材料工程与机械制造

基于探针试验的预浸料黏性内聚力模型

  • 舒展 ,
  • 彭啸 ,
  • 李发飞 ,
  • 徐强
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  • 浙江大学 机械工程学院 流体动力与机电系统国家重点实验室, 杭州 310027

收稿日期: 2017-05-15

  修回日期: 2017-08-07

  网络出版日期: 2017-08-07

基金资助

国家自然科学基金青年基金(11402228);中央高校基本科研业务费专项资金(2016FZA8002)

Cohesive zone model for prepreg tack based on probe test

  • SHU Zhan ,
  • PENG Xiao ,
  • LI Fafei ,
  • XU Qiang
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  • The State Key Laboratory of Fluid Power & Mechatronic Systems, School of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China

Received date: 2017-05-15

  Revised date: 2017-08-07

  Online published: 2017-08-07

Supported by

National Natural Science Foundation of China Youth Fund (11402228); the Fundamental Research Funds for the Central Universities (2016FZA8002)

摘要

以预浸料黏性为研究对象,通过探针试验,研究了预浸料铺放过程中预浸料与模具之间的脱粘失效行为及其随铺放工艺参数的变化规律。试验中发现铺放速率、压力和温度对预浸料黏性行为影响显著,且存在界面失效(低温)和内聚失效(高温)两种失效模式。针对这一现象,采用指数内聚力模型(CZM)表征了预浸料的黏性行为,利用该模型描述了不同铺放温度下粘结层应力快速上升、损伤扩展和最终失效的脱粘过程,定量地给出了黏性CZM参数与铺放工艺参数之间的关系。研究结果表明,预浸料粘结强度和特征位移均随铺放速率增加而近似线性减小,均随铺放压力增加而近似线性增大。随铺放温度的增加,黏性CZM参数先增大后减小,近似呈二次关系。为制定特定铺放条件下的铺放工艺规划提供参考。

本文引用格式

舒展 , 彭啸 , 李发飞 , 徐强 . 基于探针试验的预浸料黏性内聚力模型[J]. 航空学报, 2018 , 39(2) : 421416 -421416 . DOI: 10.7527/S1000-6893.2017.421416

Abstract

The tack behavior between prepreg and the mould during the laying process and its variation with process parameters are studied by the probe test. It is found that the laying rate, pressure and temperature have a significant effect on the tack behavior of the prepreg in the experiment, and there exist two failure modes:the interfacial failure mode (low temperature) and cohesive failure mode (high temperature). The tack behavior of prepreg is then characterized by the exponential Cohesive Zone Model (CZM), which is used to describe the debonding process of prepreg including rapid increase of stress, damage propagation and ultimate failure of bond layer at different temperatures. The quantitative relationship between the CZM parameters of prepreg tack and the laying process parameters. The results show that the bond strength and the characteristic displacement of prepreg decline nearly linearly with the growth of the laying rate, and go up nearly linearly with the rise of the laying pressure. With the growth of the laying temperature, the CZM parameters of prepreg tack increase at first and then decrease, showing approximately quadratic relationship. The result can provide some reference for laying process planning under specific laying conditions.

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