scholarly journals An experimental validation of a new shape optimization technique for piezoelectric harvesting cantilever beams

2021 ◽  
Vol 60 (1) ◽  
pp. 1751-1766
Author(s):  
Khaled Mohamed ◽  
Hassan Elgamal ◽  
Sallam A. Kouritem
Keyword(s):  
Shape Optimization ◽  
Experimental Validation ◽  
Optimization Technique ◽  
Cantilever Beams

OPTIMUM DESIGN OF CANTILEVERED MICROPROBES FOR INSPECTING LCD PANELS AND MEASUREMENT OF CONTACTING FORCES

2010 ◽  
Vol 24 (15n16) ◽  
pp. 2429-2434 ◽  
Author(s):  
CHEOL KIM ◽  
KWANG-JOONG KIM
Keyword(s):  
Shape Optimization ◽  
Optimum Design ◽  
Measuring Equipment ◽  
Optimization Technique ◽  
Experimental Results ◽  
Design Requirement ◽  
Fine Pitch ◽  
Mems Fabrication ◽  
Topology And Shape Optimization ◽  
Design Requirements

Fine pitch microprobe arrays are microneedle-like probes for inspecting the pixels of LCD panels or IC. They are usually made of multi-layers of metallic, nonmetallic, or combination of the two. The design requirement for a contacting force is less than 2 gf and a deflection should be less than 100 µm. Many microprobe shapes satisfying the design requirements are possible. A cantilever-type microprobe having many needles was chosen and optimized in this study. Several candidate shapes were chosen using topology and shape optimization technique subjected to design requirements. Then, the microprobe arrays were fabricated using the process applied for MEMS fabrication and they were made of BeNi , BeCu , or Si . The contact probing forces and deflections were measured for checking the results from optimum design by newly developed measuring equipment in our laboratory. Numerical and experimental results were compared and both showed a good correlation.

scholarly journals On the Second-Order Shape Derivative of the Kohn-Vogelius Objective Functional Using the Velocity Method

2015 ◽  
Vol 2015 ◽  
pp. 1-10
Author(s):  
Jerico B. Bacani ◽  
Julius Fergy T. Rabago
Keyword(s):  
Free Boundary ◽  
Shape Optimization ◽  
Optimization Technique ◽  
Velocity Fields ◽  
Second Order ◽  
Shape Derivative ◽  
State Variables ◽  
Derivatives Of ◽  
Objective Functional ◽  
Perturbation Of Identity

The exterior Bernoulli free boundary problem was studied via shape optimization technique. The problem was reformulated into the minimization of the so-called Kohn-Vogelius objective functional, where two state variables involved satisfy two boundary value problems, separately. The paper focused on solving the second-order shape derivative of the objective functional using the velocity method with nonautonomous velocity fields. This work confirms the classical results of Delfour and Zolésio in relating shape derivatives of functionals using velocity method and perturbation of identity technique.

Optimization of Contact Problem by Genetic Algorithm Method

2011 ◽  
Vol 105-107 ◽  
pp. 386-391 ◽  
Author(s):  
Jan Szweda ◽  
Zdenek Poruba
Keyword(s):  
Genetic Algorithm ◽  
Contact Problem ◽  
Shape Optimization ◽  
Optimization Problem ◽  
Optimization Technique ◽  
Contact Problems ◽  
Global Optimum ◽  
Genetic Algorithm Method ◽  
Characteristic Features ◽  
Contact Shape

In this paper is discussed the way of suitable numerical solution of contact shape optimization problem. The first part of the paper is focused on method of global optimization field among which the genetic algorithm is chosen for computer processing and for application on contact problem optimization. The brief description of this method is done with emphasis of its characteristic features. The experiment performed on plane structural problem validates the ability of genetic algorithm in search the area of the global optimum. On the base of the research described in this work, it is possible to recommend optimization technique of genetic algorithm to use for shape optimization of engineering contact problems in which it is possible for any shape to achieve successful convergence of contact task solution.

Development of Shape Optimization Technique Based on The Basis Vector Method

1995 ◽  
Author(s):  
Junichi Fukushima ◽  
Yoshiaki Kobayashi ◽  
Mikio Nakamura ◽  
Yasuhiko Otsubo ◽  
Keisuke Kurumatani
Keyword(s):  
Shape Optimization ◽  
Optimization Technique ◽  
Basis Vector ◽  
Vector Method

scholarly journals Shape optimization of the X0-specimen: theory, numerical simulation and experimental verification

2020 ◽  
Vol 66 (6) ◽  
pp. 1275-1291
Author(s):  
Jan Liedmann ◽  
Steffen Gerke ◽  
Franz-Joseph Barthold ◽  
Michael Brünig
Keyword(s):  
Shape Optimization ◽  
Experimental Verification ◽  
Optimization Technique ◽  
Image Correlation ◽  
Correlation Technique ◽  
Damage And Fracture ◽  
State Dependent ◽  
Gradient Based ◽  
Stress States ◽  
Critical Regions

AbstractThe paper deals with the gradient based shape optimization of the biaxial X0-specimen, which has been introduced and examined in various papers, under producibility restrictions and the related experimental verification. The original, engineering based design of the X0-specimen has been applied successfully to different loading conditions persisting the question if relevant stress states could be reached by optimizing the geometry. Specimens with the initial as well as with the two load case dependent optimized geometries have been fabricated of the aluminum alloy sheets (AlSi1MgMn; EN AW 6082-T6) and tested. The strain fields in critical regions of the specimens have been recorded by digital image correlation technique. In addition, scanning electron microscope analysis of the fracture surfaces clearly indicate the stress state dependent damage processes. Consequently, the presented gradient based optimization technique facilitated significant improvements to study the damage and fracture processes in a more purposeful way.

Modal analysis and shape optimization of rotating cantilever beams

2006 ◽  
Vol 290 (1-2) ◽  
pp. 223-241 ◽  
Author(s):  
Hong Hee Yoo ◽  
Jung Eun Cho ◽  
Jintai Chung
Keyword(s):  
Shape Optimization ◽  
Modal Analysis ◽  
Cantilever Beams
Sign in / Sign up

Export Citation Format

Share Document