, assume that the material is: a) ductile plastic with yield...
For the plane stress element below, assume that the material is: a) ductile plastic with yield strength of 135 MPa. b) brittle plastic with ultimate strength of 50 MPa in tension and 300 MPa in compression. Determine if material a) or b) fails 90 MPa 60 MPa Х - 20 MPa
Will rate if everything is complete. In the space below, sketch the generalized stress-strain behavior for...
Will rate if everything is complete.
In the space below, sketch the generalized stress-strain behavior for a typical metal, such as annealed brass. On your sketch, clearly identify each of the metal, such as annealed brass. On your sketch, clearly identify each of the following. a. 0.2% offset yield strength b. Young's modulus c. Proportional limit d. Ultimate tensile strength Onset of localized plastic deformation е. f. Region of uniform plastic deformation g. Fracture strength h. Ductility i. Toughness Modulus...
Question 4: (A) The ductile behavior of a certain metal is well described by o =...
Question 4: (A) The ductile behavior of a certain metal is well described by o = 100000€0.3. The metal undergoes uniform work hardening process to a reduction in area of r= 30%, find the yield stress of the work-hardened metal. (5 marks] (B) If the metal in Q4A, governed by the same ductile behavior equation, is cold-worked first by 20% which is still followed by an additional cold work of 15%, find the yield stress of the metal. [10 marks]...
Question 6: A new generation of fiber-matrix composite is designed for the manufacturing of a med...
Question 6: A new generation of fiber-matrix composite is designed for the manufacturing of a medical examination table. It is desired to produce an aligned carbon fiber-epoxy matrix composite having a longitudinal tensile strength of 550 MPa. Calculate the volume fraction of fibers necessary if the average fiber diameter and length are 0.02 mm and 0.6 mm, respectively, the fiber fracture strength is 4.5 GPa, the fiber-matrix bond strength is 27 MPa, and the matrix stress at composite failure is...
Please provide me clear handwriting Table 1: TENSILE TEST RESULTS OF A METAL SAMPLE with d...
Please provide me clear handwriting
Table 1: TENSILE TEST RESULTS OF A METAL SAMPLE with d = 7.42, lo = 40mm (4 marks) Load, KN Extension, mm Stress, MPa Strain 0 0 10 0.05 17 0.08 25 0.11 30 0.14 34 0.20 37.5 0.40 38.5 0.60 36 0.90 Cross-sectional Area (A) Modulus of Elasticity (E) Tensile Strength (ST) Percent Elongation (%EL) A = T d2 4 E = Sy Ey ST = PU A %EL = Extension at fracture Gauge...
6 a) b) c) The most important parameter that is an indication of a material's resistance...
6 a)
b)
c)
The most important parameter that is an indication of a material's resistance to deflection (eg. in beams) arising from mechanical loads is O Tensile strength O %elongation O impact toughness O ductility Yield strength o Kic Endurance limit OE The yield strength of a steel used in construction is ~ 800 MPa. The endurance limit of this steel is ~ 0.2 800 MPa 40% O 400 MPa O 1600 MPa O 200 MPa 0.4 MPa 4...
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
manifactoring processes 1) Sketch Engineering stress vs. Engineering strain curve and True stress vs. true strain...
manifactoring processes 1) Sketch Engineering stress vs. Engineering strain curve and True stress vs. true strain curve from one uniaxial tension test for an engineering metals that shows power law strain hardening (e.g. aluminum or steel), within the same plot, and identify, from the curves, the material property parameters of: Yield strength (0.2% offset) Uniform engineering strain ultimate tensile strength (eng.) true stress and true strain at the onset of necking K and n from power-law fitting (the range of...
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...
Chapter 16, Problem 16.17 Compute the longitudinal tensile strength of an aligned glass fiber-epoxy matrix composite...
Chapter 16, Problem 16.17 Compute the longitudinal tensile strength of an aligned glass fiber-epoxy matrix composite in which the average fiber diameter and length are 0.0135 mm (0.53 x 10-4 in.) and 1.58 mm (0.062 in.), respectively, and the volume fraction of fibers is 0.33. Assume that (1) the fiber-matrix bond strength is 100 MPa (14,500 psi), (2) the fracture strength of the fibers is 3500 MPa (5 x 105 psi), and (3) the matrix stress at composite failure is...
For the plane stress element below, assume that the material is: a) ductile plastic with yield strength of 135 MPa. b) brittle plastic with ultimate strength of 50 MPa in tension and 300 MPa in compression. Determine if material a) or b) fails 90 MPa 60 MPa Х - 20 MPa
Will rate if everything is complete.
In the space below, sketch the generalized stress-strain behavior for a typical metal, such as annealed brass. On your sketch, clearly identify each of the metal, such as annealed brass. On your sketch, clearly identify each of the following. a. 0.2% offset yield strength b. Young's modulus c. Proportional limit d. Ultimate tensile strength Onset of localized plastic deformation е. f. Region of uniform plastic deformation g. Fracture strength h. Ductility i. Toughness Modulus...
Question 4: (A) The ductile behavior of a certain metal is well described by o = 100000€0.3. The metal undergoes uniform work hardening process to a reduction in area of r= 30%, find the yield stress of the work-hardened metal. (5 marks] (B) If the metal in Q4A, governed by the same ductile behavior equation, is cold-worked first by 20% which is still followed by an additional cold work of 15%, find the yield stress of the metal. [10 marks]...
Question 6: A new generation of fiber-matrix composite is designed for the manufacturing of a medical examination table. It is desired to produce an aligned carbon fiber-epoxy matrix composite having a longitudinal tensile strength of 550 MPa. Calculate the volume fraction of fibers necessary if the average fiber diameter and length are 0.02 mm and 0.6 mm, respectively, the fiber fracture strength is 4.5 GPa, the fiber-matrix bond strength is 27 MPa, and the matrix stress at composite failure is...
Please provide me clear handwriting
Table 1: TENSILE TEST RESULTS OF A METAL SAMPLE with d = 7.42, lo = 40mm (4 marks) Load, KN Extension, mm Stress, MPa Strain 0 0 10 0.05 17 0.08 25 0.11 30 0.14 34 0.20 37.5 0.40 38.5 0.60 36 0.90 Cross-sectional Area (A) Modulus of Elasticity (E) Tensile Strength (ST) Percent Elongation (%EL) A = T d2 4 E = Sy Ey ST = PU A %EL = Extension at fracture Gauge...
6 a)
b)
c)
The most important parameter that is an indication of a material's resistance to deflection (eg. in beams) arising from mechanical loads is O Tensile strength O %elongation O impact toughness O ductility Yield strength o Kic Endurance limit OE The yield strength of a steel used in construction is ~ 800 MPa. The endurance limit of this steel is ~ 0.2 800 MPa 40% O 400 MPa O 1600 MPa O 200 MPa 0.4 MPa 4...
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
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...
Chapter 16, Problem 16.17 Compute the longitudinal tensile strength of an aligned glass fiber-epoxy matrix composite in which the average fiber diameter and length are 0.0135 mm (0.53 x 10-4 in.) and 1.58 mm (0.062 in.), respectively, and the volume fraction of fibers is 0.33. Assume that (1) the fiber-matrix bond strength is 100 MPa (14,500 psi), (2) the fracture strength of the fibers is 3500 MPa (5 x 105 psi), and (3) the matrix stress at composite failure is...
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