Reliability Estimation of Optimal Viscoelastic Composite Shells in Critical-Time Calculations

Author: Teters G.

Source: Mechanics of Composite Materials, Volume 39, Number 6, November 2003 , pp. 553-558(6)

Publisher: Springer

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Abstract:

The problem of reliability estimation for optimal viscoelastic composite shells in critical-time calculations is considered. The weight minimization of a viscoelastic composite shell, with constraints on deflections at the critical time, leads to a system deforming unstably, whose deflections grow in time with an increasing rate. A method for estimating the reliability of such shells in calculating the critical time is discussed. This time is regarded as a random variable depending on many, roughly equivalent, factors. An analysis of the reliability is carried out for different values of coefficients of variation, occurring in practice.

Keywords: reliability; composite shells; viscoelasticity; critical time

Document Type: Research article

DOI: http://dx.doi.org/10.1023/B:MOCM.0000010627.44159.72

Affiliations: 1: Institute of Polymer Mechanics, University of Latvia, Riga, LV-1006, Latvia

Publication date: 2003-11-01