In this paper, the plates made of functionally graded material (FGM) with and without a crack are numerically simulated, employing the finite element method (FEM). The material property variations are defined to be fully continuous; therefore, the elements can be as small as required. For this purpose, variations of the material properties are applied in both the integration points and in the n...

One accepted cause that generates low mechanical strength and/or fracture properties is the presence of defects in structure material. Additive Manufacturing does not except this rule, especially powder bed fusion technologies relays on spreading through a blade or roller followed by laser sintering melting. The paper presents experimental investigations polyamide PA2200 samples obtained select...

the static strain aging is a phenomenon that can change the mechanical properties of low carbon steels. thus, the static strain aging behavior of low carbon steel wires after drawing process is studied. to do so, the wires are austenitized at different temperatures and cooled in different rates. then the wires are drawn and aged at a specific temperature and time. before and after aging of each...

The present study is focused on the characterization of fatigue damage features in carbon/epoxy laminates under mode-II loading conditions. To this aim, a sinusoidal cyclic load was applied to End-Notched Flexural (ENF) specimens and behavior investigated. Scanning Electron Microscope (SEM) used identify fracture surface, i.e. fiber imprints, cusps, roller striations. It found that features, su...

The hot compression tests were carried on X45CrNiW189 valve steel (X45) in the temperature range of 1000– 1200 °C and the strain rate range of 0.004 – 0.5 s-1 in order to study the high temperature softening behavior of this steel. For the exact prediction of flow stress, the effective stress-effective strain curves were obtained from experiments under various conditions. On the basis of experi...

ketorolac tromethamine (kt) containing microemulsion-based gels (mbgs) have been formulated, based on the previous phase diagram studies, using a pharmaceutically acceptable surfactant (soybean lecithin; epikuron 200) and oil (isopropyl myristate; ipm) and the effect of formulation variables on the release profile of the drug from mbgs through intact guinea pig skin and various artificial membr...

reaction to fire of fire-retarded rigid pur foams and two types of metal faced rigid polyurethane foam core sandwich panel was evaluated by using cone calorimeter test method. the tests were carried out in various radiative heat fluxes from 15 to 75 kw/m2. the radiation rate effect on reaction to fire parameters, including time to ignition (tti), peak of heat release rate (prhr), total heat rel...