A computer simulation for estimating lower bound fracture strength of composites using Weibull distribution
COMPOSITES PART B-ENGINEERING, cilt.35, sa.3, ss.263-266, 2004 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 35 Sayı: 3
- Basım Tarihi: 2004
- Doi Numarası: 10.1016/j.compositesb.2003.11.002
- Dergi Adı: COMPOSITES PART B-ENGINEERING
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.263-266
- Anahtar Kelimeler: carbon fibre, mechanical properties, computational modelling, statistical properties/methods, mechanical testing, PARAMETERS
- İstanbul Üniversitesi-Cerrahpaşa Adresli: Hayır
Özet
Estimating confidence lower bound for fracture strength of composites is a key concern in design and manufacture, and the Weibull distribution has been widely used for this purpose. Previous simulation-based studies presented computational tools for these bounds involving tables or parametric equations, which lack generality and may contain simulation and curve-fitting errors. An alternative approach is to present a fast and effective simulation tool that can be directly used by the end-user. Such a tool is developed in this study for estimating the bounds using the Weibull distribution based on maximum likelihood estimation. This is a more versatile approach in that it allows the user to input any desired confidence level, failure probability, and simulation-run number. The tool is demonstrated by using fracture strength data obtained from ASTM D3039 tension tests of 19 identical carbon-epoxy composite specimens. The results are compared with those obtained from previously developed approaches. (C) 2004 Elsevier Ltd. All rights reserved.