Homework Answers
A. First we consider steel and mild steel. Mild steel has less
carbon as compared to steel, hence steel is less malleable and
harder than mild steel, also mild steel is less brittle than steel.
Steel is show higher yield strength and ultimate strength as
compared to mild steel, but will show near the same young modulus.
As the % of carbon increases the strain developed keeps on
decreasing. Now, if we consider aluminium in the picture, it's
highly ductile and yield point phenomenon is almost not seen in it.
It shows proof stress at 0.2% also. Plastic deformation is not seen
in aluminium.
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5. a) Explain the differences in the tensile behaviour of steel, aluminium and mild steel. b) Dra...
1.Below are stress-strain curves for 5 steels. (a) annealed low carbon steel, (b) a steel alloy...
1.Below are stress-strain curves for 5 steels. (a) annealed low carbon steel, (b) a steel alloy which has a DBTT of +50°C (c) 304 stainless steel (d) nearly pure coarse grained Fe Identify the modulus, yield stress, tensile strength, ductility, and toughness. Identify the amount of elastic strain at yield stress, tensile strength, point right before fracture, point right after fracture. 2000 -Low C steel, 1800 steel alloy, DBTT +50C 304 stainless pure Fe 1600 1400 1200 t 1000 800...
Mechanics of Materials Problem 4. (20 points) σ(ksi) material A 100 material B 90 60 material...
Mechanics of Materials Problem
4. (20 points) σ(ksi) material A 100 material B 90 60 material C 40 01 .015 .02 05 06 what is the value of the modulus of elasticity for material B? What is the value of the yield stress for material A? What is the value of the ultimate tensile strength for material C? What is the value of the fracture strength of material A? Calculate the strain energy density required to yield material B: ....
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...
1. A large plate is fabricated from a steel alloy that has a plane strain fracture toughness of 8...
1. A large plate is fabricated from a steel alloy that has a plane strain fracture toughness of 82.4 MPavm. If the plate is exposed to a tensile stress of 345 MPa during service use, determine the minimum length of a surface crack that will lead to fracture. Assume a value of 1.0 for Y. Maximum stress at tip of elliptically shaped crack Pt 2Ery, 1/2 critical stress required for crack propagation in a brittle material πα KIe YoeVra Fracture...
Please I need help strength of materials tensile strngth of steel report please answer all these...
Please I need help strength of materials tensile strngth of
steel report please answer all these questions..thank you .
Answer the Following Questions: 7) Discuss the differences in the shapes of the stress-strain curves for the different types of materials tested (Not required) 8) Define the four fundamental mechanical properties: a) Yield strength b) Young's Modulus cUltimate strength d) Ductility 9) Discuss the importance to ensure axial alignment of the test specimen 10) Why stress and strain are more significant...
Identify the material. that fits the stress-strain curve. A) MILD STEEL Yield Strength: 30 kN, Ultimate...
Identify the material. that fits the stress-strain
curve.
A)
MILD STEEL
Yield Strength: 30 kN, Ultimate Strength: 40 kN, Young Modulus:
30/0.7 kN/mm = 43 kN/mm
B)
ALUMINUM
Yield Strength: 20 kN, Ultimate Strength: 26 kN, Young Modulus:
20 kN/mm
C)
CAST IRON
Yield Strength: N/A, Ultimate Strength: 20 kN, Young Modulus:
20/0.4 kN/mm = 50 kN/mm
D)
COPPER
Yield Strength: 30 kN, Ultimate Strength: 35 kN, Young Modulus:
30 kN/mm
Instructions CLI Tesile TesTeR Test Specimens Material - Mild...
1. (5 pts) If a steel bar subjected to uniaxial tension enters into t the plasticity...
1. (5 pts) If a steel bar subjected to uniaxial tension enters into t the plasticity region of the stress-strain curve, which of the following statement is ALWAYS true? (select all that apply) a. Stress in the bar has exceeded yielding strength: b. Stress in the bar has exceeded proportional limit; c. The total strain can d. The plastic strain can be fully recovered if tensile load is fully released; be fully recovered if tensile load is fully rel released;...
Engineering materials b) A mild steel rod of 4 cm diameter was tested for tensile strength...
Engineering materials
b) A mild steel rod of 4 cm diameter was tested for tensile strength with the gauge length of 60 mm. The following observations were recorded: Final length = 9 cm; Final diameter = 8 mm; Yield load – 5.4 kN and Ultimate load – 8.1 KN. (4 Marks) Calculate 1. Yield stress (1 Mark) 2. Ultimate tensile stress (Mark) 3. Percentage reduction in area. (1 Mark) 4. Percentage elongation (IMark)
1. Stress-Strain Diagrams (10 points) Draw and label a Stress-Strain diagram for two materials with the...
1. Stress-Strain Diagrams (10 points) Draw and label a Stress-Strain diagram for two materials with the following properties. (B) is brittle and has a Young's Modulus that is twice as large as (A). The elastic limit, yield point and rupture occur almost simultaneously for (B). (A) is a ductile material that undergoes plastic deformation prior to rupture. The toughness of (A) is approximately 4x as large as (B). You do not need to label any points on the curves other...
