COMPRESSION TEST ON CAST IRON
Objective
To study the mechanical properties of cast iron specimen under compression.
Apparatus used:
Universal Testing Machine,Dial Indicators,Scale & Vernier calipers.
STEP
1
Measure the Diameter of the test sample using vernier caliper and calculate the Moment of Inertia.
| Initial Diameter in two perpendicular directions | Average initial diameter di (mm) | |
| dix(mm) | diy(mm) | |
| d1x= | d1y= | |
STEP
2
Measure the length of the specimen.
STEP 3
Sample is placed in the UTM.
STEP 4
Start the loading process, note down the deflections using dial gauge for corresponding load intervals.The shape of fracture for brittle material is studied.
STEP 5
Graph.
STEP 6
Observations and Calculations.
| Initial diameter in mm | |
|---|---|
| Length of the specimen between the grips in mm | |
| Original c/s area(A0)in mm2 | |
| Slope1 in kN/div | |
| Slope2 in kN/div | |
| Slope3 in kN/div | |
| Least Count(LC) in mm | 0.01 |
| Proof Stress(N/mm2) | |
|---|---|
| Compressive Strength(N/mm2) | |
| Secant Modulus(GPa) | |
| Tangent Modulus(GPa) | |
| Modulus of Elasticity(GPa) |
| Result | Actual Value | Entered Value | Percentage Error | Proof Stress(N/mm2) | Compressive Strength(N/mm2) | Secant Modulus(GPa) | Tangent Modulus(GPa) | Modulus of Elasticity(GPa) |
|---|
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