Investigation of Core Node Separation and Crush
The causes of the honeycomb core node separation/core crush defects of fiberglass sandwich panel is analyzed. The porosity of skin and leakage of vacuum bag under high-pressure curing environment are identified as root causes based on the analysis of historical data and designed simulation testes, and approved by statistic analysis calculation also. The relationship of core thickness and the opportunity of the defects appearing are discovered by tests.
Xie Yi and Li Mi
F. Yu et al., "Investigation of Core Node Separation and Crush", Advanced Materials Research, Vols. 129-131, pp. 164-168, 2010