This Symposium was organized by IBOIS - Chair of Timber Construction of the Swiss Federal Institute of Technology in Lausanne, with Prof. Jean Luc Sandoz, Chairman, as a member of the International Committee, in collaboration with:
Prof. Roy Pellerin, Honorary Chairman, Washington State University (Pullmann WA, U.S.A.)
and with the help of the following National Delegates:
Prof. Frank C. Beall (Richmond CA, U.S.A.)
Prof. Kent McDonald, Forest Products Laboratory (Madison Wl, U.S.A.)
Prof. Friedrich-Wilhelm Bröker, Federal Research Centre for Forestry and Forest Products (Hamburg) Germany
Prof. Rolf Birkeland (Aas, NORWAY)
Dr. Peter Bonfield (Garston Wafford, UNITED KINGDOM)
Prof. Rolf Edward Booker (Rotorua, NEW ZEALAND)
Prof. Shi Bozhang (Nanjing, P.R. CHINA)
Prof. Bojan Bucar (Ljubliana, SLOVENIA)
Dr. Izak S. Burger (Pretoria, SOUTH AFRICA)
Prof. Ario Ceccotti (Firenze, ITALY)
Dr. Alain Charlebois (Sainte-Foy, Quebec, CANADA)
Prof. Helena Cruz (Lisboa, PORTUGAL)
Prof. Ioan Curtu (Brasov, ROMANIA)
Dr. Ferenc Divos (Sopron, HUNGARY)
Prof. Jan Dubovsky (Zvolen, SLOVAK REP.)
Prof. Witold Stanislaw Dzbenski (Warsaw, POLAND)
Dr. Antonio Gutierrez Oliva (Madrid, SPAIN)
Prof. Preben Hoffmeyer (Lyngby, DENMARK)
Prof. Sumire Kawamoto (Danchi-Nai Ibaraki, JAPAN)
Prof. Robert H. Leicester (Highest Victoria, AUSTRALIA)
Dr. Ad. J. M. Leijten (Delft, NETHERLANDS)
Dr. Owe Lindgren (Skelieftea, SWEDEN)
Prof. Pierre Morlier (Cestas Gazinet, FRANCE)
Prof. Peter Niemz (Valdivia, CHILE)
Prof. Jose Nivaldo Garcia (Piracicaba, SP / BRASIL)
Dr. Valez Picardo (Dublin, IRELAND)
Alpo Ranta-Maunus (Espoo, FINLAND)
Prof. Guillermo Riesco Mudoz (Lugo, SPAIN)
Dr. Robert J. Ross (Madison Wl, U.S.A.)
Mr van Lemput (Brussels, BELGIUM)
Dr. Manfred Vanek (Wien, AUSTRIA)
First, more than ever in the past, wood is now a material for the future. It corresponds to all the criteria defined at the 1992 Rio Conference on Environment and Development for compliance with the conditions for sustainable development. In addition, after encountering apathy during the 20th century, the return of wood is now reinforced by the leverage effect of forest reserves accumulated in the Northern hemisphere. This in itself, and from an ecological point of view, necessitates an increase in the exploitation of forests. The use of wood is also beneficial from the point of view of energy, recycling, environmental effects and its potential for long-term production.
This 10th Symposium is also very important in the field of the communication of science. In its first edition in Europe the symposium has become decidedly international, especially through the desire of IBOIS to involve our colleagues from Eastern Europe, who are invited to come and take part in exchange and communication with the rest of the world. The symposium is also significant in its size: with more than 120 participants, 43 speakers and nearly 50 posters it is a crossroads for the exchange of various scientific results. This indicates the scientific importance of wood in the world and guarantees future progress based on present exchanges.
The proceedings of the symposium comprise all the scientific fields discussed during the plenary sessions of the symposium, with the first part dealing with the papers discussed after oral communication, and the second part covering the summaries of posters debated during the poster sessions.
As chairman of NDT'96, I should finally like to express my sincere gratitude towards the members of the program, to the International and National Delegates for their valuable advice and help, and to the publisher, PPUR. However, it is above all the scientific content which determines the value of such a publication for the professional community and I am therefore particularly grateful to the authors who made their research reports available. Special thanks to our colleagues from Eastern Europe for the effort which they made to attend this symposium, and to Professor Roy Pellerin who was involved in initiating the beginning symposia in the 1960's.
