Abstract
Profiled hollow core sandwich panels (SPs) and their components (outer layers and core) were manufactured with ponderosa and lodgepole pine wood strands to determine the effects of low-velocity impact forces and to observe their energy absorption (EA) capacities and failure modes. An instrumented drop weight impact system was applied and the tests were performed by releasing the impact head from 500 mm for all the specimens while the impactors (IMPs) were equipped with hemispherical and flat head cylindrical heads. SPs with cavities filled with a rigid foam insulation material (SPfoam) were also tested to understand the change in EA behavior and failure mode. Failure modes induced by both IMPs to SPs were found to be splitting, perforating, penetrating, core crushing and debonding between the core and the outer layers. SPfoams absorbed 26% more energy than unfilled SPs. SPfoams with urethane foam suffer less severe failure modes than SPs. SPs in a ridge-loading configuration absorbed more impact energy than those in a valley-loading configuration, especially when impacted by a hemispherical IMP. Based on the results, it is evident that sandwich structure is more efficient than a solid panel concerning impact energy absorption, primarily due to a larger elastic section modulus of the core’s corrugated geometry.
Acknowledgments
Our gratitude to the Centre for Advanced Composite Materials (CACM) at the University Of Auckland, New Zealand, for letting us use the impact testing equipment. The authors would also like to thank Mr. Jos Geurts of CACM for his help and guidance during the impact testing. This material is based upon work partially supported by the National Science Foundation under Grant No. CMMI-1150316 (Funder Id: 10.13039/100000147).
Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Research funding: None declared.
Employment or leadership: None declared.
Honorarium: None declared.
References
Atas, C., Sevim, C. (2010) On the impact response of sandwich composites with cores of balsa wood and PVC foam. Compos. Struct. 93:40–48.10.1016/j.compstruct.2010.06.018Suche in Google Scholar
Banerjee, S., Bhattacharyya, D. (2011) Optimal design of sandwich panels made of wood veneer hollow cores. Compos. Sci. Technol. 71:425–432.10.1016/j.compscitech.2010.12.011Suche in Google Scholar
Burnett, M., Kharazipour, A. (2018) Mechanical behaviour of a lightweight, three-layered sandwich panel based on the raw material maize. Holzforschung 72:65–70.10.1515/hf-2017-0028Suche in Google Scholar
Evci, C., Uyandıran, İ. (2017) The effect of the impactor diameter and temperature on low velocity impact behavior of CFRP laminates. In: AIP Conference Proceedings. AIP Publishing, College Park, MD. Vol. 1809, No. 1, p. 020014.10.1063/1.4975429Suche in Google Scholar
Hazizan, M.A., Cantwell, W.J. (2002) The low velocity impact response of foam-based sandwich structures. Compos. Part B 33:193–204.10.1016/S1359-8368(02)00009-4Suche in Google Scholar
Hunt, J.F., Winandy, J.E. (2003) 3D engineered fiberboard: engineering analysis of a new building product. Proc. EcoComp., Queen Mary, Univ. of London, London. pp. 1–8.Suche in Google Scholar
Imielińska, K., Guillaumat, L., Wojtyra, R., Castaings, M. (2008) Effects of manufacturing and face/core bonding on impact damage in glass/polyester-PVC foam core sandwich panels. Compos. Part B 39:1034–1041.10.1016/j.compositesb.2007.11.007Suche in Google Scholar
Li, J., Hunt, J.F., Gong, S., Cai, Z. (2016) Fatigue behavior of wood-fiber-based tri-axial engineered sandwich composite panels (ESCP). Holzforschung 70:567–575.10.1515/hf-2015-0091Suche in Google Scholar
Lim, T.S., Lee, C.S., Lee, D.G. (2004) Failure modes of foam core sandwich beams under static and impact loads. J. Compos. Mater. 38:1639–1662.10.1177/0021998304044760Suche in Google Scholar
McNatt, J.D., Soltis, L.A. (1990) Instrumented impactor for testing wood-base floor panels. J. Test. Eval. 18:265–273.10.1520/JTE12483JSuche in Google Scholar
Meyers, K.L. (2001) Impact of strand geometry and orientation on mechanical properties of strand composites. MS Thesis, Dept. of Civil and Env. Eng., Washington State University, WA, USA.Suche in Google Scholar
Mitrevski, T., Marshall, I.H., Thomson, R. (2006) The influence of impactor shape on the damage to composite laminates. Compos. Struct. 76:116–122.10.1016/j.compstruct.2006.06.017Suche in Google Scholar
Mohammadabadi, M., Yadama, V., Geng, J. (2018) Creep behavior of 3D core wood-strand sandwich panels. Holzforschung 72:513–519.10.1515/hf-2017-0088Suche in Google Scholar
Navarro, P., Marguet, S., Ferrero, J.F., Barrau, J.J., Lemaire, S. (2012) Modeling of impacts on sandwich structures. Mech. Adv. Mater. Struct. 19:523–529.10.1080/15376494.2011.556841Suche in Google Scholar
Qiao, P., Yang, M. (2007) Impact analysis of fiber reinforced polymer honeycomb composite sandwich beams. Compos. Part B 38:739–750.10.1016/j.compositesb.2006.07.014Suche in Google Scholar
Rao, S., Jayaraman, K., Bhattacharyya, D. (2011) Short fibre reinforced cores and their sandwich panels: processing and evaluation. Compos. Part A 42:1236–1246.10.1016/j.compositesa.2011.05.006Suche in Google Scholar
Rao, S., Jayaraman, K., Bhattacharyya, D. (2012) Micro and macro analysis of sisal fibre composites hollow core sandwich panels. Compos. Part B 43:2738–2745.10.1016/j.compositesb.2012.04.033Suche in Google Scholar
