首页|Failure behavior of single-/double-shear in composite honeycomb sandwich panels based on acoustic emission
Failure behavior of single-/double-shear in composite honeycomb sandwich panels based on acoustic emission
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NETL
NSTL
Elsevier
Composite honeycomb sandwich panels are extensively used for their high strength-to-weight ratio, yet their damage mechanisms under out-of-plane shear loading remain poorly understood. In this work, out-of-plane shearing static and fatigue tests were performed on three types of composite honeycomb sandwich panel specimens, two for single shear and one for double shear. Real-time acoustic emission (AE) monitoring was employed, and the AE signals were decomposed to extract detailed damage information. The ranges of the AE parameter values corresponding to core shear microcracking and crack propagation were deduced. Entropy was introduced as a new quantitative metric to reflect the damage progression within the cores, with its trajectory effectively depicting the evolution of core damage over increasing fatigue cycles. Andrews plots were used as a form of phase space reconstruction to visualize AE data related to damage in composite honeycomb sandwich panels, enabling clear differentiation between early-stage shear microcracking and later-stage crack propagation through distinct curve patterns. The integration of entropy and Andrews plots provides a new approach to understanding damage mechanisms in composite honeycomb sandwich panels under out-of-plane shear loading.
Composite honeycomb sandwich panelOut of plane shearFatigueAcoustic emissionDamage failure behavior
NETL
NSTL
Elsevier
