Fiber reinforced composite lattice sandwich structures are lightweight attractive for their excellent mechanical properties. It is an ideal option for the bulkhead of the superstructure of a ship. In this paper, a new sandwich panel with an orthogonal corrugate lattice core was investigated experimentally, theoretically, and numerically. Its flatwise compression properties were tested. And the influence of the geometry of the lattice core was discussed. The results showed that local matrix compression damage and delamination caused by compression at the rib corner were an initial failure in compression. The final failure was rib fracture in the experiment. Simulated and predicted modulus matched the experiment well with relative errors of 14.61% and 10.03%, respectively. The compressive strength in the simulation was 2.86% higher than that in the experiment. Compression properties were linearly dependent on the relative density of the lattice core. The compressive modulus and strength were most sensitive to the radius of arc transition at the rib corner.

纤维增强复合晶格夹层结构因其优异的机械性能而具有轻质吸引力。它是船舶上层建筑舱壁的理想选择。在本文中，通过实验、理论和数值研究了一种具有正交波纹晶格芯的新型夹芯板。测试了其平面压缩性能。并讨论了晶格核心几何形状的影响。结果表明，肋角处受压引起的局部基体受压损伤和分层是受压的初始失效。最终的失败是实验中肋骨断裂。模拟和预测模量与实验匹配良好，相对误差分别为 14.61% 和 10.03%。模拟中的抗压强度为 2。比实验中高 86%。压缩特性与晶格核心的相对密度呈线性关系。压缩模量和强度对肋角处的圆弧过渡半径最为敏感。