Charpy impact energy normalization calculator

Calculate net ligament area and area-normalized impact energy with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use net ligament area and area-normalized impact energy to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Absorbed impact energy (J)
80
Net ligament width (mm)
10
Net ligament depth (mm)
8
Net ligament area (mm²)
80
Area-normalized impact energy (kJ/m²)
1000

Try another scenario

Absorbed impact energy (J)
81
Net ligament width (mm)
10
Net ligament depth (mm)
8
Net ligament area (mm²)
80
Area-normalized impact energy (kJ/m²)
1,012.5
Calculation method

Calculation method

Net ligament area (mm²)

Divide absorbed energy by supplied net ligament area; conversion 1 J/mm² =1000 kJ/m².

Area-normalized impact energy (kJ/m²)

Divide absorbed energy by supplied net ligament area; conversion 1 J/mm² =1000 kJ/m².

Symbols and units
a
Absorbed impact energy (J)
b
Net ligament width (mm)
c
Net ligament depth (mm)

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • User-supplied measurements and assumptions; Divide absorbed energy by supplied net ligament area; conversion 1 J/mm² =1000 kJ/m². Supported limits: Finite numeric values bounded to 1e9 magnitude; lists and tables contain 1–100 records unless a stricter bound is stated. Inputs use the units shown. Lists explicitly paired by a method must have matching lengths; independent polynomial coefficient vectors may differ. Respect stated physical, interpolation, policy and computational domain limits.
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