Author
Benliang Zhu
Other affiliations: Kyoto University, University of Oldenburg
Bio: Benliang Zhu is an academic researcher from South China University of Technology. The author has contributed to research in topics: Topology optimization & Compliant mechanism. The author has an hindex of 18, co-authored 76 publications receiving 987 citations. Previous affiliations of Benliang Zhu include Kyoto University & University of Oldenburg.
Papers
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TL;DR: In this article, a numerical method to analyze the large deflection and stress of the CCM considering beam-to-beam contacts is presented, and the static equilibrium configuration of CCMs is solved by minimizing its potential energy function under the geometric constraints from the boundary curves of contacts.
25 citations
TL;DR: This study designs robust bistable mechanisms with maximized differences between the reaction forces at the desired critical points using topology optimization using additive hyperelasticity technique to ensure the convergence of the nonlinear finite element problems.
24 citations
TL;DR: In this article, a nonlinear method for analyzing the deformation of general beams that contact rigid surfaces in compliant mechanisms is presented. But the method is limited to the case of straight or curved beams.
Abstract:
The nonlinear analysis and design of contact-aided compliant mechanisms (CCMs) are challenging. This paper presents a nonlinear method for analyzing the deformation of general beams that contact rigid surfaces in CCMs. The large deflection of the general beam is modeled by using the chained pseudo-rigid-body model. A geometry constraint from the contact surface is developed to constrain the beam’s deformed configuration. The contact analysis problem is formulated based on the principle of minimum potential energy and solved using an optimization algorithm. Besides, a novel technique based on the principle of work and energy is proposed to calculate the reaction force/moment of displacement-loaded cases. Several analysis examples of the compliant mechanisms with straight or curved beams are used to verify the proposed method. The results show that the proposed method and technique can evaluate the deformation of beam-based CCMs and the reaction force/moment with acceptable accuracy, respectively.
23 citations
TL;DR: In this paper, a new level set-based multi-objective optimization method is proposed for topological design of hinge-free compliant mechanisms, where the flexibility requirement of compliant mechanisms is formulated by using the mutual energy.
Abstract: A new level set-based multi-objective optimization method is proposed for topological design of hinge-free compliant mechanisms. Firstly, the flexibility requirement of compliant mechanisms is formulated by using the mutual energy. Two types of mean compliance are developed to meet the stiffness requirement. Secondly, several objective functions are developed for designing hinge-free compliant mechanisms based on the weighting method in which a new scheme for determining weighting factors is used. Thirdly, several numerical examples are performed to demonstrate the validity of the proposed method. It is shown that the resulting compliant mechanism configurations contain only strip-like members which are suitable for generating distributed compliance and decreasing stress concentration.
22 citations
TL;DR: The output characteristics of piezoresistive pressure sensors are shown to be substantially affected by not only the environmental temperature but also the residual stresses from the fabrication and packing processes.
Abstract: The effects of temperature on the output performance of piezoresistive pressure sensors are studied in this paper. The influences of the environmental temperature, the residual stress due to the fabrication process, and the residual stress due to the packaging on the piezoresistive coefficient and resistance are theoretically investigated. The simulation results are obtained via finite element analysis through ANSYS. The results of experimental studies performed on piezoresistive pressure sensors fabricated using MEMS techniques are reported to verify the simulation results. The output characteristics of piezoresistive pressure sensors are shown to be substantially affected by not only the environmental temperature but also the residual stresses from the fabrication and packing processes.
21 citations
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TL;DR: In this article, the authors highlight the recent advances in buckling-induced smart applications and explain why buckling responses have certain advantages and are especially suitable for these particular applications, and identify potential research avenues and emerging trends for using buckling and other elastic instabilities for future innovations.
Abstract: A paradigm shift has emerged over the last decade pointing to an exciting research area dealing with the harnessing of elastic structural instabilities for ‘smart’ purposes in a variety of venues. Among the different types of unstable responses, buckling is a phenomenon that has been known for centuries, and yet it is generally avoided through special design modifications. Increasing interest in the design of smart devices and mechanical systems has identified buckling and postbuckling response as a favorable behavior. The objective of this topical review is to showcase the recent advances in buckling-induced smart applications and to explain why buckling responses have certain advantages and are especially suitable for these particular applications. Interesting prototypes in terms of structural forms and material uses associated with these applications are summarized. Finally, this review identifies potential research avenues and emerging trends for using buckling and other elastic instabilities for future innovations.
273 citations
254 citations
TL;DR: It is shown that in the research of topology optimization for additive manufacturing, the integration of material, structure, process and performance is important to pursue high-performance, multi-functional and lightweight production.
224 citations