Environmentally friendly bio‐inspired folded sandwich panels—Fabrication and mechanical behavior

Abstract

A manufacturing method of folded and straight corrugated plate structure printed by environmentally‐friendly polylactic acid filled with environmentally‐friendly paraffin wax is proposed. Experimental investigations are conducted to characterize the out‐of‐plane compressive behaviors, including stress–strain curve, deformation processing, failure mode, strength, and energy absorption. By filling paraffin wax, the out‐of‐plane compression failure mode of sandwich materials from buckling (corresponding to empty corrugated sandwich panels) to wrinkling or crushing, which greatly improves the strength. Due to paraffin wax and its interaction with composite origami core, the energy absorption capacity is significantly enhanced. The research shows that the half‐filled folded corrugated sandwich structure not only has excellent specific energy absorption advantages, the paraffin wax has excellent heat absorption and release performance, and the unfilled part is just used as a heat flow channel to facilitate the flow of heat. This work has created a new method for rapid preparation of lightweight sandwich materials with not only high specific strength and high specific energy absorption, but also thermal channels.

Polymer composites–Special issue review for additive manufacturing of composites

“…1,[33][34][35] Several articles focus on improvements for characterization, [36][37][38][39] and quite a few seek to identify parameters to enhance the final part performance through processing improvements. [40][41][42][43][44][45][46][47][48] The studies investigating the use of biological materials and bio-inspired systems begin with a thorough review by Tao et al 3 with a special focus on natural fibers. Kumar et al [5][6][7] investigate the use of natural materials, specifically grass and palm fibers, in the use of brake friction materials.…”

“…Benfriha et al 46 and Singh et al 40 introduce a study to correlate the processing parameters on the resulting performance of a polymer matrix composite. Several authors investigate final part enhancements through novel manufacturing methods, [41][42][43] while others focus on novel fillers and additives such as metal 44 and onyx. 45 Mustafa et al 47 enhance the performance of the matrix through a PLA/epoxy blend of a milled glass fiber material processed using the FFF process, whereas Wang et al 48 enhance the performance of the surface of the deposited PLA through a milled carbon fiber based coating.…”

“…Papers in this special issue range from the use of bio and bio‐inspired materials, 2,3,5–12 materials and material systems that benefit from nanoscale enhancements, 13–23 advances in the medical field, 24–26 additive material systems utilizing thermosets, 27–29 large scale additive manufacturing, 30–32 and some rather novel applications in AM 1,33–35 . Several articles focus on improvements for characterization, 36–39 and quite a few seek to identify parameters to enhance the final part performance through processing improvements 40–48 …”