Professor
Research Interests:
Forest Sciences Centre 2935
2424 Main Mall
Vancouver, BC V6T 1Z4
Canada
work phone: 6048220081

Advancing fundamental understanding of bonding processes in advanced wood composites. – Quantification of the processing-structure-property relationships of reconstituted wood composites. – Application of fracture mechanics to the bonding of wood composites. – Developing realistic, mechanism based models that describe blending processes for OSB and MDF. – Development of new classes of advanced composite wood products.


Projects

Development of Bamboo Composites for structural lumber applications. Examination of the proerties and resin contents of commerical MDF and PB
Modelling the rotary drum blending process in the manufacuring of OSB and OSL using discrete element modelling

Professional Affiliations

Forest Products Society FPS
Society of Wood Science and Technology

Current Graduate Students

Shayesteh Haghdan, PhD
Solace Sam-Brew, PhD
Ying-Li (Ingrid) Tsai, PhD
Diyan Xian, MASc
Jörn Dettmer, MASc

Current Courses

Winter 2017

WOOD241 Programming for Wood Products Manufacturing Applications Sections

Practical computer and problem solving cases taken from wood products manufacturing industrial applications.

Winter 2017

WOOD244 Quantitative Methods in the Wood Industry Sections

Solving practical problems in the wood industry using computer-based mathematical tools including spreadsheets, visual basic programming and relational database systems.

Winter 2017

WOOD487 Wood Composites Sections

Physical, chemical and mechanical variables involved in adhesive bonding of composite wood products; characteristics of adhesives; plywood, composite wood panels, hardboard, medium density fibreboard, laminated wood and engineered lumber composites manufacturing processes; important physical and chemical properties of products.

Winter 2017

FRST232 Computer Applications in Forestry Sections

Techniques involved in solving forestry problems with microcomputers using word processing, spreadsheet, procedural language, and database management tools.

Winter 2017

WOOD245 Programming for Wood Products Manufacturing Applications Sections

Practical computer and problem solving cases taken from wood products manufacturing industrial applications.