Schubel, P.M., Luo, J.J., Daniel, I.M. (2005) Low velocity impact behavior of composite sandwich panels. Compos. Part A 36:1389–1396.10.1016/j.compositesa.2004.11.014Suche in Google Scholar
Shalbafan, A., Lüdtke, J., Welling, J., Frühwald, A. (2013) Physiomechanical properties of ultra-lightweight foam core particleboard: different core densities. Holzforschung 67:169–175.10.1515/hf-2012-0058Suche in Google Scholar
Smardzewski, J. (2013) Elastic properties of cellular wood panels with hexagonal and auxetic cores. Holzforschung 67:87–92.10.1515/hf-2012-0055Suche in Google Scholar
Smardzewski, J., Jasińska, D. (2017) Mathematical models and experimental data for HDF based sandwich panels with dual corrugated lightweight core. Holzforschung 71:265–273.10.1515/hf-2016-0146Suche in Google Scholar
Torre, L., Kenny, J.M. (2000) Impact testing and simulation of composite sandwich structures for civil transportation. Compos. Struct. 50:257–267.10.1016/S0263-8223(00)00101-XSuche in Google Scholar
Voth, C.R. (2009) Lightweight sandwich panels using small-diameter timber wood-strands and recycled newsprint cores. MS Thesis, Dept. of Civil and Env. Eng., Washington State University, WA, USA.Suche in Google Scholar
Voth, C., White, N., Yadama, V., Cofer, W. (2015) Design and evaluation of thin-walled hollow-core wood-strand sandwich panels. J. Renew. Mater. 3:234–243.10.7569/JRM.2015.634109Suche in Google Scholar
Way, D., Sinha, A., Kamke, F.A., Fujii, J.S. (2016) Evaluation of a wood-strand molded core sandwich panel. J. Mater. Civ. Eng. 28:04016074.10.1061/(ASCE)MT.1943-5533.0001589Suche in Google Scholar
Weight, S.W., Yadama, V. (2008a) Manufacture of laminated strand veneer (LSV) composite. Part 1: Optimization and characterization of thin strand veneers. Holzforschung 62:718–724.10.1515/HF.2008.126Suche in Google Scholar
Weight, S.W., Yadama, V. (2008b) Manufacture of laminated strand veneer (LSV) composite. Part 2: Elastic and strength properties of laminate of thin strand veneers. Holzforschung 62:725–730.10.1515/HF.2008.127Suche in Google Scholar
White, N.B. (2011) Strategies to improve thermal and mechanical properties of wood composites. MS Thesis, Dept. of Civil and Env. Eng., Washington State University, WA, USA.Suche in Google Scholar
Winkel, J.D., Adams, D.F. (1985) Instrumented drop weight impact testing of cross-ply and fabric composites. Composites 16:268–278.10.1016/0010-4361(85)90279-4Suche in Google Scholar
©2018 Walter de Gruyter GmbH, Berlin/Boston
Artikel in diesem Heft
- Frontmatter
- Selected paper from the 19th ISWFPC - International Symposium on Wood, Fibre and Pulping Chemistry, held in Porto Seguro, Brazil, August 30–September 1
- Modeling kraft cooking kinetics of fiber mixes from TMP and unbleached kraft pulps for assessment of old corrugated cardboard delignification
- Effect of autohydrolysis on alkaline delignification of mixed hardwood chips and on lignin structure
- Lignin-based coatings for controlled P-release fertilizer consisting of granulated simple superphosphate
- A matrix-resistant HPTLC method to quantify monosaccharides in wood-based lignocellulose biorefinery streams
- Review
- Utilization and characterization of amino resins for the production of wood-based panels with emphasis on particleboards (PB) and medium density fibreboards (MDF). A review
- Original Articles
- Influence of veneer thickness, mat formation and resin content on some properties of novel poplar scrimbers
- Low-velocity impact response of wood-strand sandwich panels and their components
- Interactions between PLA, PE and wood flour: effects of compatibilizing agents and ionic liquids
- Industrial Thermowood® and Termovuoto thermal modification of two hardwoods from Mozambique
- Boron fixation effect of quaternary ammonium compounds (QACs) on sodium fluoroborate (NaBF4)-treated wood
Artikel in diesem Heft
- Frontmatter
- Selected paper from the 19th ISWFPC - International Symposium on Wood, Fibre and Pulping Chemistry, held in Porto Seguro, Brazil, August 30–September 1
- Modeling kraft cooking kinetics of fiber mixes from TMP and unbleached kraft pulps for assessment of old corrugated cardboard delignification
- Effect of autohydrolysis on alkaline delignification of mixed hardwood chips and on lignin structure
- Lignin-based coatings for controlled P-release fertilizer consisting of granulated simple superphosphate
- A matrix-resistant HPTLC method to quantify monosaccharides in wood-based lignocellulose biorefinery streams
- Review
- Utilization and characterization of amino resins for the production of wood-based panels with emphasis on particleboards (PB) and medium density fibreboards (MDF). A review
- Original Articles
- Influence of veneer thickness, mat formation and resin content on some properties of novel poplar scrimbers
- Low-velocity impact response of wood-strand sandwich panels and their components
- Interactions between PLA, PE and wood flour: effects of compatibilizing agents and ionic liquids
- Industrial Thermowood® and Termovuoto thermal modification of two hardwoods from Mozambique
- Boron fixation effect of quaternary ammonium compounds (QACs) on sodium fluoroborate (NaBF4)-treated wood