Fatigue crack growth is examined in P/M 2124 aluminum alloys reinforced with SiC particles (SiCp) and whiskers (SiCw) over a wide spectrum of growth rates from 10 to 10 m per cycle. Effects of aging treatment, orientation of crack growth direction with respect to the rolling direction, mean stress (or stress ratio), and reinforcement volume percent on the fatigue crack growth threshold are inve...

temper rolling or skin pass rolling is one of cold rolling processes composed of a horizontal pass cold rolling mill stand. in this process, the thick strip is subjected to very light reduction (0.5–4%) in thickness in the presence of high friction amplitudes. one of the basic parameters of strip rolling processes is temper rolling force. a new rolling force model has been proposed for temper r...

Snow and ice on roads often lead to increased rolling resistance that makes less accessible attractive for cyclists. Introducing a minimum requirement in winter maintenance of cycleways may increase the attractiveness cycling. To control level, an objective measurement method is needed. This article presents new measuring cyclists by using instrumented bicycle. The utilizes measurements pedalin...

The aim of our research was to design and construct a measuring device that can determine the rolling resistance coefficient (RRC) under laboratory conditions. has drum arrangement, RRC measured on two different model surfaces. deceleration method used investigate dependence compression force, velocity, surface temperature steel rubber values (0.010 – 0.025) were similar in magnitude characteri...