3D digital image correlation measurements during shaping of a non-crimp 3D orthogonal woven E-glass reinforcement

Abstract

This paper illustrates a methodology for the characterization of textile composite reinforcements during experimental simulation of forming processes. In particular, being the shear deformation considered as the primary deformation mechanism during shaping, the evolution of shear angle distribution on the reinforcement surface is measured by means of 3D digital image correlation analyses. Two different image correlation software programs, i.e. VIC-3D and MatchID3D, are used to study the forming process of a single layer E-glass non-crimp 3D orthogonal woven reinforcement (commercialized under trademark 3WEAVE® by 3Tex Inc.). The comparison of the displacement and shear angle distributions of the reinforcement, shaped on tetrahedral and double-dome moulds, pointed out a good agreement between the results obtained with both software packages

The bias-extension test for the analysis of in-plane shear properties of textile composite reinforcements and prepregs: a review

“…4) is the length of the central zone C. The shear angle γ can also be measured directly by an optical measure. Figure 6 shows the shear angle field obtained using a DIC measure (digital image correlation) [25,37,38]. This optical method is well suited for measurements of textile materials for which sensors in contact with the fabric are difficult to use.…”

Influence of matrix toughness and interfacial strength on the toughness of epoxy composites with ductile steel fabric reinforcement

“…In order to get a view on the full-field surface displacements and deformations, the TU specimens were additionally instrumented with stereovision Digital Image Correlation (3D-DIC) (Figure 3(a)). [11,12] The principle behind this technique is to monitor a speckle pattern on the specimen surface during loading and to calculate the full surface strain fields afterwards by correlating the consecutive images. A two camera stereovision set-up was chosen over a single camera set-up, because it can measure out-of-plane motions of the specimen surface during the test.…”

Contributions of Stepan V Lomov to the research and development of composite materials

“…These measurements are valuable to validate the shaping simulations. 40,42,43 S.V. Lomov and co-authors conclude that optical full-field strain techniques are the preferable (sometimes the only) way of assuring correct deformation measurements during textile reinforcement deformation.…”