3D Wood

Quantifying Wood Anatomy

Research

research


Recent Research Highlights

Research being conducted by Kyle Mirabile, Elizabeth Parcell Sharp, Scott Renneckar, and Audrey Zink-Sharp is shedding some light on what features of Douglas-fir versus southern yellow pine are likely leading to the inability of certain adhesives to qualify for use in structural applications that must withstand cyclic moisture conditions. Read more here.

Our research goals are to…


Relate wood anatomy to tree growth, environmental conditions, and environmental disturbances

Walker, D.M., Copenheaver, C.A., and Zink-Sharp, A. 2014. Radial growth changes following hemlock woolly adelgid infestation of eastern hemlock.  Annals of Forest Science 71(5):595-602.

Jeong, G.Y. and A. Zink-Sharp.  2013.  Anatomical variability within a loblolly pine tree under thinning management. Wood and Fiber Science. 45(1):119-122. Relate wood anatomy to properties

Jeong, G.Y. and A. Zink-Sharp.  2012.  Impact of fertilization on within-tree variability in young loblolly pine. Wood and Fiber Science. 44(3):334-337.

B.J. Hook, C.A. Copenheaver, A. Zink-Sharp.  2011.  Compression wood formation in Pinus strobus L. following ice storm damage in southwestern Virginia, USA. The Journal of the Torrey Botanical Society 138(1):52-61.

Mettanurak, T. A. Zink-Sharp, C. A. Copenheaver, and S.M. Zedaker.  2010.  Effect of growth suppression and release on strength and specific gravity of yellow-poplar. Canadian Journal of Forest Research 40(2010):1661-1670.

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Create nanocellulose and nanofiber composites

Johnson, R.K., A. Zink-Sharp, and W.G. Glasser.  2011.  Preparation and characterization of hydrophobic derivatives of TEMPO-oxidized nanocelluloses. Cellulose 2011(18):1599-1609.

Johnson, R.K., A. Zink-Sharp, S.Renneckar, and W.G. Glasser.  2009.  A new bio-based nanocomposite: Fibrillated TEMPO-oxidized celluloses in hydroxypropylcellulose matrix. Cellulose 16(2):227-238.

Johnson, R.K., A. Zink-Sharp, S.H. Renneckar, W.G. Glasser.  2008.  Mechanical properties of wetlaid lyocell and hybrid fiber-reinforced composites with polypropylene. Composites Part A: Applied Science and Manufacturing 39(3) 470-477.

Rennekar, Scott, Audrey Zink-Sharp, and Wolfgang Glasser.  2007.  Fiber modification by steam-explosion: Microscopic analysis of co-refined wood and polypropylene. IAWA Journal 28(1):13-27.

Renneckar, S., Zink-Sharp, A.G., and Glasser, W.G.  2006.  Fiber surface modification by steam-explosion: Sorption studies with co-refined wood and polyolefins. Wood and Fiber Science 38(3):427-438.

Renneckar, S., Johnson, R. K., Zink-Sharp, A.G., and Glasser, W.G.  2005.  Fiber modification by steam-explosion: 13C NMR and dynamic mechanical analysis studies of co-refined wood and polypropylene. Composite Interfaces 12(6):559-580.

Renneckar, S., Johnson, R.K., Zink-Sharp, A., Sun, N., and Glasser, W.G.  2005.  13C NMR and dynamic mechanical analysis of co-refined wood and polypropylene. Composite Interfaces 12(6):559-580.

Renneckar, S., Zink-Sharp, A.G., Ward, T.C. and Glasser, W.G.  2004.  Compositional Analysis of Thermoplastic Wood Composites by TGA. Journal of Applied Polymer Science 93(3):1484-1492

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Characterize relationships between wood anatomy and product properties/processing to create improved composite materials

Nicoli, E., Dillard, D.A., Frazier, C.E, Zink-Sharp, A.  2012.  Characterization of mixed-mode I/II fracture properties of adhesively bonded yellow-poplar by a dual actuator test frame instrument. Holzforschung 66:623-631.

Jeong, G. Y., D. P. Hindman, and A. Zink-Sharp.  2010.  Orthotropic properties of loblolly pine (Pinus taeda) strands. Journal of Materials Science 45(21):5820-5830.

Jennings, J.D., A. Zink-Sharp, C.E. Frazier, F.A. Kamke.  2006.  Properties of compression densified wood. Part 2: Surface Energy. Journal of Adhesion Science and Technology 20(4)335-344.

Zink-Sharp, A. and C. Price.  2006.  Compression strength parallel to the grain within growth rings of low density hardwoods. Maderas: Ciencia y Tecnologia 8(2):117-126.

Jennings, J.E., A. Zink-Sharp, F.A. Kamke, C.E. Frazier.  2005.  Properties of compression densified wood. Part 1: Bond performance. Journal of Adhesion Science and Technology 19(13-14):1249-1261.

Deomano, E. and A. Zink-Sharp.  2005.  Effect of species, cutting direction, dimensions, and temperature on flake drying. Forest Products Journal 55(9):31-36.

Gu, H. M. and A. Zink-Sharp.  2005.  Geometric model for softwood transverse thermal conductivity. Wood and Fiber Science 37(4):699-711.

Deomano, E. and A. Zink-Sharp.  2004.  Bending properties of wood flakes of three southern species. Wood and Fiber Science 36(4):493-499.

