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A Smoothed Particle Hydrodynamics (SPH) Procedure for Simulating Cold Spray Process - an Additive Manufacturing Process without Heat Supply

Gnanasekaran, Balachander
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1544099572854187

Abstract Details

2018, MS, University of Cincinnati, Engineering and Applied Science: Engineering Mechanics.
Cold spray process has been of great interest in coating and additive manufacturing due to its advantage of not needing heat. The process of cold spray generally uses particles of diameters 10&microm to 50&microm traveling at velocities of 300m/s to 1200m/s, and thus it takes place at very small time and length scales. It becomes difficult to observe experimentally. Numerical studies have been made to simulate the cold spray process using finite element methods, Eulerian grid methods and mesh-free methods such as Smoothed Particle Hydrodynamics(SPH). The feature of SPH to model large deformation well poses an important advantage for its usage in the simulation of cold spray process, and hence it is adopted in this study. The SPH procedure also includes failure modeling for particle impacts. The impact of particles of different sizes and at different angles are studied. It was found that larger particles had greater bonding ability and an impact angle between 80&deg and 90&deg is conducive for bonding. An increase in maximum effective plastic strain is seen which causes thermal softening leading to plastic flow of material. This fluid-like flow causes adherence of the particle on the substrate. Finally, the in-house SPH procedure is extended to simulate three-dimensional cold spray problems with multiple particles, enabling much more realistic simulations for actual cold spray processes.
Gui-Rong Liu, Ph.D. (Committee Chair)
Yao Fu (Committee Member)
Mark Turner, Sc.D. (Committee Member)
118 p.
Aerospace Materials
Smoothed Particle Hydrodynamics; Cold spray process; Additive manufacturing; High velocity impact

Recommended Citations

Citations

  • Gnanasekaran, B. (2018). A Smoothed Particle Hydrodynamics (SPH) Procedure for Simulating Cold Spray Process - an Additive Manufacturing Process without Heat Supply [Master's thesis, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1544099572854187

    APA Style (7th edition)

  • Gnanasekaran, Balachander. A Smoothed Particle Hydrodynamics (SPH) Procedure for Simulating Cold Spray Process - an Additive Manufacturing Process without Heat Supply. 2018. University of Cincinnati, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1544099572854187.

    MLA Style (8th edition)

  • Gnanasekaran, Balachander. "A Smoothed Particle Hydrodynamics (SPH) Procedure for Simulating Cold Spray Process - an Additive Manufacturing Process without Heat Supply." Master's thesis, University of Cincinnati, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1544099572854187

    Chicago Manual of Style (17th edition)

ucin1544099572854187
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This open access ETD is published by University of Cincinnati and OhioLINK.