Viscoelastic interlaminar shear modulus of fibre reinforced composites

2006 ◽  
Vol 75 (1-4) ◽  
pp. 185-191 ◽  
Author(s):  
A. Chan ◽  
X.L. Liu ◽  
W.K. Chiu
Keyword(s):  
Shear Modulus ◽  
Reinforced Composites ◽  
Interlaminar Shear ◽  
Interlaminar Shear Modulus ◽  
Fibre Reinforced Composites

scholarly journals Image-Based Inertial Impact (IBII) Tests for Measuring the Interlaminar Shear Moduli of Composites

2020 ◽  
Vol 6 (3) ◽  
pp. 373-398
Author(s):  
J. Van Blitterswyk ◽  
L. Fletcher ◽  
F. Pierron
Keyword(s):  
Shear Modulus ◽  
High Strain ◽  
Shear Behaviour ◽  
Strain Rates ◽  
Full Field ◽  
Shear Moduli ◽  
Test Configuration ◽  
Average Shear ◽  
Interlaminar Shear ◽  
Interlaminar Shear Modulus

Abstract The image-based inertial impact test has previously shown that inertial effects generated with high-strain-rate loading can be used to measure the dynamic constitutive properties of composites at strain rates on the order of $$1600\,{\rm s}^{-1}$$ 1600 s - 1 . This work represents an important next step in exploring the potential of this concept with two tests presented where loading heterogeneity is exploited to measure the interlaminar shear modulus and stress–strain behaviour at high strain rates. The first test configuration used a short-beam with asymmetric loading to activate the shear behaviour. The virtual fields method was used to directly identify the interlaminar shear modulus from heterogeneous full-field maps of strain and acceleration. Simulated experiments were used to optimise the test configuration, select optimal smoothing parameters, and quantify uncertainty from grid rotation on the shear modulus identifications. The test was validated experimentally with three different virtual fields identifying an average shear modulus ranging from 5.7 to 5.9 GPa measured at $$1600\,{\rm s}^{-1}$$ 1600 s - 1 , representing a 16–19% increase compared to quasi-static measurements. The shear modulus could also be identified from shear introduced into specimens tested in the standard, end-on interlaminar IBII configuration from slight in-plane misalignments of the impactor. The identified value of 5.6 GPa validates measurements from the first configuration and also demonstrates the capability to identify multiple interlaminar stiffness parameters from a single test.

scholarly journals Hybrid Thermoset Matrix Carbon Fibre Reinforced Composites, a Study of Interlaminar Properties

2017 ◽  
Vol 885 ◽  
pp. 309-313
Author(s):  
Tamás Turcsán ◽  
László Mészáros
Keyword(s):  
Carbon Fibre ◽  
Vinyl Ester ◽  
Unsaturated Polyester ◽  
Matrix Composites ◽  
Reinforced Composites ◽  
Shear Tests ◽  
Hybrid Matrix ◽  
Two Component ◽  
Interlaminar Shear ◽  
Fibre Reinforced Composites

In this study carbon fibre reinforced epoxy, unsaturated polyester, and vinyl ester based, binary (two-component) hybrid matrix polymer composites were produced and mechanically characterized by interlaminar shear tests. Fracture surface of tested composites were investigated by scanning electron microscopy. Toughness of hybrid matrix composites were identified and compared to that of the reference, non-hybrid matrix ones.

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