Coupled Multi-disciplinary Methods For
Structural Reliability And Affordability
Author(s)
C. C. Chamis
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, results of the non-deterministic optimization are
presented with probabilistic lower bounds of 0.001 and upper bounds of 0.999.
Keywords: applications-aerospace, composite components, thermal analysis,
structural analysis, probability, ceramic composites.
1 Introduction
Recent research activities have focused on developing multi-scale, multi-level,
multi-disciplinary analysis and optimization methods. Multi-scale refers to
formal methods which describe complex material behavior; multi-level refers to
integration of participating disciplines to describe a structural response at the
scale of interest; multi-disciplinary refers to open-ended for various existing and
yet to be developed disciplines. For example, these include but are not limited to:
multi-factor models for material behavior, multi-scale composite mechanics,
general purpose structural analysis, progressive structural fracture for evaluating
durability and integrity, noise and acoustic fatigue, emission requirements, hot
fluid mechanics, heat-transfer and probabilistic simulations. Many of these, as
well as others, are encompassed in an integrated computer code identified as
Engine Structures Technology Benefits Estimator (EST/BEST) [1]. The
Keywords
applications-aerospace, composite components, thermal analysis,
structural analysis, probability, ceramic composites.
Related Book
Other papers in this volume
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