10.1515/hf-2020-0015
https://zenodo.org/records/3924404
oai:zenodo.org:3924404
1437-434X
Jaka Gašper Pečnik
Jaka Gašper Pečnik
Innorenew CoE, Izola, Slovenia, Livade 6, Izola, 6310, Slovenia; and Andrej Marušič Institute, University of Primorska, Koper, Slovenia
Andreja Kutnar
Andreja Kutnar
0000-0001-8366-6227
Innorenew CoE, Izola, Slovenia, Livade 6, Izola, 6310, Slovenia; Andrej Marušič Institute, University of Primorska, Koper, Slovenia
Holger Militz
Holger Militz
Wood Biology and Wood Products, University of Göttingen, Goettingen, Germany
Matthew Schwarzkopf
Matthew Schwarzkopf
Innorenew CoE, Izola, Slovenia, Livade 6, Izola, 6310, Slovenia; Andrej Marušič Institute, University of Primorska, Koper, Slovenia
Hannes Schwager
Hannes Schwager
Wood Biology and Wood Products, University of Göttingen, Goettingen, Germany
Fatigue behavior of beech and pine wood modified with low molecular weight phenol-formaldehyde resin
Zenodo
2020
beech
creep rate
fatigue strength
phenol formaldehyde
pine
stress level
wood modification
2020-06-29
https://zenodo.org/communities/innorenew
https://zenodo.org/communities/eu
Creative Commons Attribution 4.0 International
Modification of wood improves certain properties of natural wood and presents competitive alternatives to synthetic materials that may have larger environmental impacts. One aspect of modified wood that is currently not fully understood is the dynamic performance and how it is affected by the modification process. In this study, lowmolecular weight phenol formaldehyde (PF) resin was applied to Scots pine (Pinus sylvestris L.) and European beech (Fagus sylvatica L.) wood. The effect of this modification was evaluated using a three-point bending test undergoing cyclic loading. Compared to reference samples, modified wood showed higher static performance but revealed a reduction in cyclic fatigue strength (9% for pine and 14% for beech). Cyclic fatigue strength of unmodified wood was found to be 67% of the static modulus of rupture for both species. With PF resin modification, the fatigue strength dropped to 58% for pine and 53% for beech. While fatigue strength decreased, there was no reduction in cyclic modulus or change in the creep rate within the stationary creep phase. It is important to consider the reduction in fatigue strength when using PF modified wood for any construction purposes with expected cyclic loading conditions.
European Commission
10.13039/501100000780
739574
Renewable materials and healthy environments research and innovation centre of excellence