Experimental evaluation of cutting forces for chipping process and development of wood material model: 2016 World Conference on Timber Engineering, WCTE 2016

Philip Pichler, Martin Leitner, Florian Grün, Christoph Guster

Research output: Other contribution

Abstract

The aim of the study is to evaluate a predictive model for cutting forces during wood machining, which can be applied and enhanced by means of explicit Finite Element Analysis (FEA). For the experimental characterization, a miniature cutting machine is designed and the acting forces during the chipping process are measured. Thereby, the specific geometry of the implemented knife holder serves as a defined bending beam and by the aid of applied strain gauges a recalculation to the force in the main cutting direction is feasible. By variation of wood species, alignment of growth rings and tool rake angles, the context of cutting depth and the occurred load is investigated. In addition, a relatively high sampling rate ensures that the highly dynamic forces of the whole cutting process are recorded properly and are applicable for a validation with a numerical ABAQUS explicit simulation incorporating a material model of spruce, described by a ductile material with damage criterion. The results exhibit a good correlation between computed and experimental measured loads, whereat element damage and deletion corresponds on similar load levels.
Original languageEnglish
PublisherTU-Verlag, Technische Universität Wien
Publication statusPublished - 2016
Externally publishedYes

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