Lausanne, August 25, 1996
Jean Luc Sandoz
Conference Chairman
V. Morris, J. Adams
Using acoustic emission as a tool to study crack propagations
in wood-based panel products, pp13
S. Kawamoto
Detection of acoustic emissions associated with the drying of wood, pp23
F.C. Beall
The use of acoustic emission to assess duration of load behavior
in oriented strandboard, pp 33
E.C. Beldean, P. Pescaru
Research on the acoustic quality classes of resonance spruce wood
of Romania, pp 43
R.J. Rosa, D.W. Green, K.A. McDonald, K.C. Schad
NDE of logs with longitudinal stress waves , pp 117
R.W. Anthony, A.K. Pandey
Use of stress waves to evaluate timber pile length, pp 125
J.L. Sandoz
Ultrasonic solid wood evaluation in industrial applications, pp 147
I. Curtu, C. Roaca, M.C. Barbu, L.A. Curtu, R.L. Crisan
Research regarding the growth stress measurement in beech using
ultrasound technique, pp 155
M.P. Luong
Infrared thermography of damage in wood , pp 175
M. Tiitta, H. Olkkonen, T. Lappalainen, T. Kanko
Density measurement of particleboard, veneer and wood specimens
by narrow beam gamma absorption technique , pp 187
T.D. Faust, M. Tang, S. Bhandarkar, J.W. Smith, E.W. Tollner
Evaluation of growth related features in selected hardwood logs using
X-ray computed tomography and image analysis, pp 201
V. Bucur, S. Garroa, A. Navarrete, M.T. de Troya, R. Guyonnet
Kynetics of wood degradation by fungi with X-ray microdensitometric
technique, pp 209
E. Gierlik, W. Dzbenski
Wood densitometry based on the radiometric methods, pp 217
J.L. Sandoz, P. Lorin, C. Guilloux, O. Vanackere
New technologies of evaluation of in service wooden poles, pp 313
Toshinari Tanaka, Toshimi Tanaka, H. Nagao, H. Kato
A preliminary investigation on evaluation of strength of soft wood
timbers by neural network , pp 323
D. Choffel, P. Martin
Microwaves and vision device for mechanical grading, pp 331
M. Perstorper
Lengthwise variation in grading parameters and comparison with
bending strength tests, pp 341
S. Skatter, A.A. Dyrseth
Modal analysis of softwood logs by TV holography, pp 351
J. Dubovsky
Possibility of lumber quality evaluation from the aspect of some physical
characteristics, pp 363
A. Ceccotti, M. Togni
NDT on ancient timber beams: assessment of strength/stiffness
properties combining visual and instrumental methods, pp 379
N. Kuroda, Y. Suzuki
Possibility of treatability evaluation by electrical measurement of wood, pp 389
U. Kroppelin, K. Thielach
Experiences of the application of optical measuring methods to
characterize the elastic properties of wood and wood-based materials, pp 401
M. Kudela
Detection of stresses in wood by the reflection photoelasticity, pp 401
A. Labeda
Continuous measuring of sawn lumber surface roughness, pp 402
E. Rajcan, M. Sedliak, S. Urgelo
Acoustical and optical study of resonant spruce wood, pp 402
K. Sato, H. Matsuo, Y. Suzuki, S. Murase
Development of plywood grader using acoustic emission technique, pp 403
S. Vurpillot, D. Inaudi, J.L. Sandoz, P.K. Rastogi
Deformation measurements in wood structures using fiber optics
and holographic interferometry, pp 403
Y.R. Kim, S. Chen, B. Kasal, S.R. Auger
Condition assessment of an underwater timber gate using disperse
wave propagation analysis, pp 404
P. Niemz, L.J. Kucera, H. Pobleto, E. Baradit
On the application of sound velocity to determine bending strength and
module of elasticity of particleboards, pp 404
R.J. Ross, R.C. DeGroot, L.A. Soltla, K.A. McDonald
Application of stress wave nondestructive evaluation to historic structures .
