{"title":"Service life of sailplanes made of CFRP","authors":"C. Kensche","doi":"10.1016/0015-0568(83)90007-6","DOIUrl":null,"url":null,"abstract":"<div><p>For up to ten years primary structures of carbon fibre reinforced plastics (CFRP) were applied to prototypes of sailplanes. The starting of mass production two years ago required the definition of admissible service life. For gliders made of glass fibre reinforced plastics (GFRP) 3000 authorised flight hours have been the limit till now. Some of them reached this limit.</p><p>Because of its inherent capacities CFRP enables the permission of a sizeably higher stress level and longer servive life compared to GFRP.</p><p>This paper presents the results of investigations on two spars and one wing in CFRP design carried out at the Institut für Bauweisen- und Konstruktionsforschung of the DFVLR in Stuttgart. For the simulation of the service-loads we employed the loading programme commonly used in Germany.</p><p>After these dynamic loadings the spars and the wing were tested for residual strength. Periodic measurements allowed observation of stiffness behaviour during the simulated service life of 18 000 h.</p></div>","PeriodicalId":100525,"journal":{"name":"Fibre Science and Technology","volume":"18 2","pages":"Pages 95-108"},"PeriodicalIF":0.0000,"publicationDate":"1983-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0015-0568(83)90007-6","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Fibre Science and Technology","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0015056883900076","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1
Abstract
For up to ten years primary structures of carbon fibre reinforced plastics (CFRP) were applied to prototypes of sailplanes. The starting of mass production two years ago required the definition of admissible service life. For gliders made of glass fibre reinforced plastics (GFRP) 3000 authorised flight hours have been the limit till now. Some of them reached this limit.
Because of its inherent capacities CFRP enables the permission of a sizeably higher stress level and longer servive life compared to GFRP.
This paper presents the results of investigations on two spars and one wing in CFRP design carried out at the Institut für Bauweisen- und Konstruktionsforschung of the DFVLR in Stuttgart. For the simulation of the service-loads we employed the loading programme commonly used in Germany.
After these dynamic loadings the spars and the wing were tested for residual strength. Periodic measurements allowed observation of stiffness behaviour during the simulated service life of 18 000 h.
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