The failure mechanism of corrugated sandwich panels under three-point bending is investigated experimentally and numerically using ABAQUS/Standard. Three dominant modes of failure, viz. face buckling, face yielding and core buckling, previously reported by others, were also identified here and they were found to be affected by the face-sheet thickness, core height and the corrugation angle of the panel. It will be shown that the deformation map, and regime boundaries, theoretically predicted previously by Valdevit et al. are valid only for restricted cases when the indenter and support pins are simultaneously located at a vertex; their prediction breaks down if this condition is not met and alternative failure maps will be developed here. The indenter nose shape (flat and cylindrical), size of the indenter and the location of indentation – these were not previously investigated by others – will be shown to play a significant role on the mode of failure that a panel subsequently develops.

使用 ABAQUS/Standard 对波纹夹芯板在三点弯曲下的破坏机理进行了实验和数值研究。三种主要的失败模式，即。其他人先前报道的面屈曲、面屈服和芯部屈曲也在这里被识别，并且发现它们受到面板厚度、芯部高度和面板波纹角的影响。将表明 Valdevit 等人先前在理论上预测的变形图和区域边界。仅适用于压头和支撑销同时位于顶点的受限情况；如果不满足此条件，他们的预测就会失效，并且将在此处开发替代故障图。压头鼻形（扁平和圆柱形），