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ENGG103 (DB225) Materials in Design
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Use the graphs provided in the handout to answer the following question to the nearest 2 decimal place.
For full marks show all calculation handwritten work in your answer booklet. Select the most correct answer
Handout: Figure 2 (a)&(b)
Given data:
Material: Duralumin
Original length: 104 mm
Cross section dimensions: width =3.2mm , depth= 2mm
- What is the final length of the sample if loaded to F= 1350 N
Use the graphs provided in the handout to answer the following question. (Select the option that is closest to your answer).
For full marks show all calculation handwritten work in your answer booklet.
Handout: Figure 4
Given data:
Material: 1045 Steel
Ultimate tensile strength = 625 MPa
Stress range for rotating part: Min stress = -150 MPa, Max stress = 400 MPa
Rotation: 6 Hz ( 1 Hz = 1 cycle per second)
How many hours would the part be expected to
survive before failing due to fatigue
?
Use the graphs provided in the handout to answer the following question. (Select the option that is closest to your answer).
For full marks show all calculation handwritten work in your answer booklet.
Handout: Figure 4
Given data:
Material: 1045 Steel
Ultimate tensile strength = 625 MPa
Stress range for rotating part: Min stress = -120 MPa, Max stress = 460 MPa
Rotation: 4 Hz ( 1 Hz = 1 cycle per second)
How many hours would the part be expected to
survive before failing due to fatigue
?