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SUMMARY:Compressive failure mechanisms in Composite Laminates with Dropped
  Plies - Dr Stuart Lemanski\, CUED
DTSTART:20120504T130000Z
DTEND:20120504T140000Z
UID:TALK37811@talks.cam.ac.uk
CONTACT:Ms Helen Gardner
DESCRIPTION:Composite structures exhibit many different failure mechanisms
 \, but attempts to model composite failure frequently make a prioriassumpt
 ions about the mechanism by which failure will occur. Compressive tests we
 re conducted at Bristol University on composite specimen manufactured with
  dropped plies which created wout-of-plane waviness defects. Significantly
  different failure mechanisms were observed for each case\, so detailed fi
 nite element models of these experiments were developed which included com
 peting failure mechanisms. The model predictions correlate well with exper
 imental results – both qualitatively (location of failure and shape of f
 ailed specimen) and quantitatively (failure load). The models are used to 
 identify the progression of failure during the compressive tests\, determi
 ne the critical failure mechanism for each configuration\, and investigate
  the effect of cohesive parameters upon specimen strength. This modelling 
 approach which includes multiple competing failure mechanisms can be appli
 ed to predict failure in situations where the failure mechanism is not kno
 wn in advance.
LOCATION:Oatley Seminar Room\, Department of Engineering
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