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Full-Text Articles in Engineering
In-Situ Monitoring Of Additive Manufacturing Using Digital Image Correlation, Martina Jani
In-Situ Monitoring Of Additive Manufacturing Using Digital Image Correlation, Martina Jani
Doctoral Dissertations and Master's Theses
Advances in additive manufacturing over the past decade have led to applications in multiple fields. In particular, additive manufacturing answers the need for high flexibility in designing complex structures, however, the rapid thermal fluctuations during processing lead to numerous defects and processing-induced residual stresses. In this research, an in-situ approach using Digital Image Correlation (DIC) is developed to monitor the deformation during the processing, and thereby analyze the formation of defects and residual stresses. DIC is a visual technique that compares the changes in speckle pattern in consecutive images of a specimen to determine the displacements and strains. This research …
Kinematics Of Inter-Ply Interfaces In Composite Manufacturing, Sandeep Chava
Kinematics Of Inter-Ply Interfaces In Composite Manufacturing, Sandeep Chava
Doctoral Dissertations and Master's Theses
The ubiquitous usage of polymer matrix composites in many applications demands a comprehensive understanding of composite interfaces and processing induced residual stresses, which critically affect both the manufacturing processes and the deformation mechanisms. Processing induced residual stresses are often responsible for causing warping, delamination, and dimensional instability in composite structures. This research includes new in-situ experimental approaches, cure cycle design, interface modification, and thermomechanical modeling for developing a fundamental understanding of the cure kinetics during composite manufacturing. Strains, ply-movement, and formation of defects are observed in-situ using digital image correlation (DIC) during the autoclave cure cycle for the first time. …