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(Article of periodic en Anglais - 2013)

Document title

Mechanical resistance of coppice stems derived from full-scale impact tests

Authors(s) and Affiliation(s)

JANCKE O. (1) ; BERGER F. (1) ; DORREN L.K.A. (2) ;
(1) Irstea, UR EMGR, Saint-Martin-d'Hères, FRANCE
(2) Univ. of Natural Resources and Life Sciences, Vienna, AUTRICHE

Abstract

The aim is to supply data for more reliable assessments of the rockfall protective function of coppice forests with rockfall simulation models and to provide a basis for better estimating the rockfall protective effect of coppice clumps. The AA. assessed the mechanical resistance of 73 beech (Fagus sylvatica L.) coppice stems using an impact pendulum device. They found an exponential relationship between the stem diameter at breast height (DBH) and mechanical resistance (loss of momentum or kinetic energy of the impactor during impact). Moreover, the results show that the high flexibility of the stems leads to relatively long lasting impacts and only negligible damage at the point of impact on the stem. As a result, the mechanical resistance of the stems is partly determined by impactor velocity and mass. These findings question the practicality of defining mechanical resistance by means of the change of momentum or energy of the impactor

Source

Article of periodic

published at : Earth surface processes and landforms / ISSN 0197-9337 / CODEN ESPLDB

Editor : Wiley, Chichester - ROYAUME-UNI (1981)

Millesime : 2013, vol. 38, no9 [pp. 994-1003]

Bibliographic references : 1 p.

Collation : 12 fig., 2 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.3381

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2014
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