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Finite Element Simulation of Delamination Processes when Side Milling the Edges of Cross-Ply CFRP

Presentation held at 14th LS-DYNA Forum, 10-12 October 2016, Bamberg, Germany
 
: Vazquez Martinez, Hector; Esch, Philipp; Patel, Krunal

:
Präsentation urn:nbn:de:0011-n-4232290 (2.1 MByte PDF)
MD5 Fingerprint: 71acfdbb4b1519f869c2378ceb933250
Erstellt am: 25.11.2016


2016, 22 Folien
LS-DYNA Forum <14, 2016, Bamberg>
Englisch
Vortrag, Elektronische Publikation
Fraunhofer IPA ()
Fertigung; Zerspanung; Simulation; Qualitätsprüfung; Werkstoff; Leichtbau

Abstract
The present work describes the design of finite element models for the milling of unidirectional carbon-fiber-reinforced-polymer (CFRP) laminates in LS-Dyna. The machining models have been compared and evaluated with use of experimental tests. The CFRP behavior is defined through an equivalent homogenized model available in LS-Dyna. This material model uses Chang-Chang failure criteria, which is a modified version of the Hashin failure criterion. The model presents an acceptable response with respect to the stress distribution due to the loading conditions of milling. Delamination between the plies has been simulated but no surface delamination can be reproduced with the use of these models. Both experimental and simulation results show that the increase of the feed rate induces higher delamination levels on the CFRP laminate.

: http://publica.fraunhofer.de/dokumente/N-423229.html