MATS2004 Assignment (JZ) [100 Marks total]

The assignment is due on the 18^th of August before midnight. Late submission will be deducted 10% per day to a maximum of 50%, after which no more submissions will be accepted.

Note: All assignments are automatically checked by plagiarism software for originality both within the cohort of submitted assignments and against a database of known material. Any assignment found to be plagiarised will be given zero and the student referred to the Deputy Head of School for an investigation of academic misconduct.

Question 1: Creep

2. An engineering component made of the material whose data is plotted as an LMP below is expected to last up to 150,000 hours at an applied stress of 100 MPa. [15 Marks]

   • Calculate the temperature at which this component must operate below to satisfy these requirements?

Question 2: Fracture

3. In one sentence, why is this important? [5 Marks]

Question 3: Fatigue lifetime.

A controlled fatigue test was carried out on a specimen of aircraft grade Aluminium alloy. The resulting Stage 2 fatigue crack growth data is displayed in the figure below. The alloy has a fracture toughness of 28 MPa√m.

2. In less than 100 words, summarise if you think it would be reasonable to use this component up to the number of cycles you’ve calculated? (if you don’t have an answer from (a) assume its 1000 cycles to catastrophic failure) [10 Marks]