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.
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.
Thinking about care in the organization of an ecology is central to the interdisciplinary research group Care Ecologies; found during a lockdown in the spring of 2021 and hosted by ARIAS Platform for Research Through the Arts and Sciences in Amsterdam. In Towards Becoming an Ecology of Care group members Valentina Curandi, Inte Gloerich, Ania Molenda, Maaike Muntinga, Natalia Sanchez Querubin, Nienke Scholts and Marloeke van der Vlugt, offer an initial articulation on their approaches and principles – performative practices, reflection, speculations - of what an ecology of care could be. While each bringing in different understandings of care, staying with those differences shaped the ways in which the agenda of the research group has been (un)settled. To exchange knowledge and experiences, the group uses various on- and off-line frameworks, like presentations and practice sessions. Exploring how activities that sustain a research group – coordinating, meeting, writing and documenting – may be done with care, this paper attempts to present a speculative proposition for functioning as a research ecology on and around care. Bringing into focus what care can do, while being attentive to what is neglected. This is not only done in writing but also becomes visible in the accompanying images compiled of material and immaterial memories. It is an ongoing process, for which the writing of this paper became a catalyst for reflection. While not aiming for clear answers the authors invite themselves and others to become more aware, devising and testing work strategies for care-based practices.
