Selection and Measurement of the ‘Bearing Fatigue Damage Parameter’ in CFRP Laminate Bolted Joints

Abstract

The cumulative damage (CD) problem can be resolved in terms of a damage parameter which must obey certain conditions. Such a damage parameter can be used with residual strength as well as residual stiffness theory. This paper debates the ‘bearing fatigue damage’ in CFRP laminates around loaded holes according to the above two theories. It describes damage initiation and propagation by the bearing strength of loaded holes as well as perpetuity deformation of circular holes. This paper gives a selection of the measurement methods of the bearing fatigue damage parameter, a new concept of the fatigue damage point, and lists experimental data.