A model for predicting damage induced fatigue life of laminated composite structural componentsThis paper presents a model for predicting the life of laminated composite structural components subjected to fatigue induced microstructural damage. The model uses the concept of continuum damage mechanics, wherein the effects of microcracks are incorporated into a damage dependent lamination theory instead of treating each crack as an internal boundary. Internal variables are formulated to account for the effects of both matrix cracks and internal delaminations. Evolution laws for determining the damage variables as functions of ply stresses are proposed, and comparisons of predicted damage evolution are made to experiment. In addition, predicted stiffness losses, as well as ply stresses are shown as functions of damage state for a variety of stacking sequences.
Document ID
19910039754
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Allen, David H. (Texas A&M Univ. College Station, TX, United States)
Lo, David C. (Texas A&M Univ. College Station, TX, United States)
Georgiou, Ioannis T. (Texas A & M University College Station, United States)
Harris, Charles E. (NASA Langley Research Center Hampton, VA, United States)