The behaviour of curved-crease foldcores under low-velocity impact loads

By J. Gattas, Zhuhong You. 2015

139 citations recorded by the source corpus.

The primary aim of this paper was to manufacture aluminium curved-crease foldcores and assess their behaviour under quasi-static compressive loads, relative to existing straight-crease foldcores and a honeycomb cores. Four foldcore types, standard, indented, and two curved-crease foldcore tessellations, were constructed with comparable density and height to a commercial honeycomb core. An experimental and numerical study of foldcore performance under quasi-static crush loads showed that all foldcore types were highly sensitive to geometric imperfections, and that curved-crease foldcores had significantly higher energy-absorption capability than straight-crease foldcores. Validated numerical methods were used in a comprehensive parametric study on curved-crease foldcore geometry, with two main findings. First, it was seen that altering the curved-crease foldcore tessellation did not provide significant energy-absorption capability beyond that achievable with direct changes to the core aspect ratio. Second, an optimum configuration of the curved-crease foldcore was found which appeared to offer a comparable out-of-plane strength, energy-absorption under quasi-static compressive loads, and stiffness to a honeycomb core. A brief numerical investigation into low-velocity impact loading showed that curved-crease foldcores were the only foldcore type that saw a substantial inertial strengthening under dynamic loading, although not to as large an extent as honeycomb.

Subfields: Materials Chemistry, Mechanical Engineering, Mechanics of Materials

View Paper: https://www.semanticscholar.org/paper/30d6d1753ce3639778e0aa2324c1031cea0adf35

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In Materials Chemistry

In Mechanical Engineering

In Mechanics of Materials

Citations in the corpus

A review of the recent trends on core structures and impact response of sandwich panels (2021, background): “The experimental and numerical investigations of four types of folded cores were conducted to study the performance response under quasi-static compressive loads.(198) It was observed that the curved-crease folded cores had significantly higher energy-absorption capability than straight-crease folde”
Bar and hinge models for scalable analysis of origami (2017, methodology): “In this paper, we use a linear elastic bending moment behavior at the fold lines, however the model can be adapted to capture nonlinearity (e.g. Giampieri et al. (2011), Mentrasti et al. (2013b)).”
Design of three-dimensional origami structures based on a vertex approach (2015, background): “Cylindrical origami structures have found applications in energy absorption devices [2,26], whereas curved-creased foldcores have been found to outperform straight-creased foldcores under impact loads [28].”