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Curvature analysis for composite with orthogonal, asymmetrical multi‐layer structure

Abstract

An option for reducing material consumption in bent construction is flat plate replacement with a curved or saddle shaped plate (shell). This option applies to plywood sheet, provided that the curved or saddle shaped plates are made in widely used multilevel plywood presses with parallel shelves using layers with an appropriate physical properties, geometric dimensions and orientation, creating a structurally asymmetrical sheet, relative to mid‐surface. Improved currently used method for calculation of curvature with taking into account curvature interaction effect and elastic characteristic change in moisture changing process. Compared results obtained by improved method and finite element method. Using improved method calculated values of curvature for a sheet with different geometrical properties and moisture conditions.


Santrauka


Lenkiamuju konstrukciju medžiagu sanaudas mažina plokščio lakšto pakeitimas sulenktu arba balno pavidalo lakštu (kevalu). Šis pasirinkimas taikomas klijuotes lakštams užtikrinus, kad sulenkti arba balno pavidalo lakštai yra padaromi naudojant keliu lygiu klijuotes presus su lygiagrečiomis lentynomis, imant tinkamu fizikiniu savybiu, geometriniu matmenu ir orientavimo sluoksnius bei sukuriant struktūriškai asimetrinius lakštus, susijusius su viduriniu paviršiumi. Patobulintas dabar taikomas metodas kreivumui skaičiuoti, atsižvelgiant i kreivumo saveikos poveiki ir dregnio kitimo vyksmo tampruji būdingaji pokyti. Palyginti rezultatai, gauti patobulintu ir baigtiniu elementu metodais. Taikant patobulinta metoda, apskaičiuotos kreivumo reikšmes lakštams, kuriu yra ivairūs geometriniai rodikliai ir ivairios dregnumo salygos.


First Published Online: 24 Jun 2011


Reikšminiai žodžiai: poslinkiaikreivio saveikamedienos kompozitasdregnio poveikis tampriosioms savybemsbalno pavidalo paviršiai

Keyword : displacements, curvature interaction, moisture influence on elastic properties, wood composite, saddle-shaped surface

How to Cite
Šliseris, J., & Rocēns, K. (2010). Curvature analysis for composite with orthogonal, asymmetrical multi‐layer structure. Journal of Civil Engineering and Management, 16(2), 242-248. https://doi.org/10.3846/jcem.2010.28
Published in Issue
Jun 30, 2010
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