Coupled Multi-Disciplinary Optimization for Structural Reliability and Affordability

Abstract

A computational simulation method is presented for Non-Deterministic Multidisciplinary Optimization of engine composite materials and structures. A hypothetical engine duct made with ceramic matrix composites (CMC) is evaluated probabilistically in the presence of combined thermo-mechanical loading. The structure is tailored by quantifying the uncertainties in all relevant design variables such as fabrication, material, and loading parameters. The probabilistic sensitivities are used to select critical design variables for optimization. In this paper, two approaches for non-deterministic optimization are presented. The non-deterministic minimization of combined failure stress criterion is carried out by: (1) performing probabilistic evaluation first and then optimization and (2) performing optimization first and then probabilistic evaluation.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Feb 01, 2003
Accession Number
ADP014122

Entities

People

  • Christos C. Chamis
  • Galib H. Abumeri

Organizations

  • National Aeronautics and Space Administration

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Ceramic Matrix Composites
  • Coefficients
  • Composite Material Fabrication
  • Composite Materials
  • Composite Structures
  • Fabrication
  • Fluid Mechanics
  • Heat Transfer
  • Internal Pressure
  • Materials
  • Mechanical Properties
  • Mechanics
  • Optimization
  • Simulations
  • Thermal Analysis
  • Thermal Conductivity
  • Thermal Expansion

Readers

  • Operations Research
  • Reinforced Composite Materials
  • Statistical inference.