Selected Publications


Dixon, PG, S. Malek, KE Semple, PK Zhang, GD Smith, LJ Gibson (2017). Multiscale modelling of Moso bamboo oriented strand board BioRescouses 12(2), 3166-3181
Lui, X GD Smith Z. Jiang MCD Bock F. Boeck O Frith A Gatóo K Liu H Mulligan KE Semple B Sharma M Ramage. (2016). Nomenclature for Engineered Bamboo BioResources 11(1) 1141-1161 BioResources 11(1) 1141-1161
Dixon, PG Semple KE Kutnar A Kamke FA Smith GD Gibson LJ (2016). Comparison of the flexural behavior of natural and thermo-hydro-mechanically densified Moso bamboo European Journal of Wood and Wood Products 74.5: 633–642. DOI 10.1007/s00107-015-0938-5
Dettmer, J Smith, GD (2015). Properties Comparison of North American Manufactured Particleboard and Medium Density Fiberboard – Part I: Particleboard BioResources 10(3) 6032-6043. BioResources 10(3) 6032-6043.
Dettmer, J Smith, GD (2015). Properties Comparison of North American Produced Particleboard and Medium Density Fiberboard – Part II: Medium Density Fiberboard BioResources 10(3) 6032-6043 BioResources 10(3) 6032-6043
Haghdan, S. S. Renneckar G.D. Smith (2015). Sources of Lignin Elsevier, Oxford, United Kingdom In O. Faruk & M. Sain (Eds.), Lignin-based Polymer Composites, 1st Edition., Elsevier, Oxford, United Kingdom, pp. 1-11.
Shayesteh Haghdan Gregory D Smith (2015). Natural fiber Reinforced Polyester Composites: A Literature Review Journal of Reinforced Plastics and Composites Journal of Reinforced Plastics and Composites, Published Online: DOI: 10.1177/0731684415588938, Vol 34(14). 1179-1190.
Haghdan, S T. Tannert G.D. Smith (2015). Wettability and Impact Performance of Wood Veneer/Polyester Composites BioResources, Vol 10(3) 5633—5654 BioResources, Vol 10(3) 5633-5654
K. E. Semple D. Vnučec A. Kutnar F. A. Kamke M. Mikuljan G. D. Smith (2015). Bonding of THM modified Moso bamboo (Phyllostachys pubescens Mazel) using modified soybean protein isolate (SPI) based adhesives Springer Berlin Heidelberg Eur. J. Wood Prod. 73:781–792
Semple, K.E. P.K. Zhang GD Smith (2015). Stranding Moso and Guadua Bamboo. Part II. Strand Surface Roughness and Classification Bioresources, 10(3) 4599-4612. Bioresources, 10(3) 4599-4612.
Semple, K.E. P.K. Zhang, GD Smith (2015). Stranding Moso and Guadua Bamboo. Part I. Strand Production and Size Classification BioResources 10(3) 4048-4064. BioResources 10(3) 4048-4064.
Haghdan S, Tannert T, Smith G. (2015). Effects of Reinforcement Configuration and Densification on Impact Strength of Wood Veneer/Polyester Composites Journal of Composite Materials Journal of Composite Materials 49 (10): 1161-1170
Semple, K.E., Sam-Brew, S., Deng, J., Cote, F., Chen, Z., Yan, N. and Smith, G.D. (2015). Properties of commercial Kraft paper honeycomb furniture stock panels conditioned under 65% and 95% relative humidity Forest Products Journal Volume 65 Issue 3/4 June 2015
Haghdan, S; GD Smith (2015). Fracture Mechanisms of Wood/Polyester Laminates under Quasi-Static Compression and Shear Loading Composites Part A Composites Part A, Vol 74 (July) 114-122.
Semple, K; M Smola; K Zhang; GD Smith (2015). Hybrid Oriented Strand Boards made from Moso bamboo (Phyllostachys pubescens Mazel) and Aspen (Populus tremuloides Michx.) Part I: Uniformly mixed single layer uni-directional boards European Journal of Wood and Wood Products, Volume 73, Issue 4, pp 527-536 European Journal of Wood and Wood Products, Volume 73, Issue 4, pp 527-536
Semple, KE; PK Zhang; GD Smith (2015). Hybrid oriented strand boards made from Moso bamboo (Phyllostachys pubescens Mazel) and Aspen (Populus tremuloides Michx.) Part II: Species-separated three-layer boards Springer European Journal of Wood and Wood Products, Vol 73(July) pp 515-525.
Sambrew, S GD Smith (2015). Flax and Hemp fiber-reinforced particleboard Industrial Crops and Products Industrial Crops and Products, Volume 77, 23 December 2015, Pages 940–948
Semple, K; M Smola; J Hoffman; GD Smith (2014). Optimizing the stranding of Moso bamboo (Phyllostachys pubescens Mazel) culms using a CAE 6/36 disk flaker Proceedings of the 57th International Convention of Society of Wood Science and Technology, June 23-27, 2014, Zvolen, Slovakia, pp. 257-269.
Semple KE; GD Smith (2014). Theoretical models for bamboo strand recovery and width distribution Processing Technologies for the Forest and Biobased Products Industries PTF BPI 2014, eds A. Petutschnigg and M.C. Barbu (eds), 24-26 September 2014, Salzburg University of Applied Sciences, Kuchl, Austria, pp. 401-408.
Semple, K.E. Xian, D. Smith, G.D. (2014). Reinforced-core particleboard for improved fastener holding ability. Wood and Fiber Sience Wood and Fiber Science 46(1):48-64
Zheng Chen Ning Yan Solace Sam-Brew Greg Smith James Deng (2014). Investigation of mechanical properties of sandwich panels made of paper honeycomb core and wood composite skins by experimental testing and finite element (FE) modelling methods European Journal of Wood and Wood Products European Journal of Wood and Wood Products, 72(3):311-319.
