Behavior of 3D orthogonal woven CFRP composites. Part I. Experimental investigation

Tan, Ping; Tong, Liyong; Steven, Grant P.; Ishikawa, Takashi

doi:10.1016/s1359-835x(99)00070-6

Cited by 133 publications

(80 citation statements)

References 4 publications

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“…The study also highlighted the increased level of crimp in the weft yarn compared to the warp stuffers due to these yarns not being held under tension in the weaving process. Similar findings were presented by Tan et al [3] and Callus et al [4]. The latter study presented results that showed the effect of resin channels on failure initiation and crack propagation.…”

Section: Introductionsupporting

confidence: 87%

Characterisation of 3D woven composite internal architecture and effect of compaction

Mahadik

Brown

Hallett

2010

Composites Part A: Applied Science and Manufacturing

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Yarn waviness and resin rich regions play a major role in 3D woven composite mechanical properties and failure. A detailed study of two angle-interlock 3D woven carbon fabrics has been carried out to characterise these architectural features and how they change under increasing levels of compaction. Computerised tomography (CT) xray scanning was used to capture the internal architecture of the fabrics. The study focussed on the out-of-plane crimp of the yarns and the size and shape of resin rich regions in consolidated panels. Results showed areas of high local crimp at weft/weaver interlace points. This was exacerbated at low levels of compaction but was eventually lowered under higher compaction levels. The appearance of resin channels was found to be heavily dependent on weave style, with large resin pockets appearing in weaver yarn planes which decreased significantly in size under compaction with distinctive changes in profile.

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Section: Introductionsupporting

confidence: 87%

Characterisation of 3D woven composite internal architecture and effect of compaction

Mahadik

Brown

Hallett

2010

Composites Part A: Applied Science and Manufacturing

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“…In a study by Rao et al [24] it has been shown that the in-plane properties decrease with the addition of 3D reinforcements when compared to equivalent unidirectional laminates. This decrease has been attributed to several factors including damage induced during the weaving process [25], large epoxy pockets, and the additional undulations (stress concentrations) created by the weaving architecture [26,27]. It is likely that these defects cause premature failure in the composite.…”

Section: Inter-laminar Shear Testsmentioning

confidence: 99%

Monotonic and cyclic short beam shear response of 3D woven composites

Walter

Subhash

Sankar

et al. 2010

Composites Science and Technology

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a b s t r a c tMonotonic, multi-step and cyclic short beam shear tests were conducted on 2D and 3D woven composites. The test results were used to determine the effect of z-yarns on the inter-laminar shear strength as well as the multi-loading behavior. The presence of z-yarns was found to affect not only the inter-laminar shear strength of the composite but also the behavior of the composite beyond the elastic limit. Microscopic examination of the damaged specimens revealed large delamination cracks in 2D woven composites while delamination cracks were hindered by z-yarns in 3D composites. This crack arrest phenomena resulted in a reduction in inter-laminar crack lengths and a higher distribution of the micro-cracks throughout the 3D composite. The multi-step and cyclic loading tests are found to be useful in the monitoring of specimen behavior during short beam shear testing. The induced damage was quantified in terms of the loss of strength and stiffness during each loading cycle. It was found that while the 2D composites have higher damage resistance, the 3D composites have a higher damage tolerance.

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“…The results are compared with classical theoretical results and experimental data [15][16][17][18][19][20][21][22][23].…”

Section: Numerical Prediction On Mechanical Parameters Of Composite Mmentioning

confidence: 99%

A two-scale method for identifying mechanical parameters of composite materials with periodic configuration

Cui

2006

Acta Mech Sin

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In this paper, a two-scale method (TSM) is presented for identifying the mechanics parameters such as stiffness and strength of composite materials with small periodic configuration. Firstly, a formulation is briefly given for two-scale analysis (TSA) of the composite materials. And then a two-scale computation formulation of strains and stresses is developed by displacement solution with orthotropic material coefficients for three kinds of such composites structures, i.e., the tension column with a square cross section, the bending cantilever with a rectangular cross section and the torsion column with a circle cross section. The strength formulas for the three kinds of structures are derived and the TSM procedure is discussed. Finally the numerical results of stiffness and strength are presented and compared with experimental data. It shows that the TSM method in this paper is feasible and valid for predicting both the stiffness and the strength of the composite materials with periodic configuration.

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Behavior of 3D orthogonal woven CFRP composites. Part I. Experimental investigation

Cited by 133 publications

References 4 publications

Characterisation of 3D woven composite internal architecture and effect of compaction

Characterisation of 3D woven composite internal architecture and effect of compaction

Monotonic and cyclic short beam shear response of 3D woven composites

A two-scale method for identifying mechanical parameters of composite materials with periodic configuration

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