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材料工程  2020, Vol. 48 Issue (10): 88-95    DOI: 10.11868/j.issn.1001-4381.2020.000150
  研究论文 本期目录 | 过刊浏览 | 高级检索 |
二次注射成型光学制件厚度截面的残余应力分析
葛勇, 王博伦, 相宁, 王韬, 孙琦伟, 颜悦
北京航空材料研究院 北京市先进运载系统结构透明件工程技术研究中心, 北京 100095
Residual stress analysis in cross section of optical parts by co-injection molding
GE Yong, WANG Bo-lun, XIANG Ning, WANG Tao, SUN Qi-wei, YAN Yue
Beijing Engineering Research Centre of Advanced Structural Transparencies for the Modern Traffic System, AECC Beijing Institute of Aeronautical Materials, Beijing 100095, China
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摘要 采用光弹法定量对比分析一次注射成型与二次注射成型光学制件在厚度截面上的残余应力。结果表明,一次注射成型和二次注射成型光学制件的截面残余应力分布均为双抛物线状,但后者的应力水平大于前者。同时,二次注射成型的PC/PC和PMMA/PMMA在界面处两侧的低应力层和零应力层消失,相反地,两层的界面处存在高应力峰。另外,与PMMA或PMMA/PMMA的双抛物线应力分布截然不同,PC/PMMA和PMMA/PC复合制件的PMMA层的残余应力表现为沿PMMA外侧面向界面方向逐渐增大的趋势。此外,PC和PMMA的注射顺序对二次注射成型复合制件的残余应力具有显著影响,主要体现在界面处和整个PC层。PC/PMMA的界面处应力明显高于PMMA/PC,且前者PC层靠近界面处仍存在低应力层和零应力层,而后者不存在此两种应力层。
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葛勇
王博伦
相宁
王韬
孙琦伟
颜悦
关键词 二次注射成型聚碳酸酯聚甲基丙烯酸甲酯厚度截面残余应力    
Abstract:The residual stresses measured by photo-elastic method in cross section along the thickness direction of optical parts were compared quantitatively between injection molding and co-injection molding. The results show that the residual stress distributions of both injection molded slices and co-injection molded slices are double-parabolic shape, however, the latter has a higher stress level than that of the former. Besides, PC/PC and PMMA/PMMA disks by co-injection molding have no low-stress layer or zero-stress layer on both sides of the interface, on the contrary, there is a high stress peak at the interface. The stress in the PMMA layer of both PC/PMMA and PMMA/PC slices is increased gradually along the side surface toward the interface, which is different from the double-parabolic shape distribution of PMMA and PMMA/PMMA slices. The injection sequence of PC and PMMA layers has remarkable influence on the residual stress at the interface and in the PC layer of co-injection molded composite disks. The residual stress at the interface of PC/PMMA slices is significantly higher than that of PMMA/PC slices, and there still exists low stress layer and zero stress layer near the interface in the PC layer of PC/PMMA slices, while there are no such two stress layers in PMMA/PC slices.
Key wordsco-injection molding    polycarbonate    polymethylmethacrylate    cross section    residual stress
收稿日期: 2020-02-24      出版日期: 2020-10-17
中图分类号:  TQ320.66  
通讯作者: 颜悦(1966-),男,研究员,博士研究生,主要从事航空透明材料研究与应用,联系地址:北京市81信箱83分箱(100095),E-mail:Yue.yan@biam.ac.cn     E-mail: Yue.yan@biam.ac.cn
引用本文:   
葛勇, 王博伦, 相宁, 王韬, 孙琦伟, 颜悦. 二次注射成型光学制件厚度截面的残余应力分析[J]. 材料工程, 2020, 48(10): 88-95.
GE Yong, WANG Bo-lun, XIANG Ning, WANG Tao, SUN Qi-wei, YAN Yue. Residual stress analysis in cross section of optical parts by co-injection molding. Journal of Materials Engineering, 2020, 48(10): 88-95.
链接本文:  
http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2020.000150      或      http://jme.biam.ac.cn/CN/Y2020/V48/I10/88
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