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Low-velocity impact response of geometrically asymmetric slender sandwich beams with metal foam core

机译:带有金属泡沫芯的几何不对称细长夹层梁的低速冲击响应

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摘要

The low-velocity impact response of fully clamped slender metal foam core sandwich beams with geometrically asymmetric cross-section struck by a heavy mass at midspan is investigated. The exact and approximate yield criteria for metal sandwich cross-section are presented considering the effect of core strength. Using the yield criteria, the analytical solutions for large deflection of the fully clamped slender sandwich beams, including dynamic and quasi-static solutions, are derived respectively. Also, finite element (FE) calculations are carried out to validate the analytical model. Moreover, the effects of material elasticity and strain hardening of face sheets are considered in FE analysis. Comparisons of the FE results and analytical solutions reveal that the present analytical model enables the acceptable predictions of the low-velocity impact response of fully clamped asymmetric slender sandwich beams. Material elasticity and strain hardening of face sheets have minor effects on dynamic response.
机译:研究了在中跨处完全重载的夹杂有几何形状不对称截面的细长金属泡沫芯夹心梁的低速冲击响应。考虑到芯强度的影响,给出了金属夹心截面的精确和近似屈服准则。使用屈服准则,分别导出了完全夹紧的细长夹层梁大挠度的解析解,包括动态解和准静态解。同样,进行有限元(FE)计算以验证分析模型。此外,在有限元分析中考虑了面板的材料弹性和应变硬化的影响。有限元结果与解析解的比较表明,本解析模型能够对完全夹持的非对称细长夹层梁的低速冲击响应做出可接受的预测。面板的材料弹性和应变硬化对动态响应的影响很小。

著录项

  • 来源
    《Composite Structures》 |2013年第4期|1-14|共14页
  • 作者单位

    State Key Laboratory for Strength and Vibration of Mechanical Structures, Department of Engineering Mechanics, Xi'an Jiaotong University, Xi'an 710049, China;

    State Key Laboratory for Strength and Vibration of Mechanical Structures, Department of Engineering Mechanics, Xi'an Jiaotong University, Xi'an 710049, China;

    State Key Laboratory for Strength and Vibration of Mechanical Structures, Department of Engineering Mechanics, Xi'an Jiaotong University, Xi'an 710049, China;

    State Key Laboratory for Strength and Vibration of Mechanical Structures, Department of Engineering Mechanics, Xi'an Jiaotong University, Xi'an 710049, 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

    geometrically asymmetric sandwich beams; yield criterion; low-velocity impact; large deflection;

    机译:几何上不对称的夹层梁;屈服准则低速冲击;大挠度;

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