Effect of Cyclic Loading on Bending Stiffness of Glued Laminated Pieces
Glued laminated timber (Glulam) is important structural solution. Knowing its mechanical response under repeated forces, a gap in knowledge area, is fundamental to guarantee structures long-term performance. This study aims evaluating Glulam behavior under fatigue, considering excitation frequency (...
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Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)
2025-07-01
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| Series: | Materials Research |
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| author | Clara Gaspar Fossi de Souza Giovana Gobatto Balanco Leonor da Cunha Mastela André Luis Christoforo Francisco Antonio Rocco Lahr |
| author_facet | Clara Gaspar Fossi de Souza Giovana Gobatto Balanco Leonor da Cunha Mastela André Luis Christoforo Francisco Antonio Rocco Lahr |
| author_sort | Clara Gaspar Fossi de Souza |
| collection | DOAJ |
| description | Glued laminated timber (Glulam) is important structural solution. Knowing its mechanical response under repeated forces, a gap in knowledge area, is fundamental to guarantee structures long-term performance. This study aims evaluating Glulam behavior under fatigue, considering excitation frequency (1 and 2Hz); cycles number (NC – six levels) and their interactions. Marupá and Pequiá, tropical species within density range of Brazilian Code NBR 7190-1, were adopted. Adhesive RS-216-M (CASCO ®, Hexion), usual in industry, was chosen. Modulus of elasticity in bending (E), obtained before cyclic forces application, was taken as reference and determined based usual equation. Results indicated slight stiffness decrease after repeated forces on Glulam pieces. E mean presented significant variation (by ANOVA, 95% significance) when NC ranges from 1,000 to 691,200, both frequencies. NC and frequency explained E variations for Marupá; for Pequiá, only NC. Glue lines were evaluated, in function of NC, without problems identified, enabling both species for Glulam manufacture. |
| format | Article |
| id | doaj-art-26df2d19052b40c49a55b3b89770a022 |
| institution | Kabale University |
| issn | 1516-1439 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol) |
| record_format | Article |
| series | Materials Research |
| spelling | doaj-art-26df2d19052b40c49a55b3b89770a0222025-08-20T03:30:24ZengAssociação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)Materials Research1516-14392025-07-012810.1590/1980-5373-mr-2025-0200Effect of Cyclic Loading on Bending Stiffness of Glued Laminated PiecesClara Gaspar Fossi de Souzahttps://orcid.org/0000-0002-4811-4037Giovana Gobatto Balancohttps://orcid.org/0000-0002-2544-3743Leonor da Cunha Mastelahttps://orcid.org/0000-0003-1393-3283André Luis Christoforohttps://orcid.org/0000-0002-4066-080XFrancisco Antonio Rocco Lahrhttps://orcid.org/0000-0002-3510-8498Glued laminated timber (Glulam) is important structural solution. Knowing its mechanical response under repeated forces, a gap in knowledge area, is fundamental to guarantee structures long-term performance. This study aims evaluating Glulam behavior under fatigue, considering excitation frequency (1 and 2Hz); cycles number (NC – six levels) and their interactions. Marupá and Pequiá, tropical species within density range of Brazilian Code NBR 7190-1, were adopted. Adhesive RS-216-M (CASCO ®, Hexion), usual in industry, was chosen. Modulus of elasticity in bending (E), obtained before cyclic forces application, was taken as reference and determined based usual equation. Results indicated slight stiffness decrease after repeated forces on Glulam pieces. E mean presented significant variation (by ANOVA, 95% significance) when NC ranges from 1,000 to 691,200, both frequencies. NC and frequency explained E variations for Marupá; for Pequiá, only NC. Glue lines were evaluated, in function of NC, without problems identified, enabling both species for Glulam manufacture.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392025000100259&lng=en&tlng=enBending testCyclic forcesPhenol-resorcinolMicroscopy |
| spellingShingle | Clara Gaspar Fossi de Souza Giovana Gobatto Balanco Leonor da Cunha Mastela André Luis Christoforo Francisco Antonio Rocco Lahr Effect of Cyclic Loading on Bending Stiffness of Glued Laminated Pieces Materials Research Bending test Cyclic forces Phenol-resorcinol Microscopy |
| title | Effect of Cyclic Loading on Bending Stiffness of Glued Laminated Pieces |
| title_full | Effect of Cyclic Loading on Bending Stiffness of Glued Laminated Pieces |
| title_fullStr | Effect of Cyclic Loading on Bending Stiffness of Glued Laminated Pieces |
| title_full_unstemmed | Effect of Cyclic Loading on Bending Stiffness of Glued Laminated Pieces |
| title_short | Effect of Cyclic Loading on Bending Stiffness of Glued Laminated Pieces |
| title_sort | effect of cyclic loading on bending stiffness of glued laminated pieces |
| topic | Bending test Cyclic forces Phenol-resorcinol Microscopy |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392025000100259&lng=en&tlng=en |
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