Wood-based sandwich composite with a paper honeycomb core, especially for thick boards, has the advantage of high strength-to-weight ratio for the use in lightweight furniture products, interior walls etc. Employing both theoretical and experimental methods, this study investigated the influencing factors of various failure modes and its transition to obtain optimized structural parameters after a quasi-static load was applied. The results reveal that the skins of MDF are too strong for the paper honeycomb core. Both failure modes are caused by weak core properties. If the thickness or strength of the skins could be reduced or the core strength could be reinforced, then optimal failure mode of simultaneous core and skin failure could be reached. The intersection point of three transition lines is the best combination of structural parameters, meaning highest strength-to-weight ratio. At this point, failure of core shear, indentation and face fracture occurs simultaneously. The distance from a structural parameter to intersection is an effective index to express the degree of optimization for the strength-to-weight ratio of composites. Specimens close to the intersection point have optimal structural parameters and high strength-to-weight ratio. On application level, the optimum strength-to-weight ratio could be obtained easily by adjusting the surface or core thickness, if the materials were fixed first.

具有纸蜂窝芯的木基三明治复合材料，特别是用于厚板，具有高强度/重量比的优势，可用于轻质家具产品，内墙等。本研究采用理论和实验方法，研究了准静态载荷作用后，各种破坏模式的影响因素及其过渡以获得最佳结构参数。结果表明，MDF的表皮对于纸蜂窝芯来说太坚固了。两种故障模式都是由于芯材性能不佳引起的。如果可以减小表皮的厚度或强度，或者可以增强芯的强度，则可以达到同时发生芯和表皮失效的最佳失效模式。三个过渡线的交点是结构参数的最佳组合，意味着最高的强度重量比。此时，岩心剪切，压痕和面破裂的破坏同时发生。结构参数到交叉点的距离是表达复合材料强度重量比优化程度的有效指标。靠近交点的标本具有最佳的结构参数和较高的强度重量比。在应用水平上，如果首先固定材料，则可以通过调节表面或芯部厚度轻松获得最佳的强度重量比。结构参数到交叉点的距离是表达复合材料强度重量比优化程度的有效指标。靠近交点的标本具有最佳的结构参数和较高的强度重量比。在应用水平上，如果首先固定材料，则可以通过调节表面或芯部厚度轻松获得最佳的强度重量比。结构参数到交叉点的距离是表达复合材料强度重量比优化程度的有效指标。靠近交点的标本具有最佳的结构参数和较高的强度重量比。在应用水平上，如果首先固定材料，则可以通过调节表面或芯部厚度轻松获得最佳的强度重量比。