Device and method for the mechanical testing of fatigue crack growth of road materials

摘要

The mechanical test apparatus comprises a frame (1) including a base (2) fitted with housings (9, 10) intended to receive a test-piece (11) of elongate general shape, and a beam (6) which carries means (13 to 15) for stressing the test-piece (11), the stressing means (13 to 15) including a spindle (15) intended to transmit stressing forces to the test-piece (11), perpendicularly to the longitudinal axis of the test-piece (11). The spindle (15) may be fitted with a head (16) designed to convert the stressing forces into shear strains. In addition, the mechanical test apparatus comprises means for measuring the stressing forces as well as means for measuring the progression of a crack front. IMAGE