Abstract A novel three-dimensional (3D) corrugated core sandwich structure was designed and fabricated by auto-cutting process. Mechanical behaviors and failure mechanism of 3D corrugated core sandwich structures were investigated. Analytical models were developed to estimate the strength, stiffness and dominant failure modes. In order to demonstrate sensitivity of the graded parameters on mechanical behaviors of 3D corrugated core sandwich structures, the specimens with different graded parameters were fabricated and tested under compression and bending loads. Results showed that the graded parameters have obviously influences on the mechanical properties and failure modes of 3D corrugated core sandwich structures. The predictions were also compared with the experiments and the results showed good agreements. Failure maps were constructed to illustrate the controlling failure mechanisms in various regions with different parameters.

中文翻译：

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具有三维波纹芯的碳/环氧树脂复合夹层结构的力学响应

摘要 采用自动切割工艺设计并制造了一种新型三维（3D）波纹芯夹层结构。研究了 3D 波纹芯夹层结构的力学行为和失效机制。开发了分析模型来估计强度、刚度和主要失效模式。为了证明梯度参数对 3D 波纹芯夹层结构力学行为的敏感性，制备了具有不同梯度参数的试样，并在压缩和弯曲载荷下进行了测试。结果表明，梯度参数对3D波纹芯夹层结构的力学性能和破坏模式有明显影响。还将预测与实验进行了比较，结果显示出良好的一致性。