Failure Characteristics of Sandwich Plates Under Static and Dynamic Loading

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.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1997
Accession Number
ADA338022

Entities

People

  • Anthony N. Palazotto
  • L. N. Grummadi

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Composite Materials
  • Computational Fluid Dynamics
  • Computational Science
  • Computer Programs
  • Dynamic Tests
  • Elastic Properties
  • Failure Mode And Effect Analysis
  • Finite Element Analysis
  • Geometry
  • Laminates
  • Material Degradation Processes
  • Materials
  • Materials Science
  • Mechanics
  • Modulus Of Elasticity
  • Test And Evaluation
  • Three Dimensional

Fields of Study

  • Engineering
  • Physics

Readers

  • Structural Health Monitoring of Composite Structures.

Technology Areas

  • Space