8 September 1993 Structural integrity of composite laminates with interlaced piezoceramic actuators
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Abstract
A three-dimensional finite element model is developed to analyze the interlaminar stress state surrounding an interlaced, active piezoceramic embedded within a unidirectional graphite/epoxy composite laminate. Interlacing increases the strength of composite structures with embedded actuators by redistributing the load around the piezoceramic and softening the material discontinuity between the piezoceramic and the composite structure. The analysis shows that interlacing results in as much as a 34.6% reduction in the magnitude of the maximum interlaminar tensile normal stress and a 25.2% reduction in the magnitude of the maximum interlaminar shear stress in the laminate. Moreover, the critical location of delamination initiation is removed from the interface between the piezoceramic and the composite material to a location away from the embedded actuator, thus maintaining the authority of the actuator after the onset of delamination.
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David A. Singh, David A. Singh, Anthony J. Vizzini, Anthony J. Vizzini, } "Structural integrity of composite laminates with interlaced piezoceramic actuators", Proc. SPIE 1917, Smart Structures and Materials 1993: Smart Structures and Intelligent Systems, (8 September 1993); doi: 10.1117/12.152783; https://doi.org/10.1117/12.152783
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