Experimental study into compression after impact strength of laminates with conventional and nonconventional ply orientations

Experimental study into compression after impact strength of laminates with conventional and nonconventional ply orientations

 

A new publication from the AMADE members Yi Liv et al. has appeared in the October issue of Composites Part B. The contribution “Experimental study into compression after impact strength of laminates with conventional and nonconventional ply orientations” makes an assessment of the advantage of non-conventional laminates that reduce the mismatch angle between reinforcements. The strategy is to have a central sublaminate where delaminations are less likely to occur than in the bottom and the top one. Specimens have been tested with LVI and CAI, including moisture conditions.

 

Paper information

Title Experimental study into compression after impact strength of laminates with conventional and nonconventional ply orientations
Authors: Yi Liv, G. Guillamet, J. Costa, E.V. González, L. Marín, J.A. Mayugo
Journal, Volume, Page, Year: Composite Part B, 126, pp. 133-142, 2017
DOI:

htts://doi.org/10.1016/j.compositesb.2017.05.074

 

Highlights

  • The compression after impact (CAI) strength is fundamentally impaired by impact-induced delaminations.
  • This study predetermines the locations of delaminations by selecting proper mismatch angles between plies.
  • Damage inspection confirms the success of the predetermination method.
  • At high impact energy, the nonconventional layup retains CAI strengths more efficiently.
  • Blocking three plies is detrimental to both impact damage resistance and tolerance.
  • Moisture is harmful for the pristine laminates but has diverse influences on the impacted ones.

 

Project and Finding

  • Relevant projects: “Multidirectional Damage Tolerance Composites (MuDaTCom)”.
  • Funding institutions: MAT2015-69491-C3-1-R (MINECO/FEDER, UE) and FI-DGR pre-doctoral grant (2015FI-B1 00144).