Remote laser cutting of CFRP: Influence of the edge quality on fatigue strength

Johannes W. Stock, Michael F. Zaeh, Justinian P. Spaeth

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

14 Scopus citations

Abstract

The additional weight of the batteries in electric cars can be compensated by using carbon fiber reinforced plastics (CFRP) for structural parts of the passenger cell. Various machining processes for CFRP are currently subject to investigations. Milling and abrasive waterjet cutting implicate fiber pull out or delamination and, thus, do not thoroughly meet the requirements for mass production. Despite this, laser beam cutting has a great potential in large scale cutting of CFRP and is a predominant research topic. Remote laser beam cutting especially provides a good cut surface quality. Currently, the correlation between cutting parameters and edge quality is not sufficiently known. In particular, studies on the dynamic strength of remote laser cut parts are missing. Therefore, fatigue testing was performed with specimens cut by laser radiation and the results were compared with others made by milling and abrasive waterjet cutting. With these experiments, a comparable study of the different methods of CFRP cutting was achieved. The influence of both the heat affected zone (HAZ) and of defects like micro-fissures on the fatigue strength were evaluated.

Original languageEnglish
Title of host publicationHigh-Power Laser Materials Processing
Subtitle of host publicationLasers, Beam Delivery, Diagnostics, and Applications III
PublisherSPIE
ISBN (Print)9780819498762
DOIs
StatePublished - 2014
EventHigh-Power Laser Materials Processing: Lasers, Beam Delivery, Diagnostics, and Applications III - San Francisco, CA, United States
Duration: 4 Feb 20146 Feb 2014

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8963
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceHigh-Power Laser Materials Processing: Lasers, Beam Delivery, Diagnostics, and Applications III
Country/TerritoryUnited States
CitySan Francisco, CA
Period4/02/146/02/14

Keywords

  • CFRP
  • cutting
  • fatigue testing
  • laser
  • milling
  • single mode
  • waterjet

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