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Mechanical behaviors of C/SiC pyramidal lattice core sandwich panel under in-plane compression

机译：面内压缩下C / SiC金字塔形格芯夹芯板的力学行为

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摘要

C/SiC composite lattice-core sandwich panels combined with thermal insulation and load-bearing capacities are considered as the most promising candidates for thermal protection system (TPS). In this study, C/SiC pyramidal lattice-core sandwich panel with different inclination angles were fabricated using a compression molding and precursor infiltration and pyrolysis (PIP) method. In-plane compressive experiments are conducted to study the failure behavior of these sandwich panels. The analytical failure modes including elastic buckling, face sheet wrinkling, face sheet crushing and interlayer delamination are established to construct the mechanism maps. The effect of geometrical parameters on failure modes are symmetrically and analytically studied. Due to the limits of the cost, virtual tests are supplemented by finite element method (FEM). Face sheet crushing is experimentally observed for almost all specimens with different inclination angles, which is in good agreement with analytical predictions. Numerical simulation results show that interlayer delamination occurs at the attachment between face sheet and lattice core after elastic buckling and core shear buckling. This paper gives us some fundamental understanding of the mechanical response and failure mechanism of C/SiC composite latticecore sandwich panels.
机译：C / SiC复合晶格芯夹芯板与隔热和承重能力相结合，被认为是最有前途的热防护系统（TPS）候选材料。在这项研究中，使用压缩成型和前体渗透与热解（PIP）方法制造了具有不同倾角的C / SiC金字塔形格芯夹芯板。进行平面压缩实验以研究这些夹心板的破坏行为。建立了包括弹性屈曲，面板起皱，面板压扁和层间分层在内的分析破坏模式，以建立力学图。对称地分析了几何参数对失效模式的影响。由于成本的限制，虚拟测试通过有限元方法（FEM）进行了补充。实验观察到几乎所有具有不同倾角的样本都发生面板破碎，这与分析预测非常吻合。数值模拟结果表明，在弹性屈曲和岩心剪切屈曲之后，面板与晶格核之间的连接处会发生层间分层。本文使我们对C / SiC复合晶格夹芯板的力学响应和破坏机理有了一些基本的了解。

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  • 来源
    《Composite Structures》 |2019年第4期|103-113|共11页
  • 作者

    Chen Yanfei; Zhang Lu; Zhao Yunong; He Rujie; Ai Shigang; Tang Liqun; Fang Daining;

  • 作者单位

    Beijing Inst Technol, Inst Adv Struct Technol, Beijing 100081, Peoples R China|South China Univ Technol, Coll Civil Engn & Transportat, Guangzhou 510640, Guangdong, Peoples R China;

    Beijing Inst Technol, Inst Adv Struct Technol, Beijing 100081, Peoples R China;

    Peking Univ, Coll Engn, State Key Lab Turbulence & Complex Syst, Beijing 100871, Peoples R China;

    Beijing Inst Technol, Inst Adv Struct Technol, Beijing 100081, Peoples R China;

    Beijing Inst Technol, Inst Adv Struct Technol, Beijing 100081, Peoples R China;

    South China Univ Technol, Coll Civil Engn & Transportat, Guangzhou 510640, Guangdong, Peoples R China;

    Beijing Inst Technol, Inst Adv Struct Technol, Beijing 100081, Peoples R China|South China Univ Technol, Coll Civil Engn & Transportat, Guangzhou 510640, Guangdong, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    C/SiC composite; Lattice-core sandwich panel; Failure mechanism; Mechanism maps; Numerical simulation;

    机译：C / SiC复合材料;晶格夹芯板;破坏机理;机理图;数值模拟;

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