Static and dynamic large deflection flexural response of graphite-epoxy beams

摘要

An experimental and analytical study of large deflection flexural response of graphite-epoxy beams subjected to eccentric axial compression was conducted. The beam specimens were subjected to axial impact and to static axial loads, in order to assess the damage caused by impact. A one-dimensional geometrically and materially nonlinear finite element model was developed to predict static beam response. The model incorporated width-wise effects by assuming specific forms of the displacements across the width, with lengthwise variation introduced as a degree of freedom. The resulting 22 degree of freedom element accurately predicted the load deflection and strain-deflection responses of the static test specimens.