Accession Number:

ADA357778

Title:

Enhanced Reliability Prediction Methodology for Impact Damaged Composite Structures

Descriptive Note:

Final rept.

Corporate Author:

NORTHROP GRUMMAN CORP EL SEGUNDO CA MILITARY AIRCRAFT SYSTEMS DIV

Personal Author(s):

Report Date:

1998-10-01

Pagination or Media Count:

90.0

Abstract:

A through review of the existing impact test data and analysis methods was conducted and the results were used to identify a reliability prediction methodology for further development. The integrated residual strengthreliability method developed by Northrop Grumman under a NavyFederal Aviation Administration sponsored program was selected and modified. The modification was primarily in reducing the number of empirical constants required in the model. In addition, a cutoff energy level and a threshold energy level were also established analytically for the strength prediction. A structural damage tolerance evaluation was conducted using the modified model and the results compared to those obtained from the existing model.

Subject Categories:

  • Laminates and Composite Materials
  • Mechanics
  • Aircraft

Distribution Statement:

APPROVED FOR PUBLIC RELEASE