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Rejection and Correction of the Fracture Mechanics Singularity Approach with its Associated Tree Modes of Crack Separation

van der Put, T.A.C.M. (author)

Limit Analysis is an prescribed exact approach of Wood Science, what is shown to also apply for wood Fracture Mechanics. Knowledge of the gradual elastic to plastic behavior and of the imitation by non-linear elasticity (and J-integral) is shown to be not needed. The linear – full plastic limit approach delivers an elastic lower bound, up to...

journal article 2018

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A new fracture mechanics theory of wood: Extended second edition

van der Put, T.A.C.M. (author)

book 2017

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Overview and extension of Annexes D, E, F, regarding structural failure citeria, stability and nailed particle board to wood joints

van der Put, T.A.C.M. (author)

The developed exact theory is given in the appended publications denoted by D, thus: D(1991), D(2008a), D(2008b), D(2010), D(2011), D(2012a) D(2012b) and primary, by the partly expired D(2006a), D(2006b). Other relevant derivations and applications are mentioned in these publications. The theory in all appended publications was derived by T.A.C...

book chapter 2015

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Comment on Mode II critical stress intensity factor of wood measured by the asymmetric four-point bending test of single-edge-notched specimen while considering an additional crack length, of H. Yoshihara in Holzforschung

van der Put, T.A.C.M. (author)

The results of the here discussed article of Yoshihara (2012), are unsatisfactory and need to be reconsidered. The existence of two critical stress intensities is postulated, which may differ a factor 3 to 4 from each other. A questionable push up of the lower data-curve, as given by Fig. 3 of Yoshihara (2012), may diminish this difference, but...

book chapter 2013

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Estimation of the influence of rows of nails in particle board-to-wood joints

van der Put, T.A.C.M. (author), Leijten, A.J.M. (author)

conference paper 2012

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Explanation of the strength of nailed particle board-to-wood joints

van der Put, T.A.C.M. (author), Leijten, A.J.M. (author)

By the earlier derived theory of the embedding strength, based on limit design, it is possible to explain the extremely high embedding strength of nailed particle board to wood joints leading to a new exact failure equation for the embedding strength as necessary correction for design and for the Codes.

conference paper 2012

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Derivation of the shear strength of continuous beams

van der Put, T.A.C.M. (author), van de Kuilen, J.W.G. (author)

The elastic—full plastic loading curve is for all materials sufficient to explain the strength of beams and beam columns loaded by bending and compression. This theory is extended for the influence of shear stress, and it is shown to be the only way to explain the combined bending-shear strength from test results. Also, the in the past derived...

journal article 2011

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A new theory of nucleation

van der Put, T.A.C.M. (author)

The classical nucleation and growth model is modified and it is shown that the concept of fluctuations, instability and surface energy is not needed and that (as applies for glass transition) nucleation is a common example of the kinetic theory of structural change processes, with a special driving force and a special property of the activation...

journal article 2011

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Theoretical derivation of the WLF- and annealing equations

van der Put, T.A.C.M. (author)

Based on the deformation kinetics approach, the theoretical derivation is given of the empirical WLF-equation of the time–temperature equivalence. The same is done for annealing at glass transition. The derivation provides a general theory for any loading history and replaces the inconsistent free volume model.

journal article 2010

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Explanation of the embedding strength of particle board

van der Put, T.A.C.M. (author)

By the earlier derived theory of the embedding strength, based on the equilibrium method of plasticity, it is possible to fully explain the empirical relations and test results of an investigation of the embedding strength of particle boards leading to a new insight for the right design rules.

journal article 2008

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Evaluation of perpendicular to grain failure of beams caused by concentrated loads of joints, V31 september 2000

van der Put, T.A.C.M. (author), Leijten, AJM (author)

report 2000

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A search for suitable coating materials on separator plates for molten carbonate fuel cells

Keijzer, M. (author), Hemmes, K. (author), van der Put, P. (author), Dewit, J.H.W. (author), Schoonman, J. (author)

journal article 1997

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Morphology control of thin LiCoO2 films fabricated using the electrostatic spray deposition (ESD) technique

Chen, C.H. (author), Kelder, E.M. (author), van der Put, P. (author), Schoonman, J. (author)

journal article 1996

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Adsorption and the Adhesion of Polymer Melts on Metal Surfaces

van der Put, A. (author)

doctoral thesis 1995

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CVD-grown boron phosphides: A thermodynamical adsorption model to understand the growth of different kinds of boron phosphides

Kelder, E.M. (author), van der Put, P. (author), Schoonman, J. (author)

book chapter 1994

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Chemical vapor deposition (CVD) provides special materials with exceptional properties

Schoonman, J. (author), van der Put, P. (author)

journal article 1993

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Discussion and proposal of a general failure criterion for wood

van der Put, T.A.C.M. (author)

Based on a polynomial expansion of the failure surface, a general failure criterion, satisfying equilibrium in all directions. was developed for wood long ago (IUFRO Borns 1982) and shown to apply for clear wood. For wood with (small) defects and (local) grain deviations, equivalent strengths can be defined in the main directions and a...

conference paper 1993

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Discussion of the failure criterion for combined bending and compression

van der Put, T.A.C.M. (author)

One of the conclusions of the stability group of CIB-Wl8A was that the Code must allow for analytical solutions for stability design based on quasi linear behaviour and must rever to these methods (p.e. to the Larsen-Theilgaard method for columns). Although a new parabolic failure criterion for bending with compression is proposed for the...

conference paper 1991

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CIB stability design proposal

van der Put, T.A.C.M. (author)

conference paper 1990

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Tension perpendicular to the grain at notches and joints

van der Put, T.A.C.M. (author)

conference paper 1990