Title page for ETD etd-08252008-161903

Type of Document Dissertation
Author Adams, Daniel O'Hare
URN etd-08252008-161903
Title Effects of layer waviness on compression-loaded thermoplastic composite laminates
Degree PhD
Department Engineering Mechanics
Advisory Committee
Advisor Name Title
Hyer, Michael W. Committee Chair
Gürdal, Zafer Committee Member
Johnson, Eric R. Committee Member
Loos, Alfred C. Committee Member
Reifsnider, Kenneth L. Committee Member
  • Materials
Date of Defense 1991-12-10
Availability restricted

The effects of layer waviness on the compression response of T3001P1700 carbon/polysulfone composite laminates were investigated both experimentally and analytically. A three-step procedure was used to fabricate isolated layer waves into the central 0° layer of [902,/02/902/02/902/02w]S laminates. The influence of various layer wave geometries on the static compression strength and compression fatigue life were determined experimentally. Moire interferometry was used to investigate the disturbance in the displacement fields and the modes of deformation associated with layer waviness under compression loading. The state of stress in the vicinity of the layer waves and the influence of the layer waves on static compression strength were predicted using a planestrain finite element analysis which included material nonlinearity.

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