Design and Characterization of Single Beam for Latching Electrothermal Microswitch

This paper presents the design, fabrication and characterization of single beam for latching electrothermal microswitch. This microswitch consists of two cantilever beams using bimorph electrothermal actuator with mechanical latching for performing low power bistable relay applications. A stable state can be acquired without continuous power which is only needed to switch between two stable states of the microactuator. The single beam is discussed mainly to judge the possibility of realizing the designed function. First, reasonable shape of the resistance is designed using finite element analysis software ANSYS. Then, mechanical performance was characterized by WYKO NT1100 optical profiling system, the tip deflection of single beam can meet the designed demand.

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Design and Characterization of Microscale Auxetic and Anisotropic Structures Fabricated by Multiphoton Lithography

Nanomaterials ◽

10.3390/nano11020446 ◽

2021 ◽

Vol 11 (2) ◽

pp. 446

Author(s):

Ioannis Spanos ◽

Zacharias Vangelatos ◽

Costas Grigoropoulos ◽

Maria Farsari

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Mechanical Performance ◽

Element Analysis ◽

Mechanical Responses ◽

Multiphoton Lithography ◽

Anisotropic Structures ◽

Scanning Electron

The need for control of the elastic properties of architected materials has been accentuated due to the advances in modelling and characterization. Among the plethora of unconventional mechanical responses, controlled anisotropy and auxeticity have been promulgated as a new avenue in bioengineering applications. This paper aims to delineate the mechanical performance of characteristic auxetic and anisotropic designs fabricated by multiphoton lithography. Through finite element analysis the distinct responses of representative topologies are conveyed. In addition, nanoindentation experiments observed in-situ through scanning electron microscopy enable the validation of the modeling and the observation of the anisotropic or auxetic phenomena. Our results herald how these categories of architected materials can be investigated at the microscale.

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Mechanical Properties of a One-Way Beam String Structure with the Cooperation of the Supporting Structure

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.163-167.701 ◽

2010 ◽

Vol 163-167 ◽

pp. 701-707

Author(s):

Yun Jing Nie ◽

Tie Ying Li

Keyword(s):

Mechanical Properties ◽

Analysis Software ◽

Element Analysis ◽

Single Beam ◽

Supporting Structure ◽

Practical Project ◽

The Finite Element Analysis ◽

String Structure ◽

The One ◽

Load Conditions

In this paper, taking a practical project for the study, using the finite element analysis software ANSYS, static analyses under different load conditions are performed on a single beam string structure (BSS) and a one-way beam string structure with the cooperation of the supporting structure, respectively. Moreover, influence of factors on mechanical properties of the one-way BSS with the cooperation of the supporting structure is investigated. The factors include grouting, support form, corrosion. The results can provide a reference for design and construction of the same type of structure.

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Fabrication and characterization of magnetostrictive cantilever beams for magnetic actuation

Proceedings 2007 IEEE SoutheastCon ◽

10.1109/secon.2007.342974 ◽

2007 ◽

Author(s):

Chinwendu Enyioha ◽

Bethanie Stadler ◽

Rajneeta Basantkumar

Keyword(s):

Cantilever Beams ◽

Magnetic Actuation ◽

Fabrication And Characterization

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Fabrication and characterization of AlN-based flexible piezoelectric pressure sensor integrated into an implantable artificial pancreas

Scientific Reports ◽

10.1038/s41598-019-53713-1 ◽

2019 ◽

Vol 9 (1) ◽

Cited By ~ 4

Author(s):

M. A. Signore ◽

G. Rescio ◽

C. De Pascali ◽

V. Iacovacci ◽

P. Dario ◽

...

Keyword(s):

Pressure Sensor ◽

Artificial Pancreas ◽

Operating Conditions ◽

Piezoelectric Response ◽

Diabetic Patients ◽

Element Analysis ◽

External Power Source ◽

Fabrication And Characterization ◽

Piezoelectric Pressure Sensor

AbstractThis study reports on the fabrication and characterization of an event detection subsystem composed of a flexible piezoelectric pressure sensor and the electronic interface to be integrated into an implantable artificial pancreas (IAP) for diabetic patients. The developed sensor is made of an AlN layer, sandwiched between two Ti electrodes, sputtered on Kapton substrate, with a preferential orientation along c-axis which guarantees the best piezoelectric response. The IAP is made of an intestinal wall-interfaced refilling module, able to dock an ingestible insulin capsule. A linearly actuated needle punches the duodenum tissue and then the PDMS capsule to transfer the insulin to an implanted reservoir. The device is located at the connection of the needle with the linear actuator to reliably detect the occurred punching of the insulin-filled capsule. Finite Element Analysis (FEA) simulations were performed to evaluate the piezoelectric charge generated for increasing loads in the range of interest, applied on both the sensor full-area and footprint area of the Hamilton needle used for the capsule punching. The sensor-interface circuit was simulated to estimate the output voltage that can be obtained in real operating conditions. The characterization results confirmed a high device sensitivity during the punching, in the low forces (0–4 N) and low actuator speed (2–3 mm/s) ranges of interest, meeting the requirement of the research objective. The choice of a piezoelectric pressure sensor is particularly strategic in the medical field due to the request of self-powered implantable devices which do not need any external power source to output a signal and harvest energy from natural sources around the patient.

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A Novel Experimental Method and its Numerical Simulation for the Bi-Stable Anti-Symmetric Composite Shell

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.562-564.439 ◽

2012 ◽

Vol 562-564 ◽

pp. 439-442 ◽

Cited By ~ 2

Author(s):

He Long Wu ◽

Zheng Zhang ◽

Yu Mei Bao ◽

Hua Ping Wu

Keyword(s):

Experimental Method ◽

Composite Shell ◽

Stable State ◽

Analysis Software ◽

Element Analysis ◽

Experimental Platform ◽

Loading Method ◽

The Finite Element Analysis ◽

Future Work ◽

Bending Loading

Based on the discussion of the current research methods about the bi-stable composite shell, a novel experimental method named four points bending loading is presented to provide driving moments to snap an anti-symmetric bi-stable composite shell from one stable state to another. Then, the feasibility of this new method was confirmed using the finite element analysis software ABAQUS. Finally, the future work, which is to construct an experimental platform according the four points bending loading method, is pointed out.

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