Modeling of Compressive Strength for Unidirectional Fiber Reinforced Composites with Nanoparticle Modified Epoxy Matrix

Incorporation of nanoparticles into polymer matrix was found to considerably improve the compressive performance of unidirectional fiber reinforced composites. In our experimental study, an increase by 62.7% in the longitudinal compressive strength of unidirectional carbon fiber reinforced composites is attained by dispersing 8.7 vol.% SiO2 nanoparticles into epoxy matrix. A compressive strength model is established to quantitatively describe the reinforcing effects of nanoparticles, which combines a modified microbuckling model for unidirectional fiber reinforced composites and a constitutive model for nanocomposite matrices under compression. In the two models, the coupling of damage and plasticity is considered to contribute to the nonlinear response of nanocomposite matrix. The proposed strength model demonstrates excellent prediction capability in experimental verification. A small relative deviation below 8.2% is achieved between the predicted compressive strength of unidirectional fiber reinforced composites and the measured values, which is at the same level of random error in experiments.

[1]  Chiara Bedon,et al.  Structural glass beams with embedded GFRP, CFRP or steel reinforcement rods: Comparative experimental, analytical and numerical investigations , 2019, Journal of Building Engineering.

[2]  B. Fiedler,et al.  Comparison of Analytical Approaches Predicting the Compressive Strength of Fibre Reinforced Polymers , 2018, Materials.

[3]  R. Eslami‐Farsani,et al.  On the mechanical characterizations of unidirectional basalt fiber/epoxy laminated composites with 3-glycidoxypropyltrimethoxysilane functionalized multi-walled carbon nanotubes–enhanced matrix , 2016 .

[4]  G. Kermouche,et al.  Determination of mechanical properties by nanoindentation independently of indentation depth measurement , 2012 .

[5]  J. Tsai,et al.  Investigating Silica Nanoparticle Effect on Dynamic and Quasi-static Compressive Strengths of Glass Fiber/Epoxy Nanocomposites , 2009 .

[6]  K. Friedrich,et al.  Fracture behaviours of in situ silica nanoparticle-filled epoxy at different temperatures , 2008 .

[7]  C. Sun,et al.  Strength of unidirectional glass/epoxy composite with silica nanoparticle-enhanced matrix , 2008 .

[8]  I. Daniel,et al.  Mechanical enhancement of carbon fiber/epoxy composites by graphite nanoplatelet reinforcement , 2007 .

[9]  Arun K. Subramaniyan,et al.  Enhancing compressive strength of unidirectional polymeric composites using nanoclay , 2006 .

[10]  Pierre Ladevèze,et al.  Durability of CFRP laminates under thermomechanical loading: A micro–meso damage model , 2006 .

[11]  Rajesh Kumar,et al.  Compressive strength of unidirectional composites: evaluation and comparison of prediction models , 1999 .

[12]  Constantinos Soutis,et al.  Compressive failure of 0° unidirectional carbon-fibre-reinforced plastic (CFRP) laminates by fibre microbuckling , 1999 .

[13]  Norman A. Fleck,et al.  Compression Failure Mechanisms in Unidirectional Composites , 1992 .

[14]  G. P. Tandon,et al.  A Theory of Particle-Reinforced Plasticity , 1988 .

[15]  J. Chaboche.  Continuum Damage Mechanics: Part I—General Concepts , 1988 .

[16]  Constantinos Soutis,et al.  Fracture mechanisms and failure analysis of carbon fibre/toughened epoxy composites subjected to compressive loading , 2010 .

[17]  C. Sun,et al.  Compressive strength of unidirectional fiber composites with matrix non-linearity , 1994 .

[18]  Pierre Ladevèze,et al.  Damage modelling of the elementary ply for laminated composites , 1992 .

[19]  Constantinos Soutis.  Measurement of the static compressive strength of carbon-fibre/epoxy laminates , 1991 .

[20]  Richard M. Christensen,et al.  A critical evaluation for a class of micro-mechanics models , 1990 .

[21]  B. W. Rosen,et al.  Mechanics of composite strengthening. , 1965 .