1
|
Muthulingam J, Padmanaban AG, Singh NK, Bacha TW, Stanzione JF, Haas FM, Jha R, Lee JH, Koohbor B. Molecular Weight Controls Interactions between Plastic Deformation and Fracture in Cold Spray of Glassy Polymers. ACS OMEGA 2023; 8:3956-3970. [PMID: 36743048 PMCID: PMC9893447 DOI: 10.1021/acsomega.2c06617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Accepted: 12/21/2022] [Indexed: 06/18/2023]
Abstract
Polymer cold spray has gained considerable attention as a novel manufacturing process. A promising aspect of this technology involves the ability to deposit uniform polymer coatings without the requirements of solvent and/or high-temperature conditions. The present study investigates the interplay between shear instability, often considered to be the primary mechanism for bond formation, and fracture, as a secondary energy dissipation mechanism, collectively governing the deposition of glassy thermoplastics on similar and dissimilar substrates. A hybrid experimental-computational approach is utilized to explore the simultaneous effects of several interconnected phenomena, namely the particle-substrate relative deformability, molecular weights, and the resultant yielding versus fracture of polystyrene particles, examined herein as a model material system. The computational investigations are based on constitutive plasticity and damage equations determined and calibrated based on a statistical data mining approach applied to a wide collection of previously reported stress-strain and failure data. Results obtained herein demonstrate that the underlying adhesion mechanisms depend strongly on the molecular weight of the sprayed particles. It is also shown that although the plastic deformation and shear instability are still the primary bond formation mechanisms, the molecular-weight-dependent fracture of the sprayed glassy polymers is also a considerable phenomenon capable of significantly affecting the deposition process, especially in cases involving the cold spray of soft thermoplastics on hard substrates. The strong interplay between molecular-weight-dependent plastic yielding and fracture in the examined system emphasizes the importance of molecular weight as a critical variable in the cold spray of glassy polymers, also highlighting the possibility of process optimization by proper feedstock selection.
Collapse
Affiliation(s)
- Jeeva Muthulingam
- Department
of Mechanical Engineering, Rowan University, Glassboro, New Jersey08028, United States
| | - Anuraag Gangineri Padmanaban
- Department
of Mechanical and Industrial Engineering, University of Massachusetts, Amherst, Massachusetts01003, United States
| | - Nand K. Singh
- Department
of Mechanical Engineering, Rowan University, Glassboro, New Jersey08028, United States
- Advanced
Materials and Manufacturing Institute, Rowan
University, Glassboro, New Jersey08028, United States
| | - Tristan W. Bacha
- Department
of Chemical Engineering, Rowan University, Glassboro, New Jersey08028, United States
- Advanced
Materials and Manufacturing Institute, Rowan
University, Glassboro, New Jersey08028, United States
| | - Joseph F. Stanzione
- Department
of Chemical Engineering, Rowan University, Glassboro, New Jersey08028, United States
- Advanced
Materials and Manufacturing Institute, Rowan
University, Glassboro, New Jersey08028, United States
| | - Francis M. Haas
- Department
of Mechanical Engineering, Rowan University, Glassboro, New Jersey08028, United States
- Advanced
Materials and Manufacturing Institute, Rowan
University, Glassboro, New Jersey08028, United States
| | - Ratneshwar Jha
- Department
of Mechanical Engineering, Rowan University, Glassboro, New Jersey08028, United States
- Advanced
Materials and Manufacturing Institute, Rowan
University, Glassboro, New Jersey08028, United States
| | - Jae-Hwang Lee
- Department
of Mechanical and Industrial Engineering, University of Massachusetts, Amherst, Massachusetts01003, United States
| | - Behrad Koohbor
- Department
of Mechanical Engineering, Rowan University, Glassboro, New Jersey08028, United States
- Advanced
Materials and Manufacturing Institute, Rowan
University, Glassboro, New Jersey08028, United States
| |
Collapse
|
2
|
Shan W, Xiao K, Thomas EL. Influence of Entanglements on Ultrahigh Strain Rate Deformation of Polystyrene Microprojectiles. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c01728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Wenpeng Shan
- Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Kailu Xiao
- Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Edwin L. Thomas
- Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77843, United States
| |
Collapse
|