Artigo De: orcid, scopus, cienciavitae
Integrated assessment procedure for determining the fracture strength of glass components in CSP systems
Frattura ed Integrità Strutturale
— 2014 — Italian Group of Fracture
Informações chave
Autores:
Publicado em
1 de outubro de 2014
Resumo
The structural integrity and reliability of glass components are key issues for concentrated solar power (CSP) systems. For example, the glass windows in a solar furnace may suffer catastrophic fracture due to thermal and structural loadings, including reaction chamber pressure cycling. Predicting design strength provides the basis for which the optical components and mounting assembly can be designed so that failure does not occur over the operational lifetime of a given CSP system. The fracture strength of brittle materials is dependent on the size and distribution of cracks or surface flaws. Due to the inherent brittleness of glass resulting in catastrophic failure, conservative design approaches are currently used for the development of optical components made of glass, which generally neglect the specific glass composition as well as subcritical crack growth, surface area under stress, and nature of the load – either static or cyclic – phenomena. In this paper, several methods to characterize the strength of glass are discussed to aid engineers in predicting a design strength for a given surface finish, glass type, and environment. Based on the Weibull statistical approach and experimental data available on testing silica glass rod specimens, a theoretical model is developed for estimating their fracture strength under typical loading conditions. Then, an integrated assessment procedure for structural glass elements is further developed based on fracture mechanics and the theory of probability, which is based on the probabilistic modelling of the complex behaviour of glass fracture but avoids the complexity for calculation in applications. As an example, the design strength of a glass window suitable for a solar furnace reaction chamber is highlighted.
Detalhes da publicação
Autores da comunidade :
Luís Manuel Guerra da Silva Rosa
ist11630
Bin Li
ist30681
Versão da publicação
AO - Versão original do autor
Editora
Italian Group of Fracture
Título do contentor da publicação
Frattura ed Integrità Strutturale
Primeira página ou número de artigo
438
Última página
445
Volume
30
Fascículo
30
Domínio Científico (FOS)
materials-engineering - Engenharia dos Materiais
Idioma da publicação (código ISO)
eng - Inglês
Identificador alternativo (URI)
http://www.scopus.com/inward/record.url?eid=2-s2.0-84908012975&partnerID=MN8TOARS
Acesso à publicação:
Acesso apenas a metadados
Entidade financiadora da bolsa/projeto
Seventh Framework Programme
Identificador da Entidade Financiadora: 609837