Compression testing of continuous fiber reinforced polymer composites with out-of-plane fiber waviness and circular notches

Abstract We investigated the face-stabilized Open-Hole Compression (OHC) test method for evaluating the effects of fiber waviness on the compression strength of continuous carbon fiber reinforced polymer composites. Temporal evaluations of the load-deformation response, acoustic emissions and optical microscopy are used to understand the failure modes and damage progression in the OHC specimen. The failure modes observed are structurally correlated to matrix failure and kink zone formation leading to fiber fracture. The results show how the resin pocket plays a more critical role than the layup in influencing the initiation of damage in the composite specimens.

[1]  Isaac M Daniel,et al.  Elastic properties of composites with fiber waviness , 1996 .

[2]  Isaac M Daniel,et al.  Effects of material and geometric nonlinearities on the tensile and compressive behavior of composite materials with fiber waviness , 2001 .

[3]  Isaac M Daniel,et al.  Nonlinear Elastic Behavior of Unidirectional Composites With Fiber Waviness Under Compressive Loading , 1996 .

[4]  Carl T. Herakovich,et al.  Mechanics of Fibrous Composites , 1997 .

[5]  I. Daniel,et al.  Nonlinear behavior of thick composites with uniform fiber waviness , 2000 .

[6]  K. Potter,et al.  Damage progression and defect sensitivity: An experimental study of representative wrinkles in tension , 2013 .

[7]  C. A. Berg,et al.  Fatigue of graphite fibre-reinforced epoxy in compression , 1973 .

[8]  Constantinos Soutis,et al.  Effect of off-axis ply orientation on 0°-fibre microbuckling , 1999 .

[9]  Constantinos Soutis,et al.  A study on the compressive strength of thick carbon fibre-epoxy laminates , 2007 .

[10]  Peng Yang,et al.  Fatigue and Impact Behaviour of Carbon Fibre Composite Bicycle Forks , 2012 .

[11]  Derek R. Petersen,et al.  Gaussian function characterization of unnotched tension behavior in a carbon/epoxy composite containing localized fiber waviness , 2011 .

[12]  A. Waas,et al.  Micromechanical modeling to determine the compressive strength and failure mode interaction of multidirectional laminates , 2013 .

[13]  Constantinos Soutis,et al.  Damage monitoring and analysis of composite laminates with an open hole and adhesively bonded repairs using digital image correlation , 2013 .

[14]  Michael R Wisnom,et al.  Variability, fibre waviness and misalignment in the determination of the properties of composite materials and structures , 2008 .

[15]  R. El-Hajjar,et al.  Modified average stress criterion for open hole tension strength in presence of localised wrinkling , 2012 .

[16]  Michael R Wisnom,et al.  Fibre Waviness Generation and Measurement and Its Effect on Compressive Strength , 2000 .

[17]  H. T. Hahn,et al.  Compression Failure Mechanisms of Composite Structures. , 1986 .

[18]  Daniel O. Adams,et al.  Interlaminar Strains and Compressive Strength Reductions Due to Nested Layer Waviness in Composite Laminates , 1998 .

[19]  K Hazra,et al.  Experimental fabrication and characterization of out-of-plane fiber waviness in continuous fiber-reinforced composites , 2012 .