Complicated deformation simulating on temperature-driven 4D printed bilayer structures based on reduced bilayer plate model

Song, Junjie; Feng, Ying; Yong, Wang; Zeng, Siyuan; Zhang, Hong; Qiu, Hao; Tan, Jianrong

doi:10.1007/s10483-021-2788-9

Cited by 13 publications

(8 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…If the cooling is rapid, the polymer chains are forced to keep their extended state, which causes the development of internal stresses. When the 3D printed object is reheated above its glass transition temperature (Tg), the polymer chains start to rearrange, during which stress can be released, which causes shrinkage or changes in the shape of the 3D printed object [ 9 , 10 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

“…The structure printed in the FDM process that will be capable of shape transformation is printed using one or a combination of two thermoplastic materials. In the first case, the shape transformation is controlled by a different orientation of deposited filament layers of the polymer [ 10 , 11 , 12 , 13 , 14 ], the so-called active material. In the second case, it is controlled by the multi-material structure, consisting of active and passive segments.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Printing Process Parameters on the Shape Transformation Capability of 3D Printed Structures

2021

View full text Add to dashboard Cite

The aim of our research was to investigate and optimise the main 3D printing process parameters that directly or indirectly affect the shape transformation capability and to determine the optimal transformation conditions to achieve predicted extent, and accurate and reproducible transformations of 3D printed, shape-changing two-material structures based on PLA and TPU. The shape-changing structures were printed using the FDM technology. The influence of each printing parameter that affects the final printability of shape-changing structures is presented and studied. After optimising the 3D printing process parameters, the extent, accuracy and reproducibility of the shape transformation performance for four-layer structures were analysed. The shape transformation was performed in hot water at different activation temperatures. Through a careful selection of 3D printing process parameters and transformation conditions, the predicted extent, accuracy and good reproducibility of shape transformation for 3D printed structures were achieved. The accurate deposition of filaments in the layers was achieved by adjusting the printing speed, flow rate and cooling conditions of extruded filaments. The shape transformation capability of 3D printed structures with a defined shape and defined active segment dimensions was influenced by the relaxation of compressive and tensile residual stresses in deposited filaments in the printed layers of the active material and different activation temperatures of the transformation.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Printing Process Parameters on the Shape Transformation Capability of 3D Printed Structures

2021

View full text Add to dashboard Cite

show abstract

“…Our group has applied the reduced bilayer plate theory to simulate thermally actuated bilayer plates. [ 48 ] Compared with the commonly used finite‐element analysis software, this model has the advantages of stable convergence, high efficiency, and easily measured parameters. In this work, the simulating model is further upgraded for more complex situations such as a bilayer structure with varying strain principal axes.…”

Section: Methodsmentioning

confidence: 99%

“…Thus, a simulating model of 4D printed SMP bilayer structures was reported by our group based on Bartels' work, with printing parameters as model inputs, and performed well in predicting coupling deformations of the printed bilayer structures. [48] The inverse design of the 4D printed bilayer structures, namely solving the inverse problem of determining the stimulated strain in bilayer structures based on the target stimulated shape, has also aroused great interest in recent years. Rees et al established a mathematical equivalence between bilayers and curved monolayers, solving the pre-strain in an initial bilayer plate to form a target curve.…”

Section: Doi: 101002/aisy202200384mentioning

confidence: 99%

See 1 more Smart Citation

Octopus‐Inspired Adaptable Soft Grippers Based on 4D Printing: Numerical Modeling, Inverse Design, and Experimental Validation

Song

Feng

Zhang

et al. 2023

Advanced Intelligent Systems

Self Cite

View full text Add to dashboard Cite

Soft grippers based on stimuli‐responsive materials show great promise to perform safe interaction and adaptive functions in unstructured environments. Hence, improving flexibility and designability of the stimuli‐responsive soft grippers for better grasping ability are highly desired. Inspired by the biological structure of octopuses, a class of temperature‐driven polylactic acid grippers is fabricated by 4D printing in this work, which consists of two types of bilayer structures, separately imitating the web and tentacles of an octopus. Compared with the traditional pure‐bending soft grippers, the integrated structure results in a 1.5 times wider reachable area and enhanced flexibility. The complex grasping behaviors are predicted with the 4D printing parameters (i.e., printing paths and printing speeds) using the reduced bilayer plate theory. Moreover, a method for determining the printing parameters of the gripper is provided to realize the desired grasping behavior depending on different objects. The feasibility of the design method is experimentally verified by gasping three distinctive objects, including an egg, a weight, and a Metatron's cube, which is in good agreement with the simulation results. Herein, a promising strategy is provided to achieve the easy‐fabricated, low‐cost, and versatile soft graspers using smart materials.

show abstract

The Design of 4D‐Printed Hygromorphs: State‐of‐the‐Art and Future Challenges

Kergariou

Demoly

Perriman

et al. 2022

Adv Funct Materials

View full text Add to dashboard Cite

In recent years, 4D printing has allowed the rapid development of new concepts of multifunctional/adaptive structures. The 4D printing technology makes it possible to generate new shapes and/or property-changing capabilities by combining smart materials, multiphysics stimuli, and additive manufacturing. Hygromorphs constitute a specific class of new smart materials where their properties and morphing capabilities are dependent on the surrounding humidity, which drives actuation. Although multiple efforts have been made to fabricate hygromorph demonstrators, a comprehensive design process to produce hygromorphs by multiple 4D printing techniques is not yet available. The broad aim of this review and concept paper is to i) highlight existing scientific and technology gaps in the field of 4D-printed hygromorphs, ii) identify tools existing in other research fields for filling those gaps, and iii) discuss a series of guidelines for tackling future challenges and opportunities to develop 4D-printed composite hygromorph materials and related manufacturing processes. Accordingly, this review describes the materials and additive manufacturing techniques used for hygromorph composite fabrication. Moreover, the relevant parameters that control actuation, the models selection and performance, the design methods and the actuation measurements for customized 4D-printed hygromorph materials, are discussed.

show abstract

Complicated deformation simulating on temperature-driven 4D printed bilayer structures based on reduced bilayer plate model

Cited by 13 publications

References 38 publications

Effect of Printing Process Parameters on the Shape Transformation Capability of 3D Printed Structures

Effect of Printing Process Parameters on the Shape Transformation Capability of 3D Printed Structures

Octopus‐Inspired Adaptable Soft Grippers Based on 4D Printing: Numerical Modeling, Inverse Design, and Experimental Validation

The Design of 4D‐Printed Hygromorphs: State‐of‐the‐Art and Future Challenges

Contact Info

Product

Resources

About