Search

In this study, a probabilistic analysis of the critical velocity for an axially moving cracked elastic and isotropic plate is presented. Axially moving materials are commonly used in modelling of manufacturing processes, like paper making and plastic forming. In such systems, the most serious threats to runnability are instability and material fracture, and finding the critical value of velocity is essential for efficiency. In this paper, a formula for the critical velocity is derived under constraints for the probabilities of instability and fracture. The significance of randomness in different model parameters is investigated for parameter ranges typical of paper material and paper machines. The results suggest that the most significant factors are variations in the crack length and tension magnitude. [ABSTRACT FROM AUTHOR]

Abstract: This study investigated the utilization of resin impregnated decorative and overlay paper wastes obtained from the edge trimming of partially cured, dried papers as a binder in the manufacture of the light medium density fiberboard (MDF). The light MDF panels were prepared from various mixtures of the softwood fiber and hammer-milled impregnated paper waste, 95/5, 90/10, and 80/20wt%. The results of the experiments showed that the dimensional stability and mechanical properties of the light MDF panels were improved by adding hammer-milled melamine impregnated paper waste. The resin impregnated paper waste could be evaluated as a binder for the manufacturing of the light MDF panels having better dimensional stability and mechanical properties than standard light MDF panels used in interior applications. [Copyright &y& Elsevier]