One of the main disadvantages of the regular sinusoidal corrugated core sandwich panels is dependency of their bending properties on its arrangement. To resolve the disadvantage, a bi-directional sinusoidal corrugated core panel was proposed. Hence, the influence of the waves number on the flexural properties of the panels with bi-directional or regular corrugated cores was studied. The pattern of each corrugated core consists of cosine curve with certain period and amplitude. Four different periods (T = 30, 37.5, 50 and 75 mm) were considered for the corrugated cores. Moreover, possible arrangements (transvers or longitudinal wave, arch downward or upward) of the regular corrugated cores with respect to the flexural loading direction were regarded. It was observed that the panel having the core with T = 37.5 mm has the highest specific energy absorption among the bi-directional corrugated core structures. The specific energy absorption of the novel corrugated core panels is improved as compared to the regular core with transverse arrangement.

规则的正弦波纹状芯夹心板的主要缺点之一是其弯曲特性取决于其布置。为了解决该缺点，提出了一种双向正弦波纹芯板。因此，研究了波数对双向或规则波纹芯板的弯曲性能的影响。每个波纹芯的图案都由具有一定周期和幅度的余弦曲线组成。波纹芯考虑了四个不同的周期（T = 30、37.5、50和75 mm）。此外，考虑了规则波纹芯相对于挠曲载荷方向的可能布置（横向或纵向波，向下或向上拱形）。观察到该板具有T ＝ 37的芯。5 mm具有双向波纹芯结构中最高的比能量吸收。与具有横向布置的常规芯相比，新型波纹芯板的比能量吸收得到改善。