Problem 2. A specimen of medium-carbon steel having an initial diameter ofd, = 0.503 in was...
Problem 2. A specimen of medium-carbon steel having an initial diameter ofd, = 0.503 in was tested in tension using a gauge length,-2.0 in . The following data were obtained Elastic region Load (Ibf) 1000 2000 3000 4000 7000 8400 Plastic region Elongation (in) Load (bf 0.0004 0.0006 0.0010 0.0013 0.0023 0.0028 8800 9200 9100 13200 15200 17000 16400 14800 Area (in 0.1984 0.1978 0.1963 0.1924 0.1875 0.1563 0.1307 0.1077 (Use excel or MATLAB to compute stresses and strains, and...
1.Below are stress-strain curves for 5 steels. (a) annealed low carbon steel, (b) a steel alloy which has a DBTT of +50°C (c) 304 stainless steel (d) nearly pure coarse grained Fe Identify the modulus, yield stress, tensile strength, ductility, and toughness. Identify the amount of elastic strain at yield stress, tensile strength, point right before fracture, point right after fracture. 2000 -Low C steel, 1800 steel alloy, DBTT +50C 304 stainless pure Fe 1600 1400 1200 t 1000 800...
Mechanics of Materials Problem
4. (20 points) σ(ksi) material A 100 material B 90 60 material C 40 01 .015 .02 05 06 what is the value of the modulus of elasticity for material B? What is the value of the yield stress for material A? What is the value of the ultimate tensile strength for material C? What is the value of the fracture strength of material A? Calculate the strain energy density required to yield material B: ....
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...
1. A large plate is fabricated from a steel alloy that has a plane strain fracture toughness of 82.4 MPavm. If the plate is exposed to a tensile stress of 345 MPa during service use, determine the minimum length of a surface crack that will lead to fracture. Assume a value of 1.0 for Y. Maximum stress at tip of elliptically shaped crack Pt 2Ery, 1/2 critical stress required for crack propagation in a brittle material πα KIe YoeVra Fracture...
Please I need help strength of materials tensile strngth of
steel report please answer all these questions..thank you .
Answer the Following Questions: 7) Discuss the differences in the shapes of the stress-strain curves for the different types of materials tested (Not required) 8) Define the four fundamental mechanical properties: a) Yield strength b) Young's Modulus cUltimate strength d) Ductility 9) Discuss the importance to ensure axial alignment of the test specimen 10) Why stress and strain are more significant...
Identify the material. that fits the stress-strain
curve.
A)
MILD STEEL
Yield Strength: 30 kN, Ultimate Strength: 40 kN, Young Modulus:
30/0.7 kN/mm = 43 kN/mm
B)
ALUMINUM
Yield Strength: 20 kN, Ultimate Strength: 26 kN, Young Modulus:
20 kN/mm
C)
CAST IRON
Yield Strength: N/A, Ultimate Strength: 20 kN, Young Modulus:
20/0.4 kN/mm = 50 kN/mm
D)
COPPER
Yield Strength: 30 kN, Ultimate Strength: 35 kN, Young Modulus:
30 kN/mm
Instructions CLI Tesile TesTeR Test Specimens Material - Mild...
1. (5 pts) If a steel bar subjected to uniaxial tension enters into t the plasticity region of the stress-strain curve, which of the following statement is ALWAYS true? (select all that apply) a. Stress in the bar has exceeded yielding strength: b. Stress in the bar has exceeded proportional limit; c. The total strain can d. The plastic strain can be fully recovered if tensile load is fully released; be fully recovered if tensile load is fully rel released;...
Engineering materials
b) A mild steel rod of 4 cm diameter was tested for tensile strength with the gauge length of 60 mm. The following observations were recorded: Final length = 9 cm; Final diameter = 8 mm; Yield load – 5.4 kN and Ultimate load – 8.1 KN. (4 Marks) Calculate 1. Yield stress (1 Mark) 2. Ultimate tensile stress (Mark) 3. Percentage reduction in area. (1 Mark) 4. Percentage elongation (IMark)
1. Stress-Strain Diagrams (10 points) Draw and label a Stress-Strain diagram for two materials with the following properties. (B) is brittle and has a Young's Modulus that is twice as large as (A). The elastic limit, yield point and rupture occur almost simultaneously for (B). (A) is a ductile material that undergoes plastic deformation prior to rupture. The toughness of (A) is approximately 4x as large as (B). You do not need to label any points on the curves other...
Problem 2. A specimen of medium-carbon steel having an initial diameter ofd, = 0.503 in was tested in tension using a gauge length,-2.0 in . The following data were obtained Elastic region Load (Ibf) 1000 2000 3000 4000 7000 8400 Plastic region Elongation (in) Load (bf 0.0004 0.0006 0.0010 0.0013 0.0023 0.0028 8800 9200 9100 13200 15200 17000 16400 14800 Area (in 0.1984 0.1978 0.1963 0.1924 0.1875 0.1563 0.1307 0.1077 (Use excel or MATLAB to compute stresses and strains, and...
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