Accession Number : ADA338022

Title :   Failure Characteristics of Sandwich Plates Under Static and Dynamic Loading

Descriptive Note : Technical rept.

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSONAFB OH SCHOOL OF ENGINEERING

Personal Author(s) : Palazotto, A. N. ; Grummadi, L. N.

PDF Url : ADA338022

Report Date : OCT 1997

Pagination or Media Count : 254

Abstract : Laminated sandwich plate constructions are extensively used in various aerospace and industrial applications. However, these plates are prone to many defects. Specifically, their resistance to impact is a major concern. Impact can significantly reduce the strength and stiffness of the structure. Studying various aspects that can be used to improve the impact resistance of sandwich plates is the objective of this report. Two different sandwich models are studied. First, the sandwich plate is made of conventional honeycomb construction while the second plate is made of Z-pins. Experiments are conducted and based on the experimental observations, a phenomenological analytical approach is developed. Issues studied include the determination of impact induced damage initiation, types of damage modes, propagation of damage modes, and the effect of damage on the overall performance of the sandwich plates.

Descriptors :   *SANDWICH CONSTRUCTION, *HONEYCOMB STRUCTURES, MODELS, IMPACT STRENGTH, CONSTRUCTION, PLATES, FAILURE(MECHANICS).

Subject Categories : Structural Engineering and Building Technology

Distribution Statement : APPROVED FOR PUBLIC RELEASE