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Effects of low and high temperatures on tensile behavior of adhesively-bonded GFRP joints

机译：低温和高温对GFRP粘结接头拉伸性能的影响

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摘要

The tensile behavior of adhesively-bonded double-lap joints composed of pultruded glass fiber-reinforced adherends and an epoxy adhesive was investigated under temperatures ranging between -35 ℃ and 60 ℃. The load-elongation response was influenced primarily by the thermomechanical behavior of the adhesive and much less so by that of the adherends. For temperatures above the adhesive glass transition temperature, strength and stiffness decreased with the former being less affected than the latter. The failure mechanism changed with increasing temperature from fiber-tear to adhesive failure. The crack initiation loads were unaffected as long as the temperature remained below the adhesive glass transition temperature. However, the crack propagation rate was higher at low temperatures. Critical strain energy release rates for crack initiation and propagation consistently rose as temperature increased. Modeling results obtained using existing empirical models and FEA compared well to the experimental data in the examined temperature range.
机译：研究了由拉挤玻璃纤维增​​强被粘物和环氧胶粘剂组成的胶粘双搭接接头在-35℃至60℃的温度范围内的拉伸性能。载荷-伸长响应主要受粘合剂的热机械行为影响，受粘合物的热力学行为影响较小。对于高于粘合玻璃化转变温度的温度，强度和刚度降低，前者的影响小于后者。失效机理随着温度的升高而从纤维撕裂变为粘合失效。只要温度保持低于粘合玻璃化转变温度，裂纹​​萌生载荷就不会受到影响。但是，在低温下裂纹扩展速率较高。随着温度的升高，裂纹萌生和扩展的临界应变能释放速率持续提高。使用现有的经验模型和有限元分析获得的建模结果与所检查温度范围内的实验数据进行了很好的比较。

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  • 来源
    《Composite Structures》 |2010年第7期|p.1631-1639|共9页
  • 作者

    Ye Zhang; Anastasios P. Vassilopoulos; Thomas Keller;

  • 作者单位

    Composite Construction Laboratory (CCLab), Ecole Polytechnique Federale de Lausanne (EPFL), Station 16, Batiment BP, CH-1015 Lausanne, Switzerland;

    Composite Construction Laboratory (CCLab), Ecole Polytechnique Federale de Lausanne (EPFL), Station 16, Batiment BP, CH-1015 Lausanne, Switzerland;

    Composite Construction Laboratory (CCLab), Ecole Polytechnique Federale de Lausanne (EPFL), Station 16, Batiment BP, CH-1015 Lausanne, Switzerland;

  • 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

    adhesive bonding; fiber-reinforced polymers; joints; temperature effects; thermomechanical response;

    机译：粘接纤维增强聚合物;关节温度影响热力学响应;

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