Bending Response of 3D-Printed Titanium Alloy Sandwich Panels with Corrugated Channel Cores

Abstract

Ultralight sandwich constructions with corrugated channel cores (i.e., periodic fluid-through wavy passages) are envisioned to possess multifunctional attributes: simultaneous load-carrying and heat dissipation via active cooling. Titanium alloy (Ti-6Al-4V) corrugated-channel-cored sandwich panels (3CSPs) with thin face sheets and core webs were fabricated via the technique of selective laser melting (SLM) for enhanced shear resistance relative to other fabrication processes such as vacuum brazing. Four-point bending responses of as-fabricated 3CSP specimens, including bending resistance and initial collapse modes, were experimentally measured. The bending characteristics of the 3CSP structure were further explored using a combined approach of analytical modeling and numerical simulation based on the method of finite elements (FE). Both the analytical and numerical predictions were validated against experimental measurements. Collapse mechanism maps of the 3CSP structure were subsequently constructed using the analytical model, with four collapse modes considered (face-sheet yielding, face-sheet buckling, core yielding, and core buckling), which were used to evaluate how its structural geometry affects its collapse initiation mode.

Thermomechanical Behaviors of a Novel Double-Layer Corrugated Core Structure for Thermal Protection System

“…Hu et al [18] designed corrugated lattice truss sandwich panels and observed potential failure modes of structure fracture and bulking in compression. Zhao et al [19] proposed a corrugated channel sandwich core available for load-bearing and active cooling systems, whose compression performance was better under the same density. Ravishankar et al [20] carried out thermal and mechanical analyses with uncertainties for ITPS with double layers.…”

Self-Healing and Highly Stretchable Hydrogel for Interfacial Compatible Flexible Paper-Based Micro-Supercapacitor

“…Three-dimensional (3D) printing technique can manufacture the 3D physical consistent with the corresponding mathematical mode by stacking materials layer by layer [25][26][27]. Benefiting from its process flexibility and large-scale scalability, the cost-effective direct ink writing (DIW) method, known as 3D printing based on ink extrusion, opens the way for the next-generation power sources [28].…”

Energy Absorbing Properties Analysis of Layers Structure of Titanium Alloy Ti6Al4V during Dynamic Impact Loading Tests

“…The mechanical and physical properties of titanium alloy Ti6Al4V have been broadly described in the literature. These alloys can be widely applied in many fields, such as 3D printing of ultralight sandwich structures with corrugated cores in aerospace [ 13 ] and medical [ 14 ] applications.…”