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首页> 外文期刊>Composite Structures >Analysis and numerical prediction of the delamination behavior of debonded asymmetric sandwich shells with a thin-walled skin considering plastic deformation
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Analysis and numerical prediction of the delamination behavior of debonded asymmetric sandwich shells with a thin-walled skin considering plastic deformation

机译：考虑塑性变形的薄壁蒙皮非对称夹层薄壳脱层行为的分析与数值预测

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摘要

This paper analyzes the delamination behavior of asymmetric sandwich shells with one thin-walled aluminum skin. In-plane compression tests of specimens with a delamination of the aluminum skin show high dependencies of the failure loads and the debond behavior on the delamination size and its in-depth position relative to the adhesive layer. All delaminations proceed in an unstable manner within the foam core close to the adhesive interface. A FE model is created and correctly reproduces the specimen's deformation and buckling behavior. Its predictions of failure loads are conservative but show some deviations. Furthermore, the numerical simulations are used for the analysis of occurring plastic strains in the aluminum skin. As shown, they have major influence on the delamination behavior. Large portions of the debonded areas are plastically deformed and relatively large amounts of deformation energy are dissipated by the plastic deformation.
机译：本文分析了具有一个薄壁铝皮的不对称夹层壳的分层行为。带有铝表皮分层的样品的面内压缩测试表明，破坏载荷和剥离性能对分层尺寸及其相对于粘合剂层的深度位置具有高度依赖性。所有分层均以不稳定的方式在靠近粘合剂界面的泡沫芯内进行。将创建一个FE模型，并正确地再现样本的变形和屈曲行为。它对失效载荷的预测是保守的，但显示出一些偏差。此外，数值模拟用于分析铝皮中发生的塑性应变。如图所示，它们对分层行为有重大影响。脱粘区域的大部分塑性变形，并且通过塑性变形耗散了相对大量的变形能量。

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  • 来源
    《Composite Structures》 |2018年第3期|220-232|共13页
  • 作者

    Pietrek Martin; Horst Peter;

  • 作者单位

    Braunschweig Inst Technol, Inst Aircraft Design & Lightweight Struct, Hermann Blenk Str 35, D-38108 Braunschweig, Germany;

    Braunschweig Inst Technol, Inst Aircraft Design & Lightweight Struct, Hermann Blenk Str 35, D-38108 Braunschweig, Germany;

  • 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

    Asymmetric sandwich; Delamination; Experiment; FEM; Plastic deformation;

    机译：不对称夹层;分层;实验;有限元;塑性变形;

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