Multiobjective Approach Toward Optimized Patch Repairs of Blisk Blades

In recent years, the concept of a centralized drainage system that connect an entire city to one single treatment plant is increasingly being questioned in terms of the costs, reliability, and environmental impacts. This study introduces an optimization approach based on decentralization in order to develop a cost-effective and sustainable sewage collection system. For this purpose, a new algorithm based on the growing spanning tree algorithm is developed for decentralized layout generation and treatment plant allocation. The trade-off between construction and operation costs, resilience, and the degree of centralization is a multiobjective problem that consists of two subproblems: the layout of the networks and the hydraulic design. The innovative characteristics of the proposed framework are that layout and hydraulic designs are solved simultaneously, three objectives are optimized together, and the entire problem solving process is self-adaptive. The model is then applied to a real case study. The results show that finding an optimum degree of centralization could reduce not only the network’s costs by 17.3%, but could also increase its structural resilience significantly compared to fully centralized networks.

Lowering Thermal Residual Stresses in Composite Patch Repairs in Metallic Aircraft Structure

AIAA Journal ◽

10.2514/2.1194 ◽

2001 ◽

Vol 39 (10) ◽

pp. 2013-2018 ◽

Cited By ~ 5

Author(s):

J. Cho ◽

C. T. Sun

Keyword(s):

Residual Stresses ◽

Aircraft Structure ◽

Composite Patch ◽

Thermal Residual Stresses ◽

Patch Repairs

Multiobjective Approach for Optimal Design of Layered Plates Against Penetration of Strikers

Mechanics Based Design of Structures and Machines ◽

10.1080/15397734.2012.717868 ◽

2013 ◽

Vol 41 (2) ◽

pp. 189-201 ◽

Cited By ~ 4

Author(s):

N. V. Banichuk ◽

S. Y. Ivanova ◽

F. Ragnedda ◽

M. Serra

Keyword(s):

Optimal Design ◽

Layered Plates ◽

Multiobjective Approach

General Method for Optimizing Composite Patch Repairs

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1120-1121.670 ◽

2015 ◽

Vol 1120-1121 ◽

pp. 670-674

Author(s):

Abdelmadjid Ait Yala ◽

Abderrahmanne Akkouche

Keyword(s):

Mechanical Properties ◽

Stress Intensity Factor ◽

Stress Intensity ◽

Intensity Factor ◽

Optimization Problem ◽

Composite Patch ◽

Matlab Program ◽

Patch Repairs ◽

Selection Of ◽

General Method

The aim of this work is to define a general method for the optimization of composite patch repairing. Fracture mechanics theory shows that the stress intensity factor tends towards an asymptotic limit K∞.This limit is given by Rose’s formula and is a function of the thicknesses and mechanical properties of the cracked plate, the composite patch and the adhesive. The proposed approach consists in considering this limit as an objective function that needs to be minimized. In deed lowering this asymptote will reduce the values of the stress intensity factor hence optimize the repair. However to be effective this robust design must satisfy the stiffness ratio criteria. The resolution of this double objective optimization problem with Matlab program allowed us determine the appropriate geometric and mechanical properties that allow the optimum design; that is the selection of the adhesive, the patch and their respective thicknesses.

Thermodynamic Properties Calculation of Pure Compounds Using a Multiobjective Approach in Estimating the Adjustable Empirical Parameters of the GEOS3C Equation of State

10.26678/abcm.cobem2021.cob2021-0218 ◽

2021 ◽

Author(s):

Géssica Ramos da Silva ◽

Tania Galo ◽

Nélio Henderson ◽

Acir Moreno Soares Jr.

Keyword(s):

Equation Of State ◽

Thermodynamic Properties ◽

Pure Compounds ◽

Multiobjective Approach

User-Centric Multiobjective Approach to Privacy Preservation and Energy Cost Minimization in Smart Home

IEEE Systems Journal ◽

10.1109/jsyst.2018.2876345 ◽

2019 ◽

Vol 13 (1) ◽

pp. 1030-1041 ◽

Cited By ~ 13

Author(s):

Hsuan-Hao Chang ◽

Wei-Yu Chiu ◽

Hongjian Sun ◽

Chia-Ming Chen

Keyword(s):

Energy Cost ◽

Smart Home ◽

Privacy Preservation ◽

Cost Minimization ◽

Multiobjective Approach ◽

User Centric