EGB121 Prac 1 Worksheet PDF

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Download EGB121 Prac 1 Worksheet PDF

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Laboratory 1 – Materials Properties Experiment Worksheet You may work in a group of up to 5 people during the prac. Only ONE worksheet per group will need to be submitted. This worksheet should have the name, student number and signature of each member. You will NOT receive any marks if your name isn’t on the worksheet. You should work collaboratively to analyse and discuss the data and provide answers to the questions below. Once completed, the worksheet will need to be handed to your demonstrator for marking and will be returned to you at the end of the prac. To count your mark in the grade center on Blackboard, EACH member MUST upload the worksheet into the Prac 1 link in the assessment tab on Blackboard. Please upload into the session you attended. You will NOT receive any marks if you fail to upload the worksheet by the due date. Full Name

Student Number

Mark (for tutor only)

Date of Lab

Tutor’s Signature

Specimen

Signature

Experimental Results 1. Tabulate the measured dimensions of the tensile specimens below. The gauge length of all the specimen is 80 mm. Specimen

Width (mm)

Thickness (mm)

Cross-sectional area (mm2)

Aluminium 5052 Aluminium 5005 Stainless Steel 304 Mild Steel 2. Your demonstrator will assign your group to analyse ONE of the specimens above. Tabulate some representative load and extension data obtained from the test and calculate the corresponding stress and strain (2 marks). Elastic Region Load (N) Extension (mm) Stress (MPa) Strain (%)

Yeild

Extra Points

UTS

Fracture

Stress (MPa)

3. Use the calculated data in (2) to sketch the stress-strain curve (2 marks).

Strain (%) 4. From the sketch determine the following material properties (2 marks): Property

Symbol

Your Value

Unit

Young's Modulus

GPa

0.2% Proof stress

MPa

Ultimate Tensile Stress Engineering strain at the point of necking

MPa

Ductility

%

%

5. Describe the advantages and limitations of using the stress-strain curve to determine the elastic modulus of the material. Why is your measurement different from the published value in the literature (see pre-lab value)? (2 marks)

6. Draw the free body diagram of your tensile specimen during the experiment (2 marks)...