R.J. Ross, R.C. DeGroot, W.J. Nelson
Nondestructive assessment of the strength of biologically degraded
wood, pp 405
J. Combe, F. Giudicl, J.L. Sandoz
Detection of ring shake in chestnut by ultrasonic measurement, pp 406
R.J. Ross, J.J. Fuller, J.R. Dramm, B.R. Brashaw
Ultrasonic NDE of wetwood and honeycomb in red oak lumber, pp 406
F.E. Feeney, V. Lawlor, J.A. Evertsen
An ultrasonic analogue to gamma ray densitometry of Medium Density
Fibreboard (M.D.F.) , pp 407
S. Grundberg, O. Lindgren, A. Groniung
The development of an X-ray based scanner for log grading at full
production speed, pp 407
M. Kölbel
Application of computerized tomography to old beeches in forest
reserves of bavaria, pp 408
H. Lindberg, J. Grahn, O. Lindgren, A.-C.Heligren
Water diffusion through acrylate latex paint films measured by
computed tomography, pp 408
W. Olek, H. M. Baranowska, R. Guzenda
On possible application of MR imaging to investigation of water transfer
in wood, pp 408
P. Wilberg
CT-scanning during wood drying for non-destructive moisture content gradient
evaluation, pp 409
B. Wolter, U. Notzelmann
Nondestructive testing of wood using a single sided nuclear magnetic
resonance, pp 409
S. Casagrande, J.J. Thomas
Damage measurement of wooden beams through tests, pp 410
A. Rattaj
Tuning of finite element models of soundboards by the results of
experimental modal analysis, pp 410
H. Balileres, P. Cassan Grading of French Guyana structural timber- Comparison of three different non-destructive methods: visual, ultrasound, modal analysis, pp 411
I. Curtu, F. Sperchez, P. Iordache, C. Rosca, A.L. Curtu Researches concerning stress-strain state in oar and skiff paddle, pp 411
I. Curtu, R. Crlsan, A.V. Popa, C. Rosca, M.C. Barbu, A.L. Curtu Static and dynamic stress measurements of woodchair structures using resistive tensometry, pp 412
F. Divos, L. Nemeth, B. Zombori Evaluation of historical wooden structures, pp 412
X. Honglin Study on increase regularity of free radicals induced by radiation in wood, pp 413
G. Janin, L. Poirot, F. Duccif, J.-F. Mazet, J.-L. Flot,
B. Charriere, J. Mosedale, J. Goncalez, R. Zanuttini, E. Sevrin,
M. Azzouxi, L. Barrouch, M. El Rhazi, P. Koukos, J. P. Bouillet,
J. P. Laclau, and Y. Nishinoy
The measurement of wood colour using increment cores in forestry,
genetic and technological studies, pp 413
B. Kasal
Use of cylindrical specimens to evaluate the strength of in-situ wood
structures, pp 413
V.D. Maioroscu, I. Curtu, M. Munteanu
Contributions to the optimization of finger joints by means of the new
non-destructive methods, pp 414
M. Marchal
Evaluation of beechwood quality by means of 3 NDT methods, pp 414
O. Moarcas, H. Mansfield-Williams, M. Irie
Modelling the effects of concentrated loads on chipboard floors, pp 414
M. Schulte, A. Frühwald
Strength grading of coconut timber (cocos nucifera L.) - comparison of
different grading methods, pp 415
C. Sigrist
Mechanical property evaluation techniques: grading and connecting
timber for high capacity nailed joints, pp 416
M.C. Timar, M.D. Mihai, S. Zamlira, D. Lica, V. Petrovici
Testing methods for chemically modified wood, pp 416
R. Crisan, A. Popa, L. Curtu, C. Rosca, D. Tomoioaga, A.L. Curtu
Aspects about stress distribution on roof structure of wooden churches
from "Maramuresh" area (North of Romania) built in the 18th century, pp 417
M. Darie, S. Cracoa, R. Vacareanu
The determination of stress states in existing wood buildings of
Bucharest by using non-destructive testing, pp 418
F. Rinn
Nondestructive inspection of building timber with resistograph micro
drillings, pp 418
A. Serbu, F. Sperchez
Aspects about stress development in pine wood strength structures of
Iye preparation tower in a paper factory, pp 419
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