Requirements for a model that exhibits mechano-sorptive behaviour

Grossman, Pinhas

doi:10.1007/bf00355737

Cited by 136 publications

(44 citation statements)

References 17 publications

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“…The deformation is in several publications described as slippage between the microfibrils (Balashov et al 1957;Olsson and Salmén 2004;Engelund and Svensson 2011). This slippage is facilitated by breaking and re-bonding of hydrogen bonds (Grossman 1976), a process that makes the deformations timedependent (Hunt and Gril 1996;Hanhijärvi and Hunt 1998) and assures stress relaxation. Even though Barkas did not consider time-dependent behaviour, the analogy still holds.…”

Section: Hygro-expansion and Sorption Hysteresismentioning

confidence: 99%

A critical discussion of the physics of wood–water interactions

et al. 2012

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This paper reviews recent findings on wood-water interaction and puts them into context of established knowledge in the field. Several new findings challenge prevalent theories and are critically discussed in an attempt to advance current knowledge and highlight gaps. The focus of this review is put on water in the broadest concept of wood products, that is, the living tree is not considered. Moreover, the review covers the basic wood-water relation, states and transitions. Secondary effects such as the ability of water to alter physical properties of wood are only discussed in cases where there is an influence on state and/or transition.

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Section: Hygro-expansion and Sorption Hysteresismentioning

confidence: 99%

A critical discussion of the physics of wood–water interactions

et al. 2012

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“…Much work has been done on the subject since the early 1960s (Armstrong and Kingston, 1960). A review of work was given by Grossman (1976), Morlier (1994), and Hunt (1999). The phenomenon called "Mechanosorption" has a chemical origin partially linked to the behavior of molecular bonds but the real mechanism is not yet well established.…”

Section: Introductionmentioning

confidence: 99%

Creep in Wood Under Variable Climate Conditions: Numerical Modeling and Experimental Validation

Dubois

Randriambololona

Petit

2005

Mech Time-Depend Mater

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Abstract. This paper deals with the modeling of linear viscoelastic behavior and strain accumulation (accelerated creep) during moisture content changes in timber. A generalized Kelvin-Voigt model is used and associated in series with a shrinkage-swelling element depending on the mechanical and moisture content states of materials. The hygrothermal aging due to climatic variations implies an evolution of rheological parameters depending upon moisture content and temperature. Two distinct viscoelastic laws, one for drying and the other for moistening, are coupled according to the thermodynamic principles when wood is subjected to nonmonotonous moisture variations. An incremental formulation of behavior is established in the finite element program CAST3M (Software developed by C.E.A. (Commissariatá l'Energi Atomique) and an experimental validation from tension creeprecovery tests is presented.

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“…Numerous mathematical models have been proposed over the last decades regarding this behaviour. The proposed models aim to fulfill many requirements listed by Grossman (1976). In spite of this, the determination of the model parameters from experimental results remains a serious Universidad del Bío -Bío challenge because of the coupled phenomena and the artifacts of the testing protocol (Muszynski et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Investigation of oscillating climates for wood drying using the flying wood test and loaded beams: need for a new mechano-sorptive model

Rémond

Cruz

Aléon

et al. 2013

Maderas, Cienc. tecnol.

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In this work, the effects of moisture content variations produced by oscillating drying conditions have been studied by means of non-symmetrical drying (flying wood) and loaded drying (3-point bending test). The oscillating conditions are intended to produce a mechano-sorptive creep that is able to reduce drying stresses. However, our experimental data seem to prove that the activation of the mechano-sorptive creep by oscillations of the moisture content is very limited. Besides, the simulations showed that noisy conditions due to the kiln regulation already activate the mechano-sorptive creep, even for non-oscillating conditions, and could confuse the results. Contrary to the experimental observations, the implementation of classical mechano-sorptive models in the drying simulation model is far too optimistic, which means that these models are not suitable when the material is submitted to numerous oscillations.

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Requirements for a model that exhibits mechano-sorptive behaviour

Cited by 136 publications

References 17 publications

A critical discussion of the physics of wood–water interactions

A critical discussion of the physics of wood–water interactions

Creep in Wood Under Variable Climate Conditions: Numerical Modeling and Experimental Validation

Investigation of oscillating climates for wood drying using the flying wood test and loaded beams: need for a new mechano-sorptive model

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