31 citations · 36 across the 3 of their papers we have counts for
9 papers
The role of water in the behavior of wood
Dominique Derome, Ahmad Rafsanjani, Stefan Hering +7
Wood, due to its biological origin, has the capacity to interact with water. Sorption/desorption of moisture is accompanied with swelling/shrinkage and softening/hardening of its s…
Full-field moisture induced deformation in Norway spruce: intra-ring variation of transverse swelling
Christian Lanvermann, Falk K. Wittel, Peter Niemz
The transverse hygro-expansion of the Norway spruce wood is studied on the growth ring level using digital image correlation. This non-destructive technique offers the possibility…
Mechanical Properties of Norway Spruce: Intra-Ring Variation and Generic Behavior of Earlywood and Latewood until Failure
Christian Lanvermann, Philipp Hass, Falk K. Wittel +1
The alternating earlywood and latewood growth ring structure has a strong influence on the mechanical performance of Norway spruce. In the current study, tensile tests in the longi…
Generic failure mechanisms in adhesive bonds
Philipp Hass, Falk K. Wittel, Peter Niemz
The failure of adhesive bondlines has been studied at the microscopic level via tensile tests. Stable crack propagation could be generated by means of samples with improved geometr…
Pore space analysis of beech wood: the vessel network
Philipp Hass, Falk K. Wittel, S. A. McDonald +4
Water transport in wood is vital for the survival of trees. With synchrotron radiation X-ray tomographic microscopy (SRXTM), it becomes possible to characterize and quantify the 3D…
Inverse determination of effective mechanical properties of adhesive bondlines
Philipp Hass, Falk K. Wittel, Miller Mendoza +2
A new approach for determining effective mechanical bondline properties using a combined experimental-numerical modal analysis technique is proposed. After characterizing clear spr…
Moisture-induced Damage Evolution in Laminated Beech
Mohammad Masoud Hassani, Falk K. Wittel, Samuel Ammann +2
Structural elements made of laminated hardwood are increasingly used in timber engineering. In this combined numerical and experimental approach, damage onset and propagation in un…
Adhesive Penetration in Beech Wood Part I: Experiments
P. Hass, F. K. Wittel, M. Mendoza +2
A study with synchrotron radiation X-ray tomographic microscopy (SRXTM) of PUR, PVAC, and UF adhesive bond lines in beech wood, bonded under various growth ring angles is presented…
Adhesive penetration in Beech wood Part II: Penetration Model
M. Mendoza, P. Hass, F. K. Wittel +2
We propose an analytical model to predict the adhesives penetration into hard wood. Penetration of hard wood is dominated by the vessel network which prohibits porous medium approx…