This study explores the shape-morphing behavior of 4D-printed structures made from Polylactic Acid (PLA), a prominent bio-sourced shape-memory polymer. Focusing on the response of these structures to thermal stimuli, this research investigates how various printing parameters influence their morphing capabilities. The experimental approach integrates design and slicing, printing using fused deposition modeling (FDM), and a post-printing activation phase in a controlled laboratory environment. This process aims to replicate the external stimuli that induce shape morphing, highlighting the dynamic potential of 4D printing. Utilizing Taguchi’s Design of Experiments (DoE), this study examines the effects of printing speed, layer height, layer width, nozzle temperature, bed temperature, and activation temperature on the morphing behavior. The analysis includes precise measurements of deformation parameters, providing a comprehensive understanding of the morphing process. Regression models demonstrate strong correlations with observed data, suggesting their effectiveness in predicting responses based on control parameters. Additionally, finite element analysis (FEA) modeling successfully predicts the performance of these structures, validating its application as a design tool in 4D printing. This research contributes to the understanding of 4D printing dynamics and offers insights for optimizing printing processes to harness the full potential of shape-morphing materials. It sets a foundation for future research, particularly in exploring the relationship between printing parameters and the functional capabilities of 4D-printed structures.
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This study aims to provide an in-depth characterization of the intelligent behaviour exhibited by structures fabricated using fused deposition modelling (FDM) printing technology. The primary objective is to understand the variability in the shape-morphing behaviour of additively manufactured PLA structures. A comprehensive analysis is conducted to shed light on the impact of various factors on shape transformation, encompassing both working and printing parameters. To establish the relationship between the printing and working parameters with the shape morphing characteristics, the experimental procedure employs Taguchi's method design of experiments. Notably, the study quantitatively reveals the extent of these parameters' impact on the characteristics.
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Leipzig-based German media theorist Annekatherin Kohout has written a ‚cultural studies’ history of the nerd figure. Nerds, Eine Popkulturgeschichte was published in 2022 by C.H. Beck in Munich. I was drawn to this study as I’ve been surrounded by nerds, geeks and programmers that have been building and maintaining my dear medium, the internet, over the past three decades. To my surprise, the study does not take us to hackathons, Discord channels or the Chaos Computer Congress. Instead, it looks at the visual representation of this techno-figure in mainstream media such as film and television. Maybe that’s something to be proud of. From now on, nerds also have their own pop culture history. In my worldview, Hollywood screenwriters and television directors remain clueless about clumsy cyberculture and have mainly produced caricatures. But that’s not Kohouts take. For her, the representation of nerds in pop culture is key if we want to get a better understanding of the dynamics of mainstreaming digital culture.
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