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Effect of punch and specimen dimensions on the confined compression behavior of S-2 glass/epoxy composites

机译：冲头和试样尺寸对S-2玻璃/环氧树脂复合材料有限压缩行为的影响

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摘要

The behavior of composite materials under transverse loading is often characterized using quasi-static experimental methods. A complete characterization requires experimentation for a range of specimen and impactor dimensions, necessitating a sizeable test matrix. However, if dimensional effects on specimen damage behavior can be understood, the number of tests required can be reduced. The present study considers confined compression testing of an S-2 glass/SCI 5 resin composite under quasi-static loading to understand damage initiation and propagation during penetration. A test matrix of 29 punch-specimen combinations was tested to determine the fracture behavior and applied load at failure. A finite element (FE) model of the experiments was also created to study the internal stress distributions. Characteristic fracture angles and applied stresses at failure were observed to be independent of punch-specimen dimensions. However, varying the dimensions of the punch and specimen was found to change the behavior of the internal stresses. Various failure criteria were evaluated using the numerical stress distributions to predict damage initiation. A Mohr-Coulomb compression-shear interaction on the fracture plane was found to best explain the observed experimental behavior.
机译：通常使用准静态实验方法来表征复合材料在横向载荷下的行为。完整的表征需要对一定范围的样品和撞击器尺寸进行实验，从而需要相当大的测试矩阵。但是，如果可以理解尺寸对试样损坏行为的影响，则可以减少所需的测试次数。本研究考虑了在准静态载荷下对S-2玻璃/ SCI 5树脂复合材料进行的压缩试验，以了解穿透过程中损伤的产生和传播。测试了29个冲头-试样组合的测试矩阵，以确定断裂行为和破坏时施加的载荷。还创建了实验的有限元（FE）模型以研究内部应力分布。观察到断裂时的特征性断裂角度和施加应力与冲头试样尺寸无关。但是，发现改变冲头和试样的尺寸会改变内部应力的行为。使用数值应力分布来评估各种破坏准则，以预测破坏的开始。发现在断裂面上的莫尔-库仑压缩-剪切相互作用可以最好地解释观察到的实验行为。

著录项

  • 来源
    《Composite Structures》 |2011年第7期|p.1726-1737|共12页
  • 作者

    A.F. Manzella; B.A. Gama; J.W. Gillespie Jr;

  • 作者单位

    Department of Civil and Environmental Engineering, University of Delaware, Newark, DE 19711, United States;

    Center for Composite Materials, University of Delaware, Newark, DE 19711, United States;

    Department of Civil and Environmental Engineering, University of Delaware, Newark, DE 19711, United States,Center for Composite Materials, University of Delaware, Newark, DE 19711, United States,Department of Materials Science and Engineering, University of Delaware, Newark, DE 19711, United States;

  • 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

    confined compression; through-thickness crush; mohr-coulomb criteria; S-2 glass/SC15; composites;

    机译：密闭压缩;通过厚度挤压;摩尔-库仑标准;S-2玻璃/ SC15;复合材料;

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