Bending behaviors of 3D-printed Bi-material structure: Experimental study and finite element analysis

Kao, Yi-Tang; Zhang, Ying; Wang, Jyhwen; Tai, Bruce L.

doi:10.1016/j.addma.2017.06.005

Cited by 18 publications

(8 citation statements)

References 33 publications

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“…The material properties are shown in Table 2. The inclusion volume fraction f inc is defined by (32). In the different simulations, the following features are noted.…”

Section: Numerical Examplesmentioning

confidence: 99%

“…With the quick development of 3D printing and additive manufacturing techniques [46], new technological solutions which were not possible a few years ago can now be considered, like on-demand geometries of multi-materials structures and microstructures. More specifically, 3D printed bi-materials [7,[30][31][32]63] offer new exciting possibilities such as designing composites with non-trivial periodic microstructures and ad-hoc functionalities. Among them, particle-matrix or skeleton-filled matrix composites able to increase the fracture resistance as compared to existing composites is of industrial and technological critical importance, for applications in aircraft, automotive or biomechanics, among many others.…”

Section: Introductionmentioning

confidence: 99%

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A SIMP-phase field topology optimization framework to maximize quasi-brittle fracture resistance of 2D and 3D composites

Yvonnet

2021

Theoretical and Applied Fracture Mechanics

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We investigate the use of combining SIMP topology optimization and phase field method to fracture for maximizing the fracture resistance of a structure composed of two materials. The optimization problem is formulated with respect to maximizing the external work under the constraint of inclusion volume fraction. The performance and convergence of the proposed algorithm are investigated. It is shown that the fracture resistance can be improved as compared to several guess designs with the same volume fraction of reinforcement (inclusion material). A comparison between the present SIMP and BESO methods is performed, showing a better convergence of the SIMP method, more specifically when a homogeneous initial guess design is used. Applications to 2D and 3D composite structure are presented to show the potential and robustness of the approach.

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“…The material properties are shown in Table 2. The inclusion volume fraction f inc is defined by (32). In the different simulations, the following features are noted.…”

Section: Numerical Examplesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A SIMP-phase field topology optimization framework to maximize quasi-brittle fracture resistance of 2D and 3D composites

Yvonnet

2021

Theoretical and Applied Fracture Mechanics

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“…Based on Yeoh's second-order constitutive model of silica gel material for the pneumatic soft-bodied bionic actuator, the rationality of structural design and motion forms and the accuracy of the theoretical model of deformation analysis are verified by the numerical simulation algorithm [ 39 – 41 ]. The calculation results obtained from the numerical simulation algorithm are shown in Figure 6 .…”

Section: Numerical Simulation Algorithm Verification and Physical mentioning

confidence: 99%

Development and Performance Analysis of Pneumatic Soft-Bodied Bionic Actuator

Zhao

Wang

2021

Applied Bionics and Biomechanics

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The design of a pneumatic soft-bodied bionic actuator derives from the structural characteristics and motion mechanism of biological muscles, combined with the nonlinear hyperelasticity of silica gel, which can improve the mobility and environmental adaptability of soft-bodied bionic robots. Based on Yeoh’s second-order constitutive model of silica gel, the deformation analysis model of the actuator is established, and the rationality of the structure design and motion forms of the actuator and the accuracy of the deformation analysis model are verified by using the numerical simulation algorithm. According to the physical model of the pneumatic soft-bodied bionic actuator, the motion and dynamic characteristics of the actuator are tested and analyzed, the curves of motion and dynamic characteristics of the actuator are obtained, and the empirical formula of the bending angle and driving torque of the actuator is fitted out. The results show that the deformation analysis model and numerical simulation method are accurate, and the pneumatic soft-bodied bionic actuator is feasible and effective, which can provide a design method and reference basis for the research and implementation of soft-bodied bionic robot actuator.

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“…Structural Parameters e combination of structural dimension parameters plays a key role in the motion and dynamic characteristics of the pneumatic soft-bodied bionic basic execution unit. To shorten the experimental research period and reduce experimental cost, the optimal combination of structural parameters is studied based on the response surface analysis method [30][31][32][33][34] and numerical simulation algorithm [35][36][37][38]. According to the design principle of the Box-Behnken central composite experiment, the maximum bending angle Φ is used for determining the optimum extraction process.…”

Section: Optimal Combination Ofmentioning

confidence: 99%

Development and Performance Analysis of Pneumatic Soft-Bodied Bionic Basic Execution Unit

Zeng

Zhao

Wang

et al. 2020

Journal of Robotics

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This paper studies the design of pneumatic soft-bodied bionic basic execution unit with soft-rigid combination, which can be used as an actuator for pneumatic soft-bodied robots and soft-bodied manipulators. This study is inspired by structural characteristics and motion mechanism of biological muscles, combined with the nonlinear hyperelasticity of silica gel and the insertion of thin leaf spring structure in the nonretractable layer. Response surface analysis and numerical simulation algorithm are used to determine the optimal combination of structural dimension parameters by taking the maximum output bending angle of the basic executing unit as the optimization objective. Based on Odgen’s third-order constitutive model, the deformation analysis model of the basic execution unit is established. The physical model of pneumatic soft-bodied bionic basic execution unit is prepared through 3D printing, shape deposition, soft lithography, and other processing methods. Finally, the motion and dynamic characteristics of the physical model are tested through experiments and result analysis, thus obtaining curves and empirical formulas describing the motion and dynamic characteristics of the basic execution unit. The relevant errors are compared with the deformation analysis model of the execution unit to verify the feasibility and effectiveness of the design of the pneumatic soft-bodied bionic basic execution unit. The above research methods, research process, and results can provide a reference for the research and implementation of pneumatic and hydraulic driven soft-bodied robots and grasping actuators of soft-bodied manipulators.

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Bending behaviors of 3D-printed Bi-material structure: Experimental study and finite element analysis

Cited by 18 publications

References 33 publications

A SIMP-phase field topology optimization framework to maximize quasi-brittle fracture resistance of 2D and 3D composites

A SIMP-phase field topology optimization framework to maximize quasi-brittle fracture resistance of 2D and 3D composites

Development and Performance Analysis of Pneumatic Soft-Bodied Bionic Actuator

Development and Performance Analysis of Pneumatic Soft-Bodied Bionic Basic Execution Unit

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