The objective of this study is to gain an understanding of the influence of a biaxially corrugated core geometry on flexure stiffness of wood-strand composite sandwich panel for building construction applications where member deflections often govern the design. To this aim, a parametric study was conducted using a finite element (FE) model to understand the sensitivity of the bending stiffness of a wood strand composite core to all variations in its geometry. A unit cell (UC) in the core was defined to simplify the determination of all parameters capable of altering the core geometry. Although eight parameters were chosen for this parametric study, the interaction between these parameters in changing the geometry required simulation of 13 cases to fully understand the influence of these eight core parameters on the bending stiffness. The comparison between the bending stiffness normalized by the width of the test specimens not only indicated the effect of these parameters on the bending stiffness but also revealed the effectiveness of each parameter. Based on these results, the geometry of the core was redesigned to increase the flexural stiffness. The bending stiffness of the new and redesigned core was 43 % and 126 % stiffer than the initial core in the longitudinal and transverse directions, respectively. After manufacturing a new mold based on these result and fabrication of a wood strand core, the experimental results exceeded our expectation. The experimental results revealed that the bending stiffness of the new core is 59 % and 203 % higher than initial one in the longitudinal and transverse directions, respectively.

这项研究的目的是要了解双轴波纹芯几何形状对木结构复合材料夹芯板的挠曲刚度的影响，该结构在构件挠度通常决定设计的建筑应用中使用。为此，使用有限元（FE）模型进行了参数研究，以了解木绞线复合芯的弯曲刚度对其几何形状所有变化的敏感性。在纤芯中定义了一个晶胞（UC），以简化对能够更改纤芯几何形状的所有参数的确定。尽管为该参数研究选择了八个参数，但是在更改几何形状时这些参数之间的相互作用需要模拟13种情况，以充分了解这八个核心参数对弯曲刚度的影响。通过试样宽度归一化的弯曲刚度之间的比较不仅表明了这些参数对弯曲刚度的影响，而且还揭示了每个参数的有效性。基于这些结果，重新设计了芯部的几何形状，以增加抗弯刚度。新的和重新设计的型芯在纵向和横向上的抗弯刚度分别比初始型芯高43％和126％。根据这些结果制造了新模具并制造了木绞线芯之后，实验结果超出了我们的预期。实验结果表明，新铁芯在纵向和横向上的抗弯刚度分别比初始铁芯高59％和203％。