ETD system

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Tesi etd-11062012-091430


Thesis type
Tesi di laurea specialistica
Author
PAMPANA, FABIO
URN
etd-11062012-091430
Title
Optimum tailoring of pre-stresses in statically indeterminate structures to increase damage tolerance
Struttura
INGEGNERIA
Corso di studi
INGEGNERIA AEROSPAZIALE
Supervisors
relatore Prof. Chiarelli, Mario Rosario
Parole chiave
  • tolleranza al danno
  • damage tolerance
  • ottimizzazione strutturale
  • pre-stresses
  • structural optimization
Data inizio appello
27/11/2012;
Consultabilità
Parziale
Data di rilascio
27/11/2052
Riassunto analitico
The possibility of increasing the load carrying capability of damaged 2D trusses is investigated, using a tailored set of pre-stresses. An optimization problem, with pre-stresses being the design variables, and modulus of the load applied to the structure being the objective function to be maximed is formulated and solved using standard gradient-based methods and gradient-less methods. Optimizations are made for different damage scenario. Optimum set of pre-stresses are found to increase the load carrying capability of the structure. Volume redistribution of material is taken into consideration, considering the areas of the truss members as additional variables. Results are compared and optimum solutions effectiveness on damage scenario they were not tailored for is analyzed.
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