Semple, KE, Kamke, FA Kutnar, A Smith, GD (2013). Exploratory thermal-hydro-mechanical modification (THM) of Moso bamboo (Phyllostachys pubescens Mazel) Proc. Joint COST Conference FP0904 and FP1006: Characterisation of modified wood in relation to wood bonding and coating performance, Ed S. Medved and A. Kutnar, 16-18 October 2013, Rogla, Slovenia, University of Ljubljana Biotechnical Faculty, Ljubljana, Slovenia. Pp. 220-227.
Semple, K.E. D. Xian G.D. Smith. (2013). Properties and Wood Bonding capacity of Nanoclay-modified UF and MF resins Society of Wood Science and Technology
Semple, KE Kamke FA Kutnar A Smith GD (2013). Characterisation of modified wood in relation to wood bonding and coating performance In Proc. Joint COST Conference FP0904 and FP1006: Characterisation of modified wood in relation to wood bonding and coating performance, Ed S. Medved and A. Kutnar, 16-18 Oct, Rogla, Slovenia, University of Ljubljana Biotechnical Faculty, Ljubljana, Slovenia. pp. 220-227 In Proc. Joint COST Conference FP0904 and FP1006: Characterisation of modified wood in relation to wood bonding and coating performance, Ed S. Medved and A. Kutnar, 16-18 Oct, Rogla, Slovenia, University of Ljubljana Biotechnical Faculty, Ljubljana, Slovenia. pp. 220-227
Chen, Z. Yan, N. Smith, G. D. Deng, J. (2012). Investigation of Flexural Creep of Kraft Paper Honeycomb Core Sandwich Panels Using the Finite Element Method (FEA) Wood and Fiber Science 44(4)1-10 Wood and Fiber Science 44(4)1-10
Z. Chen, N. Yan, J. Deng, G.D. Smith. (2011). Flexural creep behavior of sandwich panels containing Kraft paper honeycomb core and wood composite skins Materials Science and Engineering: A Volume 528, Issues 16-17, 25 June 2011, Pages 5621-5626. Materials Science and Engineering: A Volume 528, Issues 16-17, 25 June 2011, Pages 5621-5626.
Zhou, C.; C. Dai; G.D. Smith. (2011). Modeling vertical density profile formation for strand-based wood composites during hot pressing: Part 2. Experimental investigations and model validation Composites Part B: Engineering 42(6)1357–1365 Composites Part B: Engineering 42(6)1357–1365
E.K. Sackey, C. Zhang, Y.-L Tsai, A. Prats, G.D. Smith (2011). Feasibility of a New Hybrid Wood Composite Comprised of Wood Particles and Strands Wood and Fiber Science 43(1) 1-10 Wood and Fiber Science 43(1) 1-10
Zhou, C. Dai, C. Smith, G.D (2011). Modeling vertical density profile formation in strand-based wood composites during hot pressing: Part 1. Model development Composites – Part B – Engineering 42(6)1350-1356 Composites – Part B – Engineering 42(6)1350-1356
C. Zhang and G.D. Smith (2010). Effects of Nanoclay addition to Phenol-Formaldehyde Resin on the Permeability of Oriented Strand Lumber Wood and Fiber Science, 42(4), 2010, pp. 553-555
Sackey, E.K. and G.D. Smith (2010). Characterizing macro-voids of uncompressed mats and finished particleboard panels using response surface methodology and X-ray CT Walter de Gruyter Holzforschng, Vol 64, pp. 343-352, 2010. DOI 10.1515/HF.2010.052
Zhang, C. Smith, G.D. (2010). In-Plane Permeability of Oriented Strand Lumber. Part II: Microscopic Investigation of Void Structure During Compression Society of Wood Science and Technology Wood and Fiber Science 42(2) pp. 121-129
Zhang C Smith GD (2010). In-Plane Permeability of Oriented Strand Lumber, Part I: The Effects of Mat Density and Flow Direction -Society of Wood Science and Technology -Wood and Fiber Science 42(1)99-106
Sam-Brew, S. K. Semple G.D. Smith (2010). Edge Reinforcement of Honeycomb Sandwich Panels Forest Products Journal 60(4): 382-389. Forest Products Journal 60(4): 382-389.
Zhou C Dai C Smith GD (2010). Viscoelasticity of aspen wood strands during hot pressing: experimentation and modeling Holzforschung 64(6)713-723 Holzforschung 64(6)713-723
Zhou, C Smith, GD Dai, C (2009). Characterizing hydro-thermal compression behavior of aspen wood strands Holzforschung 63(5)609-617. Holzforschung 63(5)609-617.
Fang, Z. Ruddick, J.N.R. Smith, G.D. (2009). Selected Wood Preservatives for use with OSB. Part 2: Mechanical Properties of Boards. JIWS 18(2)75-81
Cheng Zhou Gregory D. Smith Chunping Dai (2009). Characterizing hydro-thermal compression behavior of aspen wood strands -Walter de Gruyter -Holzforschung 63(5):609–617.
Sackey, E., G.D. Smith (2009). Empirical Distribution Models for Slenderness and Aspect Ratios if Core Particles of Particulate Wood Composites. Wood and Fiber Science 41(3)255- 266.
Sackey, E., G.D. Smith. (2009). Empirical Distribution Models for Slenderness and Aspect Ratios if Core Particles of Particulate Wood Composites Wood and Fiber Science 41(3)255- 266
