We present a generalised phase field formulation for predicting high-cycle fatigue in metals. Different degradation functions are presented, together with new damage accumulation strategies, to account (i) typical S-N curve slope, (ii) the endurance limit, and (iii) mean stress effect. The numerical implementation exploits an efficient quasi-Newton monolithic solution strategy Virtual curves co...

The international passenger car market is undergoing a transition from vehicles with internal combustion engines to hybrid and fully electrified reduce the climate impact of transportation sector. To emphasize importance this needed change, paper provides holistic comparisons total life-cycle greenhouse gas (GHG) emissions produced by wide selection commercially available cars different powertr...

A minimum cycle basis of a weighted undirected graph G is a basis of the cycle space of G such that the total weight of the cycles in this basis is minimized. If G is a planar graph with non-negative edge weights, such a basis can be found in O(n2) time and space, where n is the size of G. We show that this is optimal if an explicit representation of the basis is required. We then present an O(...

a new mathematical model for the optimal production isformulated for the inventory management system under time-varyingand stochastic inflation environment for deteriorating items. the timehorizon is finite and demand rate is dependent to the inflation. in thereal situation, some but not all customers will wait for backlogged itemsduring a shortage period, such as for fashionable commodities or...

Exergy and thermoeconomic analyses are herein employed to evaluate the proposed refrigeration cycle of Tabriz olefin plant. The exergetic and exergoeconomic variables of all equipment and streams are calculated. Thermoeconomic model is developed according to the total revenue requirement (TRR) method. The results indicate that the rational efficiencies of the Heat Exchanger E-104 and compressor...