Analytical and experimental studies of crushing behavior in composite laminates

Journal Article · Wed Nov 01 04:00:00 EST 1995 · Journal of Composite Materials

DOI:https://doi.org/10.1177/002199839502900806· OSTI ID:117662

Bolukbasi, A O; Laananen, D H ^[1]

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1. McDonnell Douglas Helicopter Systems, Mesa, AZ (United States)

The objective of this research effort has been to gain a better understanding of energy absorption behavior in composite laminates. Crush tests of nine flat plate specimens with three different lay-ups of T650-35/F584 graphite/epoxy fabric were performed to evaluate the mechanisms that contribute to the energy absorption process. A nonlinear finite element approach was used to model the sustained crushing of the flat plate, and a progressive failure model was implemented as part of the finite element analysis to enable modeling of the fundamental mechanisms involved in the crushing behavior. The progressive failure model was based on linear elastic fracture mechanics for prediction of crack growth and a set of failure criteria for predicting fiber/matrix failures that occurred as a result of large deformations. Friction between the specimen and the crushing surface was included in the model. Predicted values of sustained crushing stress agreed with experimental results for the flat plate specimens within nine percent. 22 refs.

• Sponsoring Organization: USDOE
• OSTI ID: 117662
• Journal Information: Journal of Composite Materials, Journal Name: Journal of Composite Materials Journal Issue: 8 Vol. 29; ISSN JCOMBI; ISSN 0021-9983
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
99 GENERAL AND MISCELLANEOUS
COMPOSITE MATERIALS
CRACK PROPAGATION
DEFORMATION
FAILURES
FINITE ELEMENT METHOD
FRICTION
NONLINEAR PROBLEMS
NUMERICAL SOLUTION