Zhou, C., Dai, C., Smith, G.D. (2008). A generalized mat consolidation model for wood composites Holzforschung, 62(2) pp. 201-208.
A. Oudjehane J. Wang C. Zhang G.D. Smith F. Lam (2008). Development of thick strand-based mountain pine beetle wood composites: Duration of load and permeability analyses -BC Journal of Ecosytems and Management , 9(3) 2008, 178-180.
Sackey, E.K., Semple, K.E., Oh, S.-W., Smith, G.D. (2008). Improving Core Bond Strength of Particleboard through Particle Size Redistribution. Society of Wood Science and Technology Wood and Fiber Science 40(2):214-224
Semple, K. E., Vaillant, M.-H., Kang, K.-Y., Oh, S. W., Smith, G. D., Mansfield, S. D. (2007). Evaluating the suitability of hybrid poplar clones for the manufacture of oriented strand boards. Holzforschung, 61(4):430-438
Fang, Z, J.R. Ruddick and G. Smith (2006). Use of a formulated wood preservative (K-HDO and fenpropimorph) to enhance the durability of PF resin bonded waferboard. JIWS 17(4)216-222
Fang, Z., J.N.R. Ruddick and G.D. Smith (2006). Evaluating wood preservatives fror use with OSB, Part 1: Compatibility with typical resin systems. Journal of the Institute of Wood Science 17(4)216-222
H.J. Park, K. Semple, and G.D. (2006). Screw thread shape and fastener type effects on load capacities of screw-based particlebaord joints in case construction Forest Products Journal, 56(4):48-55
Fakhri, H.R., K. Semple, and G.D. Smith. (2006). Permeability of OSB. Part I. The effects of core fines content and mat density on transverse permeability Wood and Fiber Science 38 (3): 450-462 JUL 2006
Fakhri, H.R. and G.D. Smith (2006). Transverse Permeability of OSB. Part II. Modeling the effects of density and core fines content Wood and Fiber Science 38(3), pp. 463-473
Semple, K., E. Sackey, H. Fakhri, T. McConchie, and G.D. Smith (2006). Effect of Extended Mat Open Assembly Time on Properties of OSB Bonded with pMDI Wood and Fiber Science 38(3) pp. 546-552
Semple, K. and G.D. Smith (2005). Prediction of Internal Bond Strength in Particleboard from Screw Withdrawl Resistance Models Wood and Fiber Science 38(2) pp. 256-267
Smith, GD (2005). The lap-shear strength of bonds between Oriented Strand Board (OSB) like strands coated with pMDI resin Holz als Roh- und Werkstoff 53(4):311-12
Smith, G.D. (2005). Direct Observation of the Tumbling of OSB Strands in an Industrial Scale Coil Blender Wood and Fiber Science 37(1):147–159
Semple, K., E. Sackey, H.J. Park, and G.D. Smith (2005). Properties variation study of furniture grade M2 particleboard manufactured in Canada Forest Products Journal, 55(12):117-125
Semple, K., E. Sackey, H.J. Park, and G.D. Smith. (2005). Properties comparison of furniture grade MS and M2 particleboard products manufactured in Canada. Forest Products Journal 55(12):125–131.
Smith, G.D. (2004). A laboratory technique for coating strands with resin droplets of controlled size and spacing Forest Products Journal 53(7/8):70-76.
Conrad, M.P.C., G. Fernlund, and G.D. Smith (2004). Fracture Toughness of Wood-Adhesive Bonds Proceedings of the Fourth Canadian-International Composites Conference, Ottawa, Ont. August 19-22, 2003. pp. 11.
Conrad, M.P.C., G.D. Smith, G. Fernlund (2004). Fracture of wood composites and wood-adhesive joints: A comparative review Wood and Fiber Science 36(1) 2004 pp.26-39
Smith, G.D. (2004). The effect of some process variables on the lap-shear strength of aspen strands uniformly coated with pMDI-resin Wood and Fiber Science 36(2) 2004, pp. 228–238.
Conrad, M.P.C., G.D. Smith, G. Fernlund (2003). Fracture of solid wood: A review of structure and properties at different length scales Wood and Fiber Science 35(4), 2003, pp. 570-584
Conrad, M.P.C., G.D. Smith, G. Fernlund (2003). Fracture of discontinuos wood-adhesive bonds International Journal of Adhesion and Adhesives, 23 (2003) 39-47
Smith, G.D. (2003). The lap-shear strength of droplets arrays of a PF-resin on OSB strands Forest Products Journal 53 (11/12) 2003: 1-7
Plummer. C.J.G, P.-E. Bourban, J.-E. Zanetto, G.D. Smith, J.-A. E. Manson (2003). Nonisothermal Fusions Bonding in Semicrystalline Thermoplastics Journal of Applied Polymer Science, 87:1267-1276
Smith, G.D. Plummer, C.J.G. Bourban, P.-E. Manson, J.-A.E. (2001). Non-isothermal fusion bonding of polypropylene Polymer 42 (2001):6247-6257
Bidaux, J.E., G.D. Smith, J.-A.E. Månson and C.J.G. Plummer. (1998). Fusion bonding of maleic anhydride grafted polypropylene-polyamide 6 blends to polyamide 6 Polymer 39 (1998):5939-5948
Bidaux, J.E., G.D. Smith, N. Bernet, J. Hilborn and J.-A.E. Månson. (1996). Fusion Bonding of Maleic Anhydride Grafted Polypropylene to Polyamide 6 via In Situ Block Copolymer Formation at the Interface Polymer 37 (1996):1129-1136.
Smith, G.D. and A. Poursartip (1993). A comparison of two resin flow models for laminate processing Journal of Composite Materials 27: 1696–1711.