Experimental and Simulation Studies on the Compressive Properties of Brazed Aluminum Honeycomb Plates and a Strength Prediction Method

Abstract

To study the compressive mechanical properties of a new type of brazed aluminum honeycomb plate (BAHP), tensile tests on single- and brazed-cell walls as well as compression tests in the out-of-plane, in-plane longitudinal, and transverse directions were conducted. Compared to the material properties of a traditional glued aluminum honeycomb plate (GAHP), those of the single- and brazed-cell walls of the BAHP are entirely different. Therefore, their characteristics should be considered separately when performing theoretical and simulation analysis. Under out-of-plane compression, the core of the BAHP did not debond, owing to its higher strength than that of the GAHP. In comparison, under in-plane compression in the longitudinal and transverse directions, the load–displacement characteristics, ultimate load, and failure modes also differed, and there was no large-scale cracking. Considering the characteristics of the BAHP, a strength prediction method was proposed. The simulation results demonstrated that the model built based on the new method was highly consistent with the experimental results. Defects with uneven height and debonding will cause the overall instability, and the degree of defects will influence the strength and instability displacement, which have little impact on the elastic stage. Moreover, the model considering defects is closer to the test results.

Clamping method and mechanical properties of aluminum honeycomb cylindrical curved plates under radial compression

“…In view of this, based on existing experimental, simulation and theoretical research on the radial compression performance of planar honeycomb plates, 16,17 this work took the most commonly used aluminum cylindrical honeycomb plate (CHP) as the subject and investigated its radial compression properties, which is the most basic static behavior of the curved plate. Additionally, corresponding test methods through the finite element method (FEM) from the unique perspective of different clamping methods (constraints) were also studied, which will shed light on the development of the radial compression test method, the formulation of test standards and the engineering application of curved surface sandwich plates.…”

Crashworthiness of embedded composite structures coupling carbon fiber reinforced plastic tubes and aluminum honeycombs

“…13,[16][17][18] Likewise, new reinforcement schemes have been proposed to improve the tensile strength to avoid debonding. 19,20 Some papers also replace the hexagonal honeycomb core with re-entrant, chiral, or combination to study the compression performance under quasi-static load. [21][22][23][24][25] Nomex honeycomb's mechanical characteristics have also been researched.…”