Response of composite panels subjected to near-field blast loading

Document Type

Conference Proceeding

Date of Original Version



Experimental studies were performed to understand the near-field blast response of composite panels when exposed to near-field explosive loading in different environments. The panel construction under consideration was an e-glass fiber-reinforced composite laminate infused with Derakane 8084 vinyl ester resin. The panel was layered bi-axially with woven fiber orientations of 0° and 90°. Panel dimensions were approximately 203 mm × 203 mm × 1 mm (8 in × 8 in × 0.04 in). Experiments were carried out with the panel fully clamped in a holding fixture, which was in turn fastened inside a water tank. The fixture was fastened in such a way as to allow for explosive loading experiments in the following environments: submerged with water backing, submerged with air backing, and air immersion with air backing. A stereo Digital Image Correlation [DIC] system was employed to capture the full-field dynamic behavior of the panel during the explosive event. Since light travels through water before entering the cameras, it distorts the coordinates of the speckle pattern on the specimen. In order to overcome this problem, calibration experiments were first performed to develop an algorithm to account for the refractive index difference between water and air. Results indicated that the immersion environment contributes significantly to the blast response of the material and to the specimens' appreciable damage characteristics.

Publication Title

ICCM International Conferences on Composite Materials



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