Abstract
Several basic uses of timber depend on the toughness, property not widely studied to tropical species grown in Brazil. This work aimed to evaluate the influence of moisture content and growth rings position in values of toughness. In order to reach these objects, species like Angelim Saia (Vatairea sp), Eucalipto Citriodora (Eucalyptus citriodora), Eucalipto Grandis (Eucalyptus grandis), Pinus Elliottii (Pinus elliottii), were employed with well-sampled and seasoned specimens. Besides, relationship between toughness and wood density at 12% of moisture, toughness and wood strength in compression parallel to the grain, toughness and modulus of rupture in static bending test were determined. To reach these subjects, results obtained for thirty-six tropical species grown in Brazil, no less than twelve specimens for specie, were considered. All tests were conducted according to the indications of Annex B of the Brazilian Standard to the Design of Timber Structures (NBR 7190/1997). Toughness results were calculated according to the procedures of American Society for Testing and Materials (ASTM) D143-52. To survey the results, procedures employed were regression analysis, comparison between two media and pairing test, usual in these cases.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
