The principle of the method specified is cyclically stressing the specimen in a way that may be regarded as the superposition of an alternating stress on a static stress which is the mean stress. The number of cycles at failure of the specimen for a given mean stress and stress amplitude is determined. These values are used to establish SN curves which then permit the estimation of the confidence zone concerning the fatigue resistance of a joint. The fatigue properties are a function of the specimen geometry. The results do not correspond to intrinsic properties of the adhesive and cannot be used for design purposes.
Registration number (WIID)
8858
Scope
The principle of the method specified is cyclically stressing the specimen in a way that may be regarded as the superposition of an alternating stress on a static stress which is the mean stress. The number of cycles at failure of the specimen for a given mean stress and stress amplitude is determined. These values are used to establish SN curves which then permit the estimation of the confidence zone concerning the fatigue resistance of a joint. The fatigue properties are a function of the specimen geometry. The results do not correspond to intrinsic properties of the adhesive and cannot be used for design purposes.
