creep test lab report

LS-22045

CREEP TEST DEMONSTRATOR

EXPERIMENTS

1

LS-22045

CREEP TEST DEMONSTRATOR

EXPERIMENTS

F
G
A
H

B

I
C
J

D
E

LEGEND

A

-

Temperature controller & display

B

-

Timer

C

-

Timer switch

D

-

Main power switch

E

-

Heater switch

F

-

Dial gauge

G

-

Beam

H

-

Weight hanger

I

-

Support screw

J

-

Test area

2

LS-22045

CREEP TEST DEMONSTRATOR

EXPERIMENTS
OBJECTIVES
To determine the effects of temperature and load on creep strain for four different materials: Polyethylene, Polypropylene, Polyvinylchloride and Lead.
PROCEDURE
1. Mount the specimen inside the test area by using the mounting screws.
2. Support the beam by raising the support screw (I) until it slightly lifts the beam (G).
3. Close the doors of the test area and switch on the main power (D).
4. Adjust the temperature to a desired value by using the temperature controller (A).
5. Switch on the heater (E).
6. Wait for the temperature inside the test area to achieve steady-state.
7. Then, lower the support screw until it no longer supports the beam.
8. Adjust the dial gauge (F) so that it gives a zero reading.
9. Attach the weight hanger (H) and desired amount of weights at the end of the beam.
10. Set the timer (B) to one minute, and switch on the timer (C).
11. Once one minute has elapsed (the alarm should trigger), record the dial gauge reading.
12. Repeat steps 10 and 11 for additional readings.
13. Once the experiment is over, switch off heater, timer and main power.
14. Tabulate the results, and plot the graph of strain vs. time.
SAFETY PRECAUTIONS
1. Always wear gloves when attempting to retrieve a hot specimen to avoid injury. If possible, allow the specimen to cool down for at least 10 minutes before removing it from the oven.
2. Do not set the temperature to exceed 80°C, as this may cause damage to electrical components and sensors in the unit.