Erratum

Genetic characterization of grape (Vitis vinifera L.) germplasm from Southeast Anatolia by SSR markersVitis 50 (3), 99-106 (2011

Genetic characterization of grape (Vitis vinifera L.) germplasm from Southeast Anatolia by SSR markers

Southeast Anatolia is located in close proximity to the center of origin of grapes and is an important grape producing area of Turkey. The important location of this region for grape genetic diversity together with its diverse ecological conditions may have led to the development of grape germplasm that is unique to this region. However, so far little has been done to genetically analyze this grape germplasm. In this study, we genetically analyzed 55 grape cultivars originating from six different provinces of this region using 14 simple sequence repeat (SSR) loci and a number of ampeolographic characteristics. Based on these analyses, one case of synonymous and four cases of homonymous grape cultivars were identified. The contribution of our results to better characterization of the grape germplasm of the region as well as future germplasm management and breeding efforts is discussed.

Finite element analysis of longitudinal debonding between fibre and matrix interface

43-48In this paper, a numerical model developed for the analysis of a cylindrical element of matrix containing a single fibre is presented. A ring-shaped crack is assumed at the interface of fibre and matrix. Both layers in the model are bonded perfectly with the exception of the crack faces. Contact elements, which have bonded feature, are used between fibre and matrix. Displacement correlation method is used to calculate opening-mode and sliding-mode stress intensity factors. These results obtained from the analysis help to understand the debonding phenomenon between fibre and matrix interface

A numerical model for calculation of stress intensity factors in particle-reinforced metal-matrix composites

A two-dimensional finite element model was developed to study effects of particle diameter, mechanical properties of the fiber and matrix materials and loading conditions (Mode 1 and Mixed-Mode). A theoretical model was proposed to calculate the stress intensity factor for an interface crack in Particle-Reinforced Metal-Matrix Composites. The displacement Correlation Method was used to calculate the stress intensity factors K 1 and K 2. In the present model the fiber and matrix materials were modeled in linear elastic conditions. The interface crack was considered between the fiber and matrix, without the presence of the interphase. Obtained results show that the key role on the stress intensity factors played by the relative elastic properties of the fiber and matrix. The results also show that K 1 and absolute K 2 values increase for both Mode 1 and mixed-mode loading condition once Young's modulus of the fiber material increases. The values of K 1 and K 2 stress intensity factors decrease when the fiber volume fraction increases for Mode 1 loading. © Springer Science+Business Media, Inc. 2007

Hibritleştirmenin nano takviyeli hibrit kompozit plakaların balistik darbe davranışlarına etkisi

Hybrid composites are the material group largely preferred for use in space, aerospace and ballistic applications, where superior mechanical strength and low density are required. Hybrid composites are produced using high strength Kevlar and S-glass fiber as reinforcement material. Three different nano-particle, nano-clay, nano-calcite and nano-carbon, were used in order to increase the ballistic impact performance of hybrid composite plates. The nano-particles were added into the epoxy resin–hardener mixture in 0.5, 1, 1.5 and 2 (wt.%) ratios. The hybridization was performed by combining the plates produced with different matrix materials. After the tests, the deflection values on the back surface of the material were measured and the presence of perforation in the material was evaluated. As a result of the study, it has been observed that the ballistic properties are affected from the changing of the laminates stacking sequence and ballistic strength of the material can be increased by the addition of nano-particle. In hybrids composites produced by the addition of Sglass, ballistic strength was reduced, although the weight was reduced by 20%. It was found that nano-calcites adding hybrid composite plates at the front sites and nano-clay added plates at the back sites showed superior ballistic performance. © 2020, TUBITAK. All rights reserved.114M762 Türkiye Bilimsel ve Teknolojik Araştirma Kurumu, TÜBITAKThe authors gratefully acknowledge The Scientific and Technological Research Council of Turkey (TÜBİTAK) for the financial support 114M762 Projec