{"corpus_id":107967325,"paper_sha":"0d6f4955f32f812f37240b4bb9acc6d5cc30045a","doi":"10.3989/IC.2007.V59.I506.512","arxiv_id":null,"pmid":null,"pmcid":null,"mag_id":142473639,"dblp_id":null,"acl_id":null,"title":"Los métodos de vibración como herramienta no destructiva para la estimación de las propiedades resistentes de la madera aserrada estructural","year":2007,"publication_date":"2007-06-30","venue":"","journal":{"name":"Informes De La Construccion","pages":"97-105","volume":"59"},"journal_issn":null,"journal_title":null,"publication_types":[],"pubmed_pub_types":null,"s2_fields_of_study":["Materials Science","Engineering"],"reference_count":15,"citation_count":8,"influential_citation_count":0,"is_open_access":true,"arxiv_categories":null,"arxiv_license":null,"arxiv_journal_ref":null,"mesh_headings":null,"chemicals":null,"comments_corrections":null,"source_flags":1,"s2_open_access_pdf_url":"https://informesdelaconstruccion.revistas.csic.es/index.php/informesdelaconstruccion/article/download/512/587/1044","s2_open_access_landing_url":"https://www.semanticscholar.org/paper/0d6f4955f32f812f37240b4bb9acc6d5cc30045a","s2_open_access_license":"CCBY","s2_open_access_status":"GOLD","pmc_open_access_pdf_url":null,"pmc_open_access_landing_url":null,"pmc_open_access_license":null,"pmc_open_access_status":null,"unpaywall_open_access_pdf_url":null,"unpaywall_open_access_landing_url":null,"unpaywall_open_access_license":null,"unpaywall_open_access_status":null,"abstract":"The non-destructive testing of structural sawn timber using the resonant frequency methods uses the natural frequency of pieces to assess the quality of test samples. This paper describes the theoretical basis of this non-destructive technique and an investigation into the suitability of this tool. The results of grading 120 pieces of gross cross-section (150 x 200 x 4,060 mm and 200 x 250 x 5,060 mm) structural timber of European black pine, (Pinus nigra subsp. salzmannii (Dunal) Franco) are shown. Furthermore, the specimens were tested for bending according to the UNE-EN 408: 2004 standard, to compare the values of strength and stiffness obtained from this test with the results estimated using the non-destructive method. PLG (the Portable Lumber Grader) developed at the Wood NDT Laboratory of the University of Western Hungary , in Sopron , was used to measure the frequency of the longitudinal stress wave. This equipment determines the frequency and the density of the specimens, and uses them, to evaluate the dynamic modulus of elasticity and to estimate the strength. For gross cross-section European black pine pieces, a strong relationship exists between dynamic modulus obtained by longitudinal vibration frequency and the mechanical properties. Acoustic measurements have become widely acceptable, because they are accurate, portable, cheap and easy to apply.","claims":[{"public_id":"cl_6c736ca8d8a351e44c7a14b54dd8540a","status":"active","text":"120 pieces of European black pine structural timber with gross cross-sections of 150 x 200 x 4,060 mm and 200 x 250 x 5,060 mm were graded using resonant frequency methods.","confidence":0.95,"contributors":[{"id":1165,"public_id":"ezd9qvkvax","public_label":"The Reverser‮ (ezd9qvkvax)","roles":["extraction"],"url":"https://sah.borca.ai/u/ezd9qvkvax"},{"id":2,"public_id":"4715169a40","public_label":"AK (4715169a40)","roles":["review"],"url":"https://sah.borca.ai/u/4715169a40"},{"id":17,"public_id":"322360f1c1","public_label":"Killer Whale (322360f1c1)","roles":["review"],"url":"https://sah.borca.ai/u/322360f1c1"}],"url":"https://sah.borca.ai/claims/cl_6c736ca8d8a351e44c7a14b54dd8540a"},{"public_id":"cl_93c24c3fdad462a829ff80b1dbe1fc2d","status":"active","text":"A strong relationship was found between dynamic modulus obtained by longitudinal vibration frequency and the mechanical properties of gross cross-section European black pine pieces.","confidence":0.9,"contributors":[{"id":1165,"public_id":"ezd9qvkvax","public_label":"The Reverser‮ (ezd9qvkvax)","roles":["extraction"],"url":"https://sah.borca.ai/u/ezd9qvkvax"},{"id":2,"public_id":"4715169a40","public_label":"AK (4715169a40)","roles":["review"],"url":"https://sah.borca.ai/u/4715169a40"},{"id":17,"public_id":"322360f1c1","public_label":"Killer Whale (322360f1c1)","roles":["review"],"url":"https://sah.borca.ai/u/322360f1c1"}],"url":"https://sah.borca.ai/claims/cl_93c24c3fdad462a829ff80b1dbe1fc2d"},{"public_id":"cl_6173e159a6c0e7c06a93afd91fb44fbf","status":"active","text":"Acoustic measurements using longitudinal vibration frequency are accurate, portable, cheap, and easy to apply for structural sawn timber grading.","confidence":0.85,"contributors":[{"id":1165,"public_id":"ezd9qvkvax","public_label":"The Reverser‮ (ezd9qvkvax)","roles":["extraction"],"url":"https://sah.borca.ai/u/ezd9qvkvax"},{"id":2,"public_id":"4715169a40","public_label":"AK (4715169a40)","roles":["review"],"url":"https://sah.borca.ai/u/4715169a40"},{"id":17,"public_id":"322360f1c1","public_label":"Killer Whale (322360f1c1)","roles":["review"],"url":"https://sah.borca.ai/u/322360f1c1"}],"url":"https://sah.borca.ai/claims/cl_6173e159a6c0e7c06a93afd91fb44fbf"},{"public_id":"cl_f8928a445e90b211b6c359c2b732d886","status":"active","text":"Bending tests according to UNE-EN 408:2004 were performed to compare strength and stiffness values with estimates from the non-destructive method.","confidence":0.9,"contributors":[{"id":1165,"public_id":"ezd9qvkvax","public_label":"The Reverser‮ (ezd9qvkvax)","roles":["extraction"],"url":"https://sah.borca.ai/u/ezd9qvkvax"},{"id":2,"public_id":"4715169a40","public_label":"AK (4715169a40)","roles":["review"],"url":"https://sah.borca.ai/u/4715169a40"},{"id":17,"public_id":"322360f1c1","public_label":"Killer Whale (322360f1c1)","roles":["review"],"url":"https://sah.borca.ai/u/322360f1c1"}],"url":"https://sah.borca.ai/claims/cl_f8928a445e90b211b6c359c2b732d886"},{"public_id":"cl_e1b7cfabb4b43732cabfe0c58c2245ba","status":"active","text":"The Portable Lumber Grader (PLG) measured longitudinal stress wave frequency and density to evaluate dynamic modulus of elasticity and estimate strength.","confidence":0.95,"contributors":[{"id":1165,"public_id":"ezd9qvkvax","public_label":"The Reverser‮ (ezd9qvkvax)","roles":["extraction"],"url":"https://sah.borca.ai/u/ezd9qvkvax"},{"id":2,"public_id":"4715169a40","public_label":"AK (4715169a40)","roles":["review"],"url":"https://sah.borca.ai/u/4715169a40"},{"id":17,"public_id":"322360f1c1","public_label":"Killer Whale (322360f1c1)","roles":["review"],"url":"https://sah.borca.ai/u/322360f1c1"}],"url":"https://sah.borca.ai/claims/cl_e1b7cfabb4b43732cabfe0c58c2245ba"}],"concepts":[{"public_id":"co_17fe1b9abd74550aa4c055c8a7fc60d3","status":"active","name":"dynamic modulus of elasticity","description":"Modulus calculated from frequency and density, used to estimate strength and stiffness.","types":["property"],"aliases":[],"contributors":[{"id":1165,"public_id":"ezd9qvkvax","public_label":"The Reverser‮ (ezd9qvkvax)","roles":["extraction"],"url":"https://sah.borca.ai/u/ezd9qvkvax"},{"id":2,"public_id":"4715169a40","public_label":"AK (4715169a40)","roles":["review"],"url":"https://sah.borca.ai/u/4715169a40"},{"id":17,"public_id":"322360f1c1","public_label":"Killer Whale (322360f1c1)","roles":["review"],"url":"https://sah.borca.ai/u/322360f1c1"}],"url":"https://sah.borca.ai/concepts/co_17fe1b9abd74550aa4c055c8a7fc60d3"},{"public_id":"co_1cf7dccfff0a2a731d6c5e09ff9b0ccb","status":"active","name":"longitudinal stress wave","description":"A stress wave traveling along the length of the timber piece used to measure frequency.","types":["measurement technique"],"aliases":[],"contributors":[{"id":1165,"public_id":"ezd9qvkvax","public_label":"The Reverser‮ (ezd9qvkvax)","roles":["extraction"],"url":"https://sah.borca.ai/u/ezd9qvkvax"},{"id":2,"public_id":"4715169a40","public_label":"AK (4715169a40)","roles":["review"],"url":"https://sah.borca.ai/u/4715169a40"},{"id":17,"public_id":"322360f1c1","public_label":"Killer Whale (322360f1c1)","roles":["review"],"url":"https://sah.borca.ai/u/322360f1c1"}],"url":"https://sah.borca.ai/concepts/co_1cf7dccfff0a2a731d6c5e09ff9b0ccb"},{"public_id":"co_213babe158b50329b9ca53bb24ffb4a7","status":"active","name":"Portable Lumber Grader (PLG)","description":"Device that measures longitudinal stress wave frequency and density to evaluate dynamic modulus and estimate strength.","types":["device"],"aliases":["PLG"],"contributors":[{"id":1165,"public_id":"ezd9qvkvax","public_label":"The Reverser‮ (ezd9qvkvax)","roles":["extraction"],"url":"https://sah.borca.ai/u/ezd9qvkvax"},{"id":2,"public_id":"4715169a40","public_label":"AK (4715169a40)","roles":["review"],"url":"https://sah.borca.ai/u/4715169a40"},{"id":17,"public_id":"322360f1c1","public_label":"Killer Whale (322360f1c1)","roles":["review"],"url":"https://sah.borca.ai/u/322360f1c1"}],"url":"https://sah.borca.ai/concepts/co_213babe158b50329b9ca53bb24ffb4a7"},{"public_id":"co_5e7fe1944a21dcb132a478a01977bada","status":"active","name":"resonant frequency methods","description":"Techniques that use natural vibration frequency to assess timber quality.","types":["method"],"aliases":[],"contributors":[{"id":1165,"public_id":"ezd9qvkvax","public_label":"The Reverser‮ (ezd9qvkvax)","roles":["extraction"],"url":"https://sah.borca.ai/u/ezd9qvkvax"},{"id":2,"public_id":"4715169a40","public_label":"AK (4715169a40)","roles":["review"],"url":"https://sah.borca.ai/u/4715169a40"},{"id":17,"public_id":"322360f1c1","public_label":"Killer Whale (322360f1c1)","roles":["review"],"url":"https://sah.borca.ai/u/322360f1c1"}],"url":"https://sah.borca.ai/concepts/co_5e7fe1944a21dcb132a478a01977bada"},{"public_id":"co_61c7a51e06e207d5081bea65ad51aaf3","status":"active","name":"gross cross-section","description":"Large cross-sectional dimensions of the tested timber pieces, specifically 150x200x4060 mm and 200x250x5060 mm.","types":["characteristic"],"aliases":[],"contributors":[{"id":1165,"public_id":"ezd9qvkvax","public_label":"The Reverser‮ (ezd9qvkvax)","roles":["extraction"],"url":"https://sah.borca.ai/u/ezd9qvkvax"},{"id":2,"public_id":"4715169a40","public_label":"AK (4715169a40)","roles":["review"],"url":"https://sah.borca.ai/u/4715169a40"},{"id":17,"public_id":"322360f1c1","public_label":"Killer Whale (322360f1c1)","roles":["review"],"url":"https://sah.borca.ai/u/322360f1c1"}],"url":"https://sah.borca.ai/concepts/co_61c7a51e06e207d5081bea65ad51aaf3"},{"public_id":"co_699a44a30333eb28789568698538c9ef","status":"active","name":"European black pine","description":"Tree species Pinus nigra subsp. salzmannii used in the study.","types":["species"],"aliases":["Pinus nigra subsp. salzmannii (Dunal) Franco"],"contributors":[{"id":1165,"public_id":"ezd9qvkvax","public_label":"The Reverser‮ (ezd9qvkvax)","roles":["extraction"],"url":"https://sah.borca.ai/u/ezd9qvkvax"},{"id":2,"public_id":"4715169a40","public_label":"AK (4715169a40)","roles":["review"],"url":"https://sah.borca.ai/u/4715169a40"},{"id":17,"public_id":"322360f1c1","public_label":"Killer Whale (322360f1c1)","roles":["review"],"url":"https://sah.borca.ai/u/322360f1c1"}],"url":"https://sah.borca.ai/concepts/co_699a44a30333eb28789568698538c9ef"},{"public_id":"co_905225c3a5c9141bae27c832c71c10b1","status":"active","name":"non-destructive testing","description":"Methods for evaluating timber properties without causing damage.","types":["method"],"aliases":[],"contributors":[{"id":1165,"public_id":"ezd9qvkvax","public_label":"The Reverser‮ (ezd9qvkvax)","roles":["extraction"],"url":"https://sah.borca.ai/u/ezd9qvkvax"},{"id":2,"public_id":"4715169a40","public_label":"AK (4715169a40)","roles":["review"],"url":"https://sah.borca.ai/u/4715169a40"},{"id":17,"public_id":"322360f1c1","public_label":"Killer Whale (322360f1c1)","roles":["review"],"url":"https://sah.borca.ai/u/322360f1c1"}],"url":"https://sah.borca.ai/concepts/co_905225c3a5c9141bae27c832c71c10b1"},{"public_id":"co_d19533bb65fd1d26c4e89d75091ee495","status":"active","name":"mechanical properties","description":"Strength and stiffness of timber determined from bending tests.","types":["property"],"aliases":[],"contributors":[{"id":1165,"public_id":"ezd9qvkvax","public_label":"The Reverser‮ (ezd9qvkvax)","roles":["extraction"],"url":"https://sah.borca.ai/u/ezd9qvkvax"},{"id":2,"public_id":"4715169a40","public_label":"AK (4715169a40)","roles":["review"],"url":"https://sah.borca.ai/u/4715169a40"},{"id":17,"public_id":"322360f1c1","public_label":"Killer Whale (322360f1c1)","roles":["review"],"url":"https://sah.borca.ai/u/322360f1c1"}],"url":"https://sah.borca.ai/concepts/co_d19533bb65fd1d26c4e89d75091ee495"},{"public_id":"co_d27d585a0d857f1c42cd3a9ec42185c0","status":"active","name":"UNE-EN 408:2004","description":"Standard for bending testing of structural timber.","types":["standard"],"aliases":[],"contributors":[{"id":1165,"public_id":"ezd9qvkvax","public_label":"The Reverser‮ (ezd9qvkvax)","roles":["extraction"],"url":"https://sah.borca.ai/u/ezd9qvkvax"},{"id":2,"public_id":"4715169a40","public_label":"AK (4715169a40)","roles":["review"],"url":"https://sah.borca.ai/u/4715169a40"},{"id":17,"public_id":"322360f1c1","public_label":"Killer Whale (322360f1c1)","roles":["review"],"url":"https://sah.borca.ai/u/322360f1c1"}],"url":"https://sah.borca.ai/concepts/co_d27d585a0d857f1c42cd3a9ec42185c0"},{"public_id":"co_fde17829d0e401229bba5a8dc834bfa6","status":"active","name":"acoustic measurements","description":"Measurements based on longitudinal vibration frequency for timber grading.","types":["method"],"aliases":[],"contributors":[{"id":1165,"public_id":"ezd9qvkvax","public_label":"The Reverser‮ (ezd9qvkvax)","roles":["extraction"],"url":"https://sah.borca.ai/u/ezd9qvkvax"},{"id":2,"public_id":"4715169a40","public_label":"AK (4715169a40)","roles":["review"],"url":"https://sah.borca.ai/u/4715169a40"},{"id":17,"public_id":"322360f1c1","public_label":"Killer Whale (322360f1c1)","roles":["review"],"url":"https://sah.borca.ai/u/322360f1c1"}],"url":"https://sah.borca.ai/concepts/co_fde17829d0e401229bba5a8dc834bfa6"},{"public_id":"co_fef584b2351587c6813811d8bd2212ea","status":"active","name":"structural sawn timber","description":"Timber pieces intended for structural use in construction.","types":["material"],"aliases":[],"contributors":[{"id":1165,"public_id":"ezd9qvkvax","public_label":"The Reverser‮ (ezd9qvkvax)","roles":["extraction"],"url":"https://sah.borca.ai/u/ezd9qvkvax"},{"id":2,"public_id":"4715169a40","public_label":"AK (4715169a40)","roles":["review"],"url":"https://sah.borca.ai/u/4715169a40"},{"id":17,"public_id":"322360f1c1","public_label":"Killer Whale (322360f1c1)","roles":["review"],"url":"https://sah.borca.ai/u/322360f1c1"}],"url":"https://sah.borca.ai/concepts/co_fef584b2351587c6813811d8bd2212ea"}],"external_ids":{"DOI":"10.3989/IC.2007.V59.I506.512","ArXiv":null,"PubMed":null,"PubMedCentral":null,"MAG":142473639,"DBLP":null,"ACL":null},"open_access":{"is_open_access":true,"pdf_url":"https://informesdelaconstruccion.revistas.csic.es/index.php/informesdelaconstruccion/article/download/512/587/1044","landing_url":"https://www.semanticscholar.org/paper/0d6f4955f32f812f37240b4bb9acc6d5cc30045a","source":"semantic_scholar","pdf_url_source":"semantic_scholar_open_access_pdf","license":"CCBY","status":"GOLD","reason":null},"reference_availability":{"status":"available","references_indexed":true,"full_text_available":false,"full_text_source":null,"count_basis":"semantic_scholar_metadata","extraction_status":"not_applicable","reason":null},"source":{"provider":"episteme2","base_corpus":"semantic_scholar_dump","freshness_mode":"unknown","basis":["semantic_scholar_metadata","postgres_metadata"],"limits":["paper metadata is based on indexed upstream scholarly datasets","claims and concepts are available only for extracted papers","absence of claims or concepts means no extracted graph data is available in this response"],"status":"available","degraded":false,"degraded_reasons":[],"diagnostics":{"status":"available","degraded":false,"degraded_reasons":[],"metadata_status":"available","graph_status":"available","abstract_status":"available"},"source_flags":1},"paper_id":630828,"paper_uid":"0ead435e-ce1e-404b-b09e-2f25fbcbbfd5","canonical_identity":{"paper_id":630828,"paper_uid":"0ead435e-ce1e-404b-b09e-2f25fbcbbfd5","identity_status":"available","lookup_basis":"semantic_scholar_external_id","compatibility_path":"corpus_id"},"url":"https://sah.borca.ai/papers/107967325"}