Understanding the thermal durability of wood-based composites (WBCs) using crack propagation fracture toughness

Autor:	Arijit Sinha, John A. Nairn, Sweta Mahapatra
Rok vydání:	2021
Předmět:	040101 forestry Biomaterials Materials science Fracture toughness Thermal 0401 agriculture forestry and fisheries Fracture mechanics 04 agricultural and veterinary sciences 02 engineering and technology Composite material 021001 nanoscience & nanotechnology 0210 nano-technology Durability
Zdroj:	Holzforschung. 75:1032-1041
ISSN:	1437-434X 0018-3830
Popis:	Wood-based composites (WBCs) are engineered wood products that are commonly used in the building and furniture industries. Most research on their durability has relied on internal bond testing, bending strength properties, or damage observations. An alternative property with potentially more information is fracture toughness. Here, fracture toughness was continuously measured during crack propagation for three different composites—oriented strand board (OSB), medium density fiberboard (MDF), and particleboard (PB). The resulting plots for fracture toughness as a function of crack growth are known as the material’s R curve. To assess the role of temperature on WBC durability, R curve experiments were repeated at 10 different temperatures from 20 to 200 °C. Trends in experimental results could be described by a trilinear model. OSB and MDF toughness initially increased with temperature and then decreased above 80 °C. The toughness of PB, which was made with a different resin, remained constant or decreased slightly until decreasing faster above 140 °C. Both the resin type and composite structure affected the results.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::122eba2edd93b93ed7a3f2fd597a4a4c https://doi.org/10.1515/hf-2021-0007 Zobrazit plný text záznamu