Different from conventional injection molding (CIM), injection/compression molding (ICM) evolves boundary variation in gapwise direction. In order to describe melt flow characteristics in ICM correctly, a new material derivative based on arbitrary Lagrangian Eulerian (ALE) description was introduced to modify the material derivatives in the governing and constitutive equations. To avoid large amount of calculation and weak stability of integral numerical method, an iterative approach employing twofold iterations was proposed to decouple the interdependence between velocity, stress, and temperature. The initial values of material parameters in constitutive equations were obtained or fitted by rheological experiments. The ICM experiments for an iso-thick and a var-thick rectangular panel were carried out to validate the proposed method and find the special characteristics of ICM. In addition, the photoelastic tests on a quarter of spherical part processed by ICM were conducted to identify the relationship between residual flow-induced stress distributions and flow fields. Both simulations and experiments show that the pressure profile displays a plateau during compression, temperature decreases with time according to exponential law, large flow-induced stress originates in thick transitional region, flow start, and flow end areas, and gravity has significant effect on meltfront for thick part ICM. The good agreement between experiments and simulations indicates that the current method can properly describe the flow characteristics of ICM.
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September 2016
Research-Article
Three-Dimensional Viscoelastic Simulation for Injection/Compression Molding Based on Arbitrary Lagrangian Eulerian Description
Wei Cao,
Wei Cao
National Engineering Research Center of
Mold and Die,
Zhengzhou University,
Zhengzhou, Henan 450002, China
Mold and Die,
Zhengzhou University,
Zhengzhou, Henan 450002, China
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Shaozhen Hua,
Shaozhen Hua
National Engineering Research Center of
Mold and Die,
Zhengzhou University,
Zhengzhou, Henan 450002, China
Mold and Die,
Zhengzhou University,
Zhengzhou, Henan 450002, China
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Shixun Zhang,
Shixun Zhang
National Engineering Research Center of
Mold and Die,
Zhengzhou University,
Zhengzhou, Henan 450002, China
Mold and Die,
Zhengzhou University,
Zhengzhou, Henan 450002, China
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Tao Wang,
Tao Wang
Beijing Institute of Aeronautical Materials,
Beijing 100095, China
Beijing 100095, China
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Yaming Wang,
Yaming Wang
National Engineering Research Center of
Mold and Die,
Zhengzhou University,
Zhengzhou, Henan 450002, China
Mold and Die,
Zhengzhou University,
Zhengzhou, Henan 450002, China
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Haimei Li,
Haimei Li
National Engineering Research Center of
Mold and Die,
Zhengzhou University,
Zhengzhou, Henan 450002, China
Mold and Die,
Zhengzhou University,
Zhengzhou, Henan 450002, China
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Chuntai Liu,
Chuntai Liu
National Engineering Research Center of
Mold and Die,
Zhengzhou University,
Zhengzhou, Henan 450002, China
Mold and Die,
Zhengzhou University,
Zhengzhou, Henan 450002, China
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Changyu Shen
Changyu Shen
National Engineering Research Center of
Mold and Die,
Zhengzhou University,
Zhengzhou, Henan 450002, China
Mold and Die,
Zhengzhou University,
Zhengzhou, Henan 450002, China
Search for other works by this author on:
Wei Cao
National Engineering Research Center of
Mold and Die,
Zhengzhou University,
Zhengzhou, Henan 450002, China
Mold and Die,
Zhengzhou University,
Zhengzhou, Henan 450002, China
Shaozhen Hua
National Engineering Research Center of
Mold and Die,
Zhengzhou University,
Zhengzhou, Henan 450002, China
Mold and Die,
Zhengzhou University,
Zhengzhou, Henan 450002, China
Shixun Zhang
National Engineering Research Center of
Mold and Die,
Zhengzhou University,
Zhengzhou, Henan 450002, China
Mold and Die,
Zhengzhou University,
Zhengzhou, Henan 450002, China
Tao Wang
Beijing Institute of Aeronautical Materials,
Beijing 100095, China
Beijing 100095, China
Yaming Wang
National Engineering Research Center of
Mold and Die,
Zhengzhou University,
Zhengzhou, Henan 450002, China
Mold and Die,
Zhengzhou University,
Zhengzhou, Henan 450002, China
Haimei Li
National Engineering Research Center of
Mold and Die,
Zhengzhou University,
Zhengzhou, Henan 450002, China
Mold and Die,
Zhengzhou University,
Zhengzhou, Henan 450002, China
Chuntai Liu
National Engineering Research Center of
Mold and Die,
Zhengzhou University,
Zhengzhou, Henan 450002, China
Mold and Die,
Zhengzhou University,
Zhengzhou, Henan 450002, China
Changyu Shen
National Engineering Research Center of
Mold and Die,
Zhengzhou University,
Zhengzhou, Henan 450002, China
Mold and Die,
Zhengzhou University,
Zhengzhou, Henan 450002, China
Contributed by the Design Engineering Division of ASME for publication in the JOURNAL OF COMPUTATIONAL AND NONLINEAR DYNAMICS. Manuscript received May 23, 2015; final manuscript received December 27, 2015; published online February 3, 2016. Assoc. Editor: Zdravko Terze.
J. Comput. Nonlinear Dynam. Sep 2016, 11(5): 051004 (8 pages)
Published Online: February 3, 2016
Article history
Received:
May 23, 2015
Revised:
December 27, 2015
Citation
Cao, W., Hua, S., Zhang, S., Wang, T., Wang, Y., Li, H., Liu, C., and Shen, C. (February 3, 2016). "Three-Dimensional Viscoelastic Simulation for Injection/Compression Molding Based on Arbitrary Lagrangian Eulerian Description." ASME. J. Comput. Nonlinear Dynam. September 2016; 11(5): 051004. https://doi.org/10.1115/1.4032384
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