in this work, dynamic mechanical properties of three high-manganese steels with trip/twip or fully twip characteristics are studied. high strain rate experiments in the range of true strain rates between ~500 and 1800 /s are conducted using a dynamic torsional testing setup. all the three steels show a positive strain rate sensitivity in the intermediate range of strain rates (up to 500 /s). bu...

Optimal sensor placement is used to establish the optimal quantity and layout. In this study, minimum locations of measurement sensors were assumed satisfy constraint conditions placement. A set strain data in a truss structure was expanded another displacements corresponding entire degrees freedom from relationship between displacement. It indicates reduce number because depends on finite elem...

the effects of isothermal aging at temperatures between 550-850 ?c for durations of 1-100 h on microstructure, tensile properties, and impact fracture behavior of 316l austenitic stainless steel weld metal have been investigated. for this purpose, various techniques including metallographic observations, measurement of ferrite content using ferritscope, and fractographic investigations have bee...

A finite model updating method that combines dynamic-static long-gauge strain responses is proposed for highway bridge static loading tests. For this method, the objective function consisting of static long-gauge stains and the first order modal macro-strain parameter (frequency) is established, wherein the local bending stiffness, density and boundary conditions of the structures are selected ...

Aging is a complex trait that is affected by multiple genetic pathways. A relatively unexplored approach is to manipulate multiple independent aging pathways simultaneously in order to observe their cumulative effect on lifespan. Here, we report the phenotypic characterization of a strain with changes in five aging pathways: (1) mitochondrial reactive oxygen species (ROS) production, (2) innate...

An extensive literature covering the last 50 years has shown that all structural and bridge steels are potentially susceptible to strain aging. The most damage is done by cold strain itself. Strains in the 5% to 18% range can typically increase yield strength by 70% and typically increase tensile strength by 35%. Over the same strain range, tensile elongation will typically decrease by 30%. The...

In this paper, we show how beneficial effects of aