| Description |
1 online resource (38 pages) : illustrations. |
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text txt rdacontent |
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computer c rdamedia |
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online resource cr rdacarrier |
| Series |
Research paper FPL-RP ; 712 |
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Research paper FPL-RP ; 712.
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| Note |
"December 2021." |
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In scope of the U.S. Government Publishing Office Cataloging and Indexing Program (C&I) and Federal Depository Library Program (FDLP). |
| Bibliography |
Includes bibliographical references (pages 13-14). |
| Summary |
"To properly evaluate the reliability of lumber structures, good models for the strength distributions of their components are needed. Modulus of rupture (MOR) distributions of structural lumber grades have often been modeled as two-parameter Weibulls. However, in a series of papers, Verrill and others have established that strength properties of visual and machine stress rated grades of lumber are not distributed as two-parameter Weibulls and that modeling them as two-parameter Weibulls can yield large over- or underestimates of probabilities of breakage. Instead, grades of lumber have "pseudo-truncated" distributions. Recent research also established that the appropriate MOR model can change significantly with location and time and that model differences have practical significance. Verrill and others concluded that "there maybe significant efficiencies that can be obtained through the development of computer models that yield real-time in-line estimates of lumber properties based on measurements of stiffness, specific gravity, knot size and location, slope of grain, and other strength predictors." In this paper, we discuss models that predict the MOR of a piece of lumber from modulus of elasticity, specific gravity, slope of grain, and knot data." |
| Note |
Description based on online resource; title from PDF cover (USFS, viewed Jan. 5, 2023). |
| Subject |
Weibull distribution.
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Lumber -- Measurement.
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Elasticity.
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Strength of materials.
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Lumber -- Grading.
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Specific gravity.
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Computer simulation.
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Stress-strain curves.
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Digital computer simulation.
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Loi de Weibull.
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Élasticité.
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Résistance des matériaux.
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Bois -- Classement.
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Densité.
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Simulation par ordinateur.
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Courbes contrainte-déformation.
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Bois -- Mesure.
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modulus of elasticity.
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elasticity.
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strength of materials.
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specific gravity.
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simulation.
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Lumber -- Measurement
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Computer simulation
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Digital computer simulation
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Elasticity
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Lumber -- Grading
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Specific gravity
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Strength of materials
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Stress-strain curves
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Weibull distribution
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| Added Author |
Verrill, S. P., author.
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Forest Products Laboratory (U.S.), issuing body.
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| Gpo Item No. |
0083-B (online) |
| Sudoc No. |
A 13.78:FPL-RP-712 |
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