Via, B.V., A. Zink-Sharp, F.E. Woeste, and J.D. Dolan.  2001.  Influence of embedment gap on metal plate truss connections. Forest Products Journal 51(10):88-92.

Gu, H.-M., J. Sell, and A. Zink-Sharp.  2001.  Role of cell wall structure on transverse differential shrinkage of wood. Holz als Roh-und Werkstoff 59(6):436-442.

Via, B. K., A. Zink-Sharp, F. E. Woeste and J. D. Dolan.  2001.  Influence of specific gravity on embedment gaps in metal-plate-connected truss joints. Forest Products Journal 51(10):88-92.

Zink-Sharp, A., J.W. Stelmokas, and H.-M. Gu.  1999.  Effects of wood anatomy on the mechanical behavior of single bolted connections. Wood and Fiber Science 31(3):249-263.

Gu, H.-M. and A. Zink-Sharp.  1999.  Measurement of moisture gradients in wood. Forest Products Journal 49(4):77-86.

Via, B.V., A. Zink-Sharp, F.E. Woeste, and J.D. Dolan.  1999.  Relationship between tooth withdrawal strength and specific gravity. Forest Products Journal 49(7/8):56-63.

Zink, A.G. and E. Kartunova.  1998.  Wood failure in plywood shear samples measured with image analysis. Forest Products Journal 48(4):69-74.

Stelmokas, J.W., A.G. Zink, J.L. Loferski, and J.D. Dolan.  1997.  Measurement of load distribution among multiple-bolted wood connections. Journal of Testing and Evaluation 25(5):510-515.

Zink, A.G., R.W. Davidson, and R.B. Hanna.  1997.  Effect of composite structure on strain and failure of laminar and wafer composites. Mechanics of Composite Materials and Structures 4(4):345-359.

Zink A.G., R.W. Davidson, and R.B. Hanna.  1996.  The influence of overlap length on adhesive joint strength. Wood and Fiber Science 28(1):62-73.

Zink, A.G., R.W. Davidson, and R.B. Hanna.  1996.  Finite element modeling of bonded wood connections. Journal of Adhesion 56(1996):217-228.

Salenikovich, A.J., J.R. Loferski, and A.G. Zink.  1996.  Understanding the performance of laterally loaded wood connections assembled with multiple bolts. Wood Design Focus 7(4):19-26.

Zink, A.G., P.J. Pellicane, and R.A. Anthony.  1995.  A stress transformation approach to predicting the failure mode of wood. Wood Science and Technology 30(1995):21-30.

Zink, A.G., P.J. Pellicane, and C.E. Shuler.  1994.  Ultrastructural analysis of softwood fracture surfaces. Wood Science and Technology 28(1994):239-338.

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Enhance wood science, youth, and distance education

Wood Magic: A wood science curriculum for fourteen to eighteen year olds. 2008. Zink-Sharp, A. and Davis, J. Virginia Cooperative Extension.

http://pubs.ext.vt.edu/388/388-809/388-809_pdf.pdf

Wood Magic: A wood science curriculum for nine to eleven year olds. 2005. Zink-Sharp, A. and J. Bussey. Virginia Cooperative Extension.

http://pubs.ext.vt.edu/388/388-807/388-807_pdf.pdf

Pugh, C.E., B.B. Lockee, and A. Zink-Sharp.  2003.  Instructional design model for a distance education program. Forest Products Journal 53(9):6-14.

http://woodmagic.vt.edu/PDF/FPJpaperwithcover.pdf

Zink, A.G.  1998.  Elements of a successful undergraduate student recruiting program. Women in Natural Resources 19(3):9-11.

Zink, A.G.  1997.  Elements of a successful undergraduate student recruiting program. Wood and Fiber Science 29(2):142-147.

http://woodmagic.vt.edu/


Pioneer and apply digital image correlation for measurement of properties

Velez-Garcia, G.M., P. Wapperom, V. Kunc, D.G. Baird and A. Zink-Sharp.  2012.  Sample preparation and image acquisition using optical-reflective microscopy in the measurement of fiber orientation in thermoplastic composites. Journal of Microscopy. 248(1):23-33.

Jeong, G. Y., A. Zink-Sharp, and D. P. Hindman.  2010.  Applying digital image correlation to wood strands: influence of loading rate and thickness. Holzforschung 64(6):729-734.

Jeong, G. Y., A. Zink-Sharp, and D. P. Hindman.  2009.  Tensile properties of earlywood and latewood from Loblolly Pine (Pinus taeda) Using Digital Image Correlation. Wood and Fiber Science 41(1):51-63.

Jeong, G.Y., A. Zink-Sharp, and D.P. Hindman.  2009.  Tensile properties of earlywood and latewood from loblolly pine using digital image correlation. Wood and Fiber Science 41(1):51-63.

Stelmokas, J.W., A.G. Zink, and J.L. Loferski.  1997.  Image correlation analysis of multiple-bolted wood connections. Wood and Fiber Science 29(3):210-227.

Zink, A.G., R.B. Hanna, and J.W. Stelmokas.  1997.  Measurement of Poisson’s ratios for yellow-poplar. Forest Products Journal 47(3):78-80.

Zink, A.G., R.W. Davidson, and R.B. Hanna.  1996.  Experimental measurement of the strain distribution in double overlap wood adhesive joints. Journal of Adhesion 56(1996):27-43.

Zink, A.G., R.W. Davidson, and R.B. Hanna.  1995.  Strain measurement in wood using a digital image correlation technique. Wood and Fiber Science 27(4):346-359.