The performance and prediction ability of advanced approach to ductile fracture

The present paper deals with the modelling of ductile fracture which is the result of severe plastic deformation under monotonic loading. It can be the result of a crash or accident or introduced intentionally. There is a need of increasing the safety in many fields of industrial sector or transportation. The aluminium alloy 2024-T351 is widely used for studies of ductile fracture. The material was supplied as a cold-rolled plate for this study and examined within a broad range of stress states. First of all, the flow curve was determined using the standard tensile test of smooth cylindrical bar. Then, the tensile tests of variously notched cylindrical bars were conducted to show the pressure dependence. The tensile and torsion tests of notched tube were added in order to document the dependency on the deviatoric stress state. Finally, the compression test of smooth cylinder was executed. Then, deviatoric stress state dependent plasticity and the original ductile fracture hyperbolic criterion were calibrated. The damage accumulation nonlinearity was examined through loading–unloading experiments. The double damage curve approach, inspired by the fatigue life prediction, was revisited and calibrated using the semi-cyclic testing. Finally, the softening effect was studied aiming to couple the damage with plasticity. The performance and prediction ability was verified after the model was completely calibrated and implemented into the Abaqus finite element software. Three different cases of tension were chosen for this comparative purpose. The tension of notched cylindrical and tubular specimens and flat specimen. The ductile fracture criterion coupled with plasticity should provide the slant fracture in the conditions of plane strain due to localization. Nevertheless, it is shown that the proposed approach has still some drawbacks in prediction of the crack propagation

Kapcsolati stratégia és értékteremtés az üzleti piacokon

Az üzleti kapcsolatok iránt megélénkülő figyelem az értékkoncepció előtérbe kerülésével hozható összefüggésbe. A paradigmaváltás alapját a kapcsolatokból az eladók és a vevők számára nyerhető többletérték jelenti, amelynek realizálása azonban szervezeten belül is megköveteli a kapcsolati magatartás érvényesítését. Jelen cikk a kulcsfolyamatok mentén haladva mutat rá a belső és a külső kapcsolatmenedzsment összefüggéseire. Kiemeli az interakciós és kommunikációs folyamatok integrálásának értékteremtésben játszott szerepét, az ehhez szükséges szemléletbeli változásokat, valamint az ezt elősegítő menedzsmenttechnikákat

R+D-MARKETING INTEGRATION IN THE NEW PRODUCT DEVELOPMENT PROCESS

The requirement of quick accommodation to dynamic changes strengthens the role of knowledge flow in interfunctional relations. The requirement of integrated knowledge is the most explicit in the relations of R+D and marketing, researchers are increasingly aware of its key role in innovation. The integration of R+D and marketing - the interface problem - is a decisive field in current international innovation researches; particularly its role in the development of new product is in the limelight. The issue of integration is complex, the possibility and necessity to connect knowledge elements are influenced by a wide range of external and organizational factors. There is close relation between integration and the strategic behavior of companies. The goal of theoretical researches is to reveal the causes of integration niche in order to create efficient and productive interface

The marketing of research and development at the University

Innovation is the main microeconomic motive for economic development. In the course of innovation, research plays an important role at several stages. Almost 75\% of the research units belongs to higher education; therefore the extent to which the R and D activity at the university can reach the business sphere and to improve its competitiveness is very important. For successful performance on the market it is necessary to develop a suitable business philosophy and organise activities according to this `guideline´ in the case of knowledge production, too. In the R and D at the university, asserting the marketing philosophy and acquiring the skills of marketing management is the right way to improve considerably the competitiveness of innovations at the university and increase economic returns. In this article the current R and D marketing approach of TUB is discussed and a possible marketing mix is also presented

QUALITY: EU'S TOP PRIORITY. CAN HUNGARY PROFIT FROM TRADE LIBERALIZATION?

The road to Hungary's EU membership leads through a period of intense preparatory work, which means that Hungary's economic performance is to be enhanced in order to benefit from the advantages of integration and also to minimize drawbacks. This is a particularly important component of successful performance in the field of foreign trade as export is considered a major driving force in increasing Hungary's economic output. Therefore, the success of our modernization scheme is of primary importance in terms of Hungary's ability to grasp the opportunity of easier access to foreign markets. Marketability is dependent on competitiveness, which is in turn dependent on quality, another key factor. If Hungarian companies fall short of fulfilling the quality requirements of the European markets which have standardized norms, these companies will then be unable to profit from the chances offuture access to European markets and will lose ground even on the domestic market as a consequence of higher-quality imported products. During the period of preparation of Hungarian economic integration, special emphasis should be laid on quality-related issues. In order to achieve this an active participation by the state (i.e. acceptance of European standards and technical regulations, creation of accreditation and certification system in accordance with EU norms) and company compliance with the international economic environment are absolutely necessary

WHY SHOULD COMPANIES AND UNIVERSITIES CO-OPERATE IN R and D? - THE MARKETING FUNDAMENTALS

In our rapidly changing technological environment, universities of technology have been playing a different game from roughly the second half of the 20th century. Innovation policies of the developed countries assign special importance to university-industry relations, because both the scientific and the industrial domain can profit of such co-operation. Although the marketing tools are not yet integral parts of the Hungarian universities´ management, a marketing approach to university R and D can support successful university-industry links. If we focus on the university´s knowledge product (i.e. marketable university R and D), taking the marketing point of view it can provide an insight to understand why companies and universities should co-operate and harmonise their R and D actions. Market for the university´s knowledge product is somewhat different as compared with ordinary product markets or the industrial market in general. Adopting customer orientation and using the tools provided by integrated marketing, the companies and the universities can equally harvest the fruits of co-operation. Findings of the present study are supported by empirical evidence from the Budapest University of Technology and Economics, but the conclusions are relevant and useful for facilitating any change management, which is now very important in Central and Eastern Europe

The Informativeness Of Cash Flow Forecasts And The Regulation FD Environment

Prior literature shows that analysts’ forecast estimates serve as a proxy for the markets’ and investors’ beliefs which are unobservable. For decades, analysts have generated forecasts for use in valuation models including future estimates of earnings and growth. Yet, only recently, analysts have begun to voluntarily provide cash flow per share forecasts at the same time they are producing earnings per share forecasts for firms they follow. This study addresses whether the tendency of analysts to issue cash flow per share forecasts, as a result of changes in the regulatory environment, affects forecast properties. By examining the time frame surrounding Regulation FD, the analysis provides evidence that both the mere existence and the relative measure of analysts’ cash flow per share forecasts differ in explaining analysts’ earnings forecast accuracy. Specifically, the empirical results demonstrate that the relative value of analysts’ cash flow forecasts, the implied value of unexpected accruals, and cash flow forecast errors facilitate the reduction in analysts’ earnings forecast errors subsequent to the passage of Regulation FD. Further, the inverse relation between these analysts’ inputs and earnings forecast errors appear to be driven by firms with more accurate cash flow forecasts