Effect of artificial inhomogeneity of density and drilling on dynamic properties developed by poplar block species (Populus nigra) jointed with oak wood (Quercus castaneifolia) beams
Inhomogeneities in wood and wood products are evident. Sometimes these inhomogeneities are combined with other inhomogeneities such as drilling. Each can have different effects on dynamic properties, and these footprints can cause hidden defects in wood and wood products. In this research, the effec...
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| Veröffentlicht in: | Bioresources 2020-08, Vol.15 (3), p.4711-4726 |
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| creator | Kohantorabi, Mostafa Hemmasi, Amirhooman Talaeipour, Mohammad Roohnia, Mehran Bazyar, Behzad |
| description | Inhomogeneities in wood and wood products are evident. Sometimes these inhomogeneities are combined with other inhomogeneities such as drilling. Each can have different effects on dynamic properties, and these footprints can cause hidden defects in wood and wood products. In this research, the effects of artificial inhomogeneity of density and drilling diameters (1 mm, 3 mm, 5 mm, and 10 mm) on dynamic properties of the beams produced from oak wood jointed with poplar blocks (one at the end and the other at the central part of the beam) were investigated. Free vibration on a free-free beam test was subjected for the evaluations. The results indicated that factors such as dynamic modulus of elasticity, acoustic coefficients, and damping capacity, were affected by both inhomogeneity and drillings. The acoustical converting efficiency showed the exact location of inhomogeneity. It also showed the level of drilling diameter. |
| doi_str_mv | 10.15376/biores.15.3.4711-4726 |
| format | Article |
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Sometimes these inhomogeneities are combined with other inhomogeneities such as drilling. Each can have different effects on dynamic properties, and these footprints can cause hidden defects in wood and wood products. In this research, the effects of artificial inhomogeneity of density and drilling diameters (1 mm, 3 mm, 5 mm, and 10 mm) on dynamic properties of the beams produced from oak wood jointed with poplar blocks (one at the end and the other at the central part of the beam) were investigated. Free vibration on a free-free beam test was subjected for the evaluations. The results indicated that factors such as dynamic modulus of elasticity, acoustic coefficients, and damping capacity, were affected by both inhomogeneity and drillings. The acoustical converting efficiency showed the exact location of inhomogeneity. 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It also showed the level of drilling diameter.</description><subject>Acoustics</subject><subject>Damping capacity</subject><subject>Density</subject><subject>Drilling</subject><subject>Free vibration</subject><subject>Hardwoods</subject><subject>Inhomogeneity</subject><subject>Mechanical properties</subject><subject>Oak</subject><subject>Poplar</subject><subject>Storage modulus</subject><subject>Trends</subject><subject>Vibration</subject><subject>Wood</subject><subject>Wood products</subject><issn>1930-2126</issn><issn>1930-2126</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><sourceid>BENPR</sourceid><recordid>eNpNkctKxDAUhosoeH0FCbjRRcckbdN2KeINBBXch5PbmDGT1KRV5sV8PlPHhaucn_OdnMtfFKcEL0hTtexS2BB1ymJRLeqWkLJuKdspDkhf4ZISynb_xfvFYUorjOuuIvig-L4xRssRBYMgjtZYacEh69_COiy113bczDmlfZpD8AqpaJ2zfomCR2rjYW0lGmIYdK7XKaOf2mWlkNigIQwOIhIuyHeUBi1n4vw5DJObEvJ2GeECrYL1Y-a_7PiGAryjrxAUOn-ZdJSZkpBGyJOY4GymhYZ1Oi72DLikT_7eo-L19ub1-r58fLp7uL56LCVtu7GUWlEmWaNB1D2mxBiGBSZSKqkU6xRTnZF9Cw10qmmEqJkiQkHfN9AIoNVRcbb9Nu_3Mek08lWYos8dOW1I39F86C5TbEvJGFKK2vAh2jXEDSeY_1rEtxZlwSs-W8Rni6ofZcyMhg</recordid><startdate>20200801</startdate><enddate>20200801</enddate><creator>Kohantorabi, Mostafa</creator><creator>Hemmasi, Amirhooman</creator><creator>Talaeipour, Mohammad</creator><creator>Roohnia, Mehran</creator><creator>Bazyar, Behzad</creator><general>North Carolina State University</general><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7X2</scope><scope>8FE</scope><scope>8FH</scope><scope>8FK</scope><scope>ABUWG</scope><scope>AEUYN</scope><scope>AFKRA</scope><scope>ATCPS</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BHPHI</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>M0K</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope></search><sort><creationdate>20200801</creationdate><title>Effect of artificial inhomogeneity of density and drilling on dynamic properties developed by poplar block species (Populus nigra) jointed with oak wood (Quercus castaneifolia) beams</title><author>Kohantorabi, Mostafa ; 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Sometimes these inhomogeneities are combined with other inhomogeneities such as drilling. Each can have different effects on dynamic properties, and these footprints can cause hidden defects in wood and wood products. In this research, the effects of artificial inhomogeneity of density and drilling diameters (1 mm, 3 mm, 5 mm, and 10 mm) on dynamic properties of the beams produced from oak wood jointed with poplar blocks (one at the end and the other at the central part of the beam) were investigated. Free vibration on a free-free beam test was subjected for the evaluations. The results indicated that factors such as dynamic modulus of elasticity, acoustic coefficients, and damping capacity, were affected by both inhomogeneity and drillings. The acoustical converting efficiency showed the exact location of inhomogeneity. 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| source | DOAJ Directory of Open Access Journals; EZB-FREE-00999 freely available EZB journals |
| subjects | Acoustics Damping capacity Density Drilling Free vibration Hardwoods Inhomogeneity Mechanical properties Oak Poplar Storage modulus Trends Vibration Wood Wood products |
| title | Effect of artificial inhomogeneity of density and drilling on dynamic properties developed by poplar block species (Populus nigra) jointed with oak wood (Quercus castaneifolia) beams |
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