Charpy Impact Test Calculator

Formula

The formula to calculate the Energy Absorbed (E) is:

\[ \text{E} = (\text{m} \times \text{g} \times \text{h}) - (\text{m} \times \text{g} \times \text{d}) \]

Where:

E – The energy absorbed by the material (Joules).
m – The mass of the pendulum hammer (kg).
g – The acceleration due to gravity (9.81 m/s²).
h – The initial height of the pendulum hammer (m).
d – The distance the pendulum hammer travels after impact (m).

Definition

Energy Absorbed (E): The amount of energy absorbed by the material during the impact, measured in Joules.
Mass of Pendulum Hammer (m): The mass of the pendulum hammer used in the test, measured in kilograms.
Initial Height of Pendulum Hammer (h): The height from which the pendulum hammer is released, measured in meters.
Distance Traveled After Impact (d): The distance the pendulum hammer travels after impacting the specimen, measured in meters.

Example

Let's say the mass of the pendulum hammer (m) is 10 kg, the initial height (h) is 2 meters, and the distance traveled after impact (d) is 0.5 meters. Using the formula:

\[ \text{E} = (10 \times 9.81 \times 2) - (10 \times 9.81 \times 0.5) = 196.2 - 49.05 = 147.15 \text{ Joules} \]

So, the energy absorbed is 147.15 Joules.