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sci.charpy-impact-energy Calculator
Calculates Charpy impact energy absorbed by a notched specimen and determines the ductile-to-brittle transition temperature (DBTT) from test data. Steel undergoes DBTT at temperatures ranging from −100 °C to +50 °C depending on composition — the Titanic's plates failed brittlely in −2 °C seawater.
Inputs
Striker Mass Kg
Total mass (kg). Distinct from weight — weight = mass × gravity. Mass is constant; weight varies with location.
Initial Angle Deg
Reference formula or conversion factor shown for context.
Final Angle Deg
Reference formula or conversion factor shown for context.
Pendulum Length M
Linear measurement. Ensure consistent units: 1 m = 1,000 mm = 3.281 ft.
Results
impact energy absorbed (J)
Sample size or count used in the calculation.
initial potential energy (J)
Energy stored by position in a gravitational field: PE = mgh. Converts to kinetic energy as an object falls. At the top of a drop, energy is all potential; at the bottom, all kinetic (ignoring losses).