0263-8223/$ see front matter 2009 Elsevier Ltd. A doi:10.1016/j.compstruct.2009.01.006 * Corresponding author. Tel.: +1 514 690 4151; fax E-mail address: [email protected] (H. Designing an optimized composite laminate requires finding the minimum number of layers, and the best fiber orientation and thickness for each layer. To date, several optimization methods have been introduced ...

Abstract This paper demonstrates a stacking sequence optimisation process of composite aircraft wing skin. A two-stage approach is employed to satisfy all sizing requirements this industrial sized, medium altitude, long endurance drone. In the first stage optimisation, generic stacks are used describe thickness and stiffness properties structure while considering both structural discrete guidel...

Abstract This paper describes a novel method developed for the optimization of composite components against distortion caused by cure-induced residual stresses. A ply stack alteration algorithm is described, which coupled to parametrized CAD/FE model used optimization. Elastic strain energy in 1D spring elements, constrain structure during analysis, serves as an objective function incorporating...

High level ab initio methods have been used to study stacking interactions in ten unique base pair steps both in A-RNA and in B-DNA duplexes. The protocol for selection of geometries based on molecular dynamics (MD) simulations is proposed, and its suitability is demonstrated by comparison with stacking in steps at fiber diffraction geometries. It is shown that fiber diffraction geometries are ...

most impact tests are carried out on specimens with specific stacking sequence and dimensions to meet standard and experimental limitations. the damaged areas and the resulted reduction in the strength values of specimens may not agree very well with those of real application. in this paper an attempt is made to study the variation in the size of damaged areas due to varying the dimension of te...

Copyright © 2002, Idea Group Publishing. Currently, the combination of several classifiers is one of the most active fields within inductive learning. Examples of such techniques are boosting, bagging and stacking. From these three techniques, stacking is perhaps the least used one. One of the main reasons for this relates to the difficulty to define and parameterize its components: selecting w...

well-known seismic design codes have offered an alternative equivalent static procedure for practical purposes instead of verifying design trials with complicated step-y-step dynamic analyses. such a pattern of base-shear distribution over the building height will enforce its special stiffness and strength distribution which is not necessarily best suited for seismic design. the present study, ...