系所成員 Faculty and Staff

Name 張元榕 Yuan-Jung (Dan) Chang
Title 助理教授
Education 威斯康辛大學麥迪遜分校 機械工程學系 博士
Office Phone TBD
Office TBD
Email look64392gmail.com
Division 能源熱流組
Research Expertise 計算流體力學、非牛頓流體力學/流變學
高分子加工與成型模擬
微細發泡成型模擬
塑膠光學元件光彈條紋模擬
流動導致殘餘應力與非等向性的預測
威斯康辛大學麥迪遜分校 (UW–Madison) 機械工程 博士 (2020.1-2023.7)
國立清華大學 動力機械工程學系 碩士 (2003.9-2005.6)
國立清華大學 動力機械工程學系 學士 (1999.9-2003.6)
Senior Manager, CoreTech System (Moldex3D), 2023 – 2026
Technical Manager, Moldex3D, 2018 – 2023
Division Manager, Moldex3D, 2014 – 2018
Software Engineer/Program Manager, Moldex3D, 2005 – 2014
 
  • Aoki Katashi Innovation Award (「青木 固」技術賞), Japan Society of Polymer Processing (JSPP), 2019

Journal Papers

  1. Y. J. Chang, R. Y. Chang, and T. A. Osswald, “Modeling and simulation of bulk viscoelasticity for amorphous polymers in injection molding,” Phys. Fluids, 35, 053109 (2023). 
  2. Y. J. Chang, R. Y. Chang, and T. A. Osswald, “Measurement and modeling of bulk viscosity for polystyrene melts,” Phys. Fluids, 33, 073103 (2021). 
  3. P. H. Foss, H. C. Tseng, J. Snawerdt, Y. J. Chang, W. H. Yang, and C. H. Hsu, “Prediction of fiber orientation distribution in injection molded parts using Moldex3D simulation,” Polymer Composites, 35(4), 671-680 (2014). 
  4. C. H. Hsu, Y. J. Chang, M. Goto, H. Tanaka, and H. Akimoto, "気泡核生成を組み込んだ微細射出発泡成形シミュレーション技術の開発," Seikei-Kakou (成形加工), 31(10), 390-393 (2019). (In Japanese)
  5. T. Y. Shiu, Y. J. Chang, C. T. Huang, C. H. Hus, R. Y. Chang, S. S. Hwang, and H. Tanaka, “微細射出発泡成形品の発泡形態の三次元シミュレーション,” Seikei-Kakou (成形加工), 25(9), 411-415 (2013). (In Japanese)

Issued Patents

1. US Patent No. 10,940,623 – Molding System for Preparing Molding Article (2021)
 

Book Chapters

  1. T. C. Chang, R. Y. Chang, C. C. Hsu, H. C. Tseng, and Y. J. Chang, “Polymer Processing Simulation,” in T. A. Osswald and A. J. Román (eds.), Understanding Polymer Processing: Processes and Governing Equations, Hanser, 2024.
  1. Y. J. Chang, L. Y. Chang, and C. W. Wang, “Foam Injection Molding,” in M. L. Wang, R. Y. Chang, and C. H. Hsu (eds.), Molding Simulation: Theory and Practice, Hanser, 202


Conference Papers

  1. J. Mendes-Lopes, S. Guazzotti, M. Cheng, M. Schlich, E. Carbajal, C. H. Chen, Y. J. Chang, Y. C. Chen, and H. S. Chiu, “Modeling stress birefringence and STOP analysis for injection molded polymer AR/VR systems,” SPIE Photonics West, March 2025.
  2. Y. J. Chang, R. J. Jhang, H.-S. Chiu, and R. Y. Chang, “Viscoelastic flow simulation of jet buckling in injection molding,” SPE ANTEC (Society of Plastics Engineers – Annual Technical Conference), 2019.
  3. G. Lin, D. L. Lai, C. T. Huang, C. C. Wang, Y. J. Chang, and R. Y. Chang, “Numerical Simulation for the Viscoelastic Effects on the Birefringence Variation for an Injected Optical Lens,” SPE ANTEC, 2016.
  4. H. C. Tseng, Y. J. Chang, C. H. Tien, and C. H. Hsu, “Black line prediction for metal injection molding via powder concentration,” Proceedings of the 2014 World Congress on Powder Metallurgy and Particulate Materials, 2014.
  5. K. H. Lee, S. C. Chen, Y. L. Tseng, Y. J. Chang, T. C. Wang, and W. H. Yang, “The gas counter pressure effect on the carbon fiber orientation distribution study in injection molding,” SPE ANTEC, 2014.
  6. H. C. Tseng, Y. J. Chang, C. H. Tien, and C. H. Hsu, “Prediction of powder concentration for filling simulation of metal injection molding,” SPE ANTEC, 2014.
  7. H. C. Tseng, T. C. Wang, Y. J. Chang, C. H. Hsu, and R. Y. Chang, “Progress on fiber concentration for injection molding simulation of fiber reinforced thermoplastics,” SPE ANTEC, 2014
  8. H. C. Tseng, Y. J. Chang, C. H. Hsu, and R. Y. Chang, “Prediction of fiber microstructure for injection molding: orientation, degradation and concentration,” SPE ACCE (Annual Automotive Composites Conference and Exhibition), 2014.
  9. T. Y. Shiu, Y. J. Chang, C. T. Huang, C. H. Hsu, R. Y. Chang, and S. S. Hwang, “Foaming Morphology of Microcellular Injection Molded Parts - Simulation and Experimental Characterization,” SPE ANTEC, 2013.
  10. H. C. Tseng, Y. J. Chang, T. C. Wang, C. H. Hsu, and R. Y. Chang, “Three Dimensional Predictions of Fiber Orientation for Injection Molding of Long Fiber Reinforced Thermoplastics,” SPE ACCE, 2013.
  11. T. C. Wang, Y. K. Lin, Y. J. Chang, H. S. Chiu, C. H. Hsu, S. C. Tseng, “Using iterative fluid-structure interaction solution to simulate core deflection problems in injection molding,” SPE ANTEC, 2013.
  12. T. Y .Shiu, Y. J. Chang, C. T. Huang, C. H. Hsu, R. Y. Chang, “Dynamic Behavior and Experimental Validation of Cell Nucleation and Growing Mechanism in Microcellular Injection Molding Process,” SPE ANTEC, 2012.
  13. H. C. Tseng, Y. J. Chang, T. C. Wang, C. H. Hsu, and R. Y. Chang, “Prediction of Orientation Distribution for Long Fiber Reinforced Thermoplastics in Center‐Gated Disk Flow,” SPE ANTEC, 2012.
  14. T. C. Chen, H. S. Chiu, Y. J. Chang, C. T. Huang, M. T. Kao, S. C. Tseng, and R. Y. Chang, “The Injection Compression Effects on the Optical Property Behavior for Injection Parts,” SPE ANTEC, 2011.
  15. S. C. Chen, Y. Chang, P. S. Hsu, S. W. Huang, Y. J. Chang, C. T. Huang, “Simulation on the part warpage and photoelastic stress when molding discontinuous-thickness-variation parts combined with differential mold cooling,” SPE ANTEC, 2011.
  16. H. C. Tseng, Y. J. Chang, C. H. Hsu, and R. Y. Chang, “An Improved Folgar–Tucker Model for Transient Behavior of Orientation Kinetics in Fiber Suspension,” SPE ANTEC, 2011.
  17. M. C. Chen, C. T. Huang, Y. J. Chang, S. C. Tseng, T. Y. Wu, and C. J. Wang, “The warpage and optical property influenced by the process-induced property variation in multi-component molding,” SPE ANTEC, 2010.
  18. Y. Y. Chou, Y. J. Chang, and A. J. Giacomin, “Melt Memory and Core Deflection,” SPE ANTEC, 2009.
  19. Y. J. Chang, C. K. Yu, H. S. Chiu, W. H. Yang, H. E. Lai, and P. J. Wang, “Simulations and Verifications of True 3D Optical Parts by Injection Molding Process,” SPE ANTEC, 2009.
  20. Y. T. Liao, S. C. Tseng, M. C. Chen, C. T. Huang, and Y. J. Chang, “A study of thermally and flow induced residual stresses in injection molding,” SPE ANTEC, 2009.
  21. C. T. Huang, M. C. Chen, Y. J. Chang, W. L. Yang, S. C. Tseng, H. Y. Chang, “Optical property investigation in sequential multi-component molding,” SPE ANTEC, 2008.
  22. R. Y. Chang, Y. J. Chang, W. H. Yang, and C. H. Hsu, “True 3D Simulation of Flow-induced Residual Stress in Injection Molding,” SPE ANTEC, 2007
  23. Y. J. Chang, H. S. Chiu, W. H. Yang, and R. Y. Chang, “A novel approach for predicting birefringence of optical parts,” SPE ANTEC, 2007
  24. W. Yang, D. Chang, V. Yang, P. Chang, S. Hwang, “True 3D numerical simulation for micro injection molding,” SPE ANTEC, 2006.
  25. S. L. Lee, and Y. J. Chang, “Flow Around a Rising Clean Microbubble in a Vertical Square Tube,” Heat Transfer Summer Conference, 2007.