caa a22 4500 44587807X CHVBK 20180317145533.0 cr unu---uuuuu 170323e20110301xx s 000 0 eng 10.1007/s11081-010-9116-0 doi (NATIONALLICENCE)springer-10.1007/s11081-010-9116-0 Optimization of composite patch repair processes withtheuse of genetic algorithms [Elektronische Daten] [Theodosios Papathanassiou, Sotirios Filopoulos, George Tsamasphyros] The aim of this contribution is the optimization of some parameters of the composite patch repair technique (CPR). This technique is mainly used by the aircraft industry, as it offers high reliability, short repair times and reduced cost in compare to other methods, such as the riveted joints. CPR consists of adhesively bonding thin composite patches over cracked or corroded areas with heat supply. As the polymer-matrix composite patch is heated, it cures and toughens. Proper curing insures structural reliability of the repair. Short duration curing cycles are of great importance for the aircraft availability. With the use of Genetic Algorithms, we design minimum time curing cycles. The optimization is subjected to the following constraints: (1)Maximum allowed temperature in order to avoid residual stresses, (2)Minimum temperature in order to initiate the cure reaction, (3)Sufficient degree of cure at the end of the process and (4)Maximum heat generation rate that can be achieved by the device. Our design vector contains the duration of the plateau stage of the cure cycle and the characteristic thermal profile. The degree of cure is estimated with the use of the Kamal cure rate model for thermosetting polymers. For the numerical time integration of the cure rate equation, a second order, implicit Runge-Kutta scheme is employed. Springer Science+Business Media, LLC, 2010 Composite patch repair nationallicence Adhesive bonding nationallicence Degree of cure nationallicence Geneticalgorithms nationallicence Papathanassiou Theodosios School of Applied Mathematical and Physical Sciences, Section of Theoretical and Applied Mechanics, National Technical University of Athens, 9 Iroon Polytechniou Str., Zografou Campus, 15773, Athens, Greece aut Filopoulos Sotirios School of Applied Mathematical and Physical Sciences, Section of Theoretical and Applied Mechanics, National Technical University of Athens, 9 Iroon Polytechniou Str., Zografou Campus, 15773, Athens, Greece aut Tsamasphyros George School of Applied Mathematical and Physical Sciences, Section of Theoretical and Applied Mechanics, National Technical University of Athens, 9 Iroon Polytechniou Str., Zografou Campus, 15773, Athens, Greece aut Optimization and Engineering Springer US; http://www.springer-ny.com 12/1-2(2011-03-01), 73-82 1389-4420 12:1-2<73 2011 12 11081 https://doi.org/10.1007/s11081-010-9116-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11081-010-9116-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Papathanassiou Theodosios School of Applied Mathematical and Physical Sciences, Section of Theoretical and Applied Mechanics, National Technical University of Athens, 9 Iroon Polytechniou Str., Zografou Campus, 15773, Athens, Greece aut NATIONALLICENCE 700 1- Filopoulos Sotirios School of Applied Mathematical and Physical Sciences, Section of Theoretical and Applied Mechanics, National Technical University of Athens, 9 Iroon Polytechniou Str., Zografou Campus, 15773, Athens, Greece aut NATIONALLICENCE 700 1- Tsamasphyros George School of Applied Mathematical and Physical Sciences, Section of Theoretical and Applied Mechanics, National Technical University of Athens, 9 Iroon Polytechniou Str., Zografou Campus, 15773, Athens, Greece aut NATIONALLICENCE 773 0- Optimization and Engineering Springer US; http://www.springer-ny.com 12/1-2(2011-03-01), 73-82 1389-4420 12:1-2<73 2011 12 11081 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer