Application of multifactorial experiment in the process of direct extrusion was analysed. The aim was to determine the dependence of direct extrusion force on elements of the processing regime and characteristics of material by good planning of experiment and by application of regression and dispersion analysis.

The service life of the rocket motor is largely based on structural considerations. Service life prediction is based on the data obtained from tests of mechanical properties and some enviromentaly experienced cosequences. Materials characterization plays a key role in predicting service live. The primary causes for propellant degradation are slow chemical reactions, the gases these reactions produce and environment stresses placed on the materials. Aging of a propellant grain can result in cracking, surface hardening, modulus changes and other materials property changes. Both aging and environmental stresses can result in micro-cracking, fissuring of the propellant and de-bounding from the case or housing. In particle filled polymeric properties, aging can result in changes in particle to binder bonding (dewet strength) and binder elastic properties. These defects can result in abnormal burning rates and unsafe operation of the motor. It is essential to assess the mechanical properties in order to predict the remaining life of the propellant. In this work methods of the estimation of the service life proposed on stronger thermodynamic materials base. Influence climate, and scatter inspection date are reexamined in order to improve service life. The micromechanical model of the damage are coupled with environment factors and storage history. There are many advanced methods which can be used to manufacture a missile structure in order extend service life. The key structural component is the pressure vessel containing the solid propellant, which is subject to the most extreme physical and thermal conditions, since it needs to withstand the pressures and temperature generated during the burning phase of the propellants. Inspection and chemical analyses play a key role in determining the degree degradation.Visual, ultrasonic and X-ray inspection are needed to defect anomalies in the mechanical components. Inspection and chemical analyses play a key role in determine the degree of degradation. The mechanism of the moisture-related degradation are also required for some vital rocket engine components.

The characteristics of thread for cotton knitwear making are described. The meaning and significance of knitwear softening, specific quality in technological process of knitting wear sewing are observed. By changing the measuring system it is possible to establish very precisely the piercing force of sewing needle, which is significantly with the knitwear ladder damage and the quality of clothes making. Three kinds of a 100% cotton knitwear depending of knitting cultivation, kind and concentration of softener, fineness of sewing needle and thread, number of layers, the possibility of lowering and correction of piercing needle in the sewing process of knitting wear is examined.

Imajuci u vidu da svaka tehnologija ima određeni tehno ekonomski vijek trajanja, to namece potrebu intenzivnog istraživanja i mogucnosti supstitucije postojecih neproduktivnih tehnologija kroz razvoj i primjenu reviteliziranih i novih tehnologija. supstitucija konvencionalnih i neproduktivnih tehnologija uvjetuje,s jedne strane razvoj modeliranja,simulacije,umjetne inteligencije i modela optimizacije,kao i druge metode u cilju revitalzacije postojecih tehnologija i s druge strane,istraživanja i razvoj novih metoda i tehnologija obrade,kao i primjenu poznatih visokih tehnologija koje se koriste u tehnoloski razvijenim zemljama, uz odgovarajucu optimizaciju i diseminaciju.Osnovna ideja rada sastoji se u tome da se primjenom revitalizacije i modernizacije smanjuju tekuci troskovi proizvodnje po jedinici proizvoda.