ASTM F394 covers the determination of the biaxial flexure strength (modulus of rupture) of thin ceramic substrates and is applicable to pecimens in the as-fired condition or to test pieces prepared to have a certain thickness or surface finish. The test specimen, a thin circular disk, rests on three symmetrically spaced points near its periphery. It is bent in a cupping fashion by the application of force to the center of the disk through a cylindrical ram. The force is applied to the ram at a prescribed constant rate in a compression test machine until the specimen breaks. The breaking load, the dimensions and elastic constants of the specimen, and the radii of the support and load are used to compute the maximum tensile stress which is at the center of the tension (convex) surface.
By means of our testing expertise and modular product design, we will help find the solution that is right for you. Give our test engineers a call today for help configuring the best test machine and accessories according to ASTM F394.
Recommended Test Machine
Forces up to 10 kN (2,250 lbf)
Low force tabletop systems
Modular series of five frame options with adjustable test space
Affordable testing option for tension, compression, bend, peel and much more
Forces up to 5 kN (1,125 lbf)
Low force tabletop systems
Tests at speeds up to 2,500 mm/min (100 in/min)
Best for high travel or high elongation test requirements
Force range of 5 kN to 600 kN (1,125 lbf to 135,000 lbf)
Adjustable test space
The most popular choice for static tension and compression tests
These dual column testers are available in both tabletop and floor standing models
Recommended Testing Accessories
Designed in accordance to ASTM F394
Allows for biaxial flexure testing of flat disks
Specimen supported by three ball bearings on a 25.4 mm (1 in) diameter circle
