R-curve Calculator

Fracture toughness as crack extends, vital for structural analysis.The formula is given by:

Where:

• KIc​(a) is the fracture toughness at a given crack length $a$,
• KIc​(0) is the initial fracture toughness (typically at $a=0$),
• $R(a)$ is the increment in fracture toughness as the crack grows.