FM-3541 Fracture Mechanics Gauge

For fracture toughness testing per ASTM E1820, E399, E647, etc.

FM-3541 is a fracture mechanics gauge used to determine parameters such as JIC, KIC, R-curve, fatigue crack growth rate (da/dN), and to comply with standards like E1820, E399, and E647. It is suitable for tests on various specimen types, including compact tension, arc-shaped, disk-shaped, and bend specimens, and meets the requirements for JIC and R-curve testing as per E1820.

Features:
— May be left on through specimen failure
— Fully enclosed gauges for protection from accidental damage
— Sharp grooves per ASTM E1820 and E399 for improved stability when mounted
— All standard configurations meet ASTM E1820, ISO 12135, and ISO 9513 Class 1 requirements for accuracy.
— Maximum operating frequency may be from 5 Hz to >200 Hz depending on COD gage and test apparatus configurations
— For da/dN testing or pre-cracking, where maximum frequency (>50 Hz) is required, minimum measuring ranges are recommended
— For KIC/JIC testing, maximum accuracy is achieved with the smallest measuring range and the largest gauge length that will perform the test.