Curvature analysis for composite with orthogonal, asymmetrical multi‐layer structure
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 usi...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Vilnius Gediminas Technical University
2010-06-01
|
| Series: | Journal of Civil Engineering and Management |
| Subjects: | |
| Online Access: | https://journals.vgtu.lt/index.php/JCEM/article/view/5945 |
| _version_ | 1818821644499550208 |
|---|---|
| author | Jānis Šliseris Kārlis Rocēns |
| author_facet | Jānis Šliseris Kārlis Rocēns |
| author_sort | Jānis Šliseris |
| collection | DOAJ |
| description | 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: poslinkiai, kreivio saveika, medienos kompozitas, dregnio poveikis tampriosioms savybems, balno pavidalo paviršiai |
| first_indexed | 2024-12-18T23:11:28Z |
| format | Article |
| id | doaj.art-a0ffec3ef9374695b95b316c37568fac |
| institution | Directory Open Access Journal |
| issn | 1392-3730 1822-3605 |
| language | English |
| last_indexed | 2024-12-18T23:11:28Z |
| publishDate | 2010-06-01 |
| publisher | Vilnius Gediminas Technical University |
| record_format | Article |
| series | Journal of Civil Engineering and Management |
| spelling | doaj.art-a0ffec3ef9374695b95b316c37568fac2022-12-21T20:48:20ZengVilnius Gediminas Technical UniversityJournal of Civil Engineering and Management1392-37301822-36052010-06-01162Curvature analysis for composite with orthogonal, asymmetrical multi‐layer structureJānis Šliseris0Kārlis Rocēns1Riga Technical University, 1 Kalķu Street, LV-1658 Riga, LatviaRiga Technical University, 1 Kalķu Street, LV-1658 Riga, LatviaAn 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: poslinkiai, kreivio saveika, medienos kompozitas, dregnio poveikis tampriosioms savybems, balno pavidalo paviršiaihttps://journals.vgtu.lt/index.php/JCEM/article/view/5945displacementscurvature interactionmoisture influence on elastic propertieswood compositesaddle-shaped surface |
| spellingShingle | Jānis Šliseris Kārlis Rocēns Curvature analysis for composite with orthogonal, asymmetrical multi‐layer structure Journal of Civil Engineering and Management displacements curvature interaction moisture influence on elastic properties wood composite saddle-shaped surface |
| title | Curvature analysis for composite with orthogonal, asymmetrical multi‐layer structure |
| title_full | Curvature analysis for composite with orthogonal, asymmetrical multi‐layer structure |
| title_fullStr | Curvature analysis for composite with orthogonal, asymmetrical multi‐layer structure |
| title_full_unstemmed | Curvature analysis for composite with orthogonal, asymmetrical multi‐layer structure |
| title_short | Curvature analysis for composite with orthogonal, asymmetrical multi‐layer structure |
| title_sort | curvature analysis for composite with orthogonal asymmetrical multi layer structure |
| topic | displacements curvature interaction moisture influence on elastic properties wood composite saddle-shaped surface |
| url | https://journals.vgtu.lt/index.php/JCEM/article/view/5945 |
| work_keys_str_mv | AT janissliseris curvatureanalysisforcompositewithorthogonalasymmetricalmultilayerstructure AT karlisrocens curvatureanalysisforcompositewithorthogonalasymmetricalmultilayerstructure |