Cure strain in thick CFRP laminate: optical-fiber-based distributed measurement and numerical simulation

Autor:	Yusaku Ito, Nobuo Takeda, T. Obo, Shu Minakuchi
Rok vydání:	2014
Předmět:	Optical fiber Materials science Computer simulation Mechanical Engineering Composite number law.invention Brillouin zone Thermal shrinkage Mechanics of Materials law Ceramics and Composites Cure monitoring Composite material Curing (chemistry) Shrinkage
Zdroj:	Advanced Composite Materials. 24:325-342
ISSN:	1568-5519 0924-3046
DOI:	10.1080/09243046.2014.906914
Popis:	This study seeks to clarify the mechanism of strain development in curing a thick composite structure with a temperature distribution in the thickness direction. Strain developed during curing can be separated into two parts according to the causes. One is chemical cure shrinkage of the matrix; the other is thermal shrinkage (or expansion) of the cured composite. Therefore, this study consists of a cure-shrinkage part and a thermal-shrinkage part. In both parts, the curing was monitored with an embedded distributed optical-fiber sensor (pulse-pre-pump Brillouin optical-time-domain analysis, PPP-BOTDA) and analyzed. In the cure-shrinkage strain part, the strain distribution caused by different temperature histories was observed. We confirmed that the lower viscosity part was influenced by the cure shrinkage of the other part and that these phenomena can be analyzed by the visco-elastic cure model. In the thermal-strain part, the amount of total shrinkage strain and the apparent coefficient of temperature e...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::320e86439b22066e2bbdd261e391e72f https://doi.org/10.1080/09243046.2014.906914 Zobrazit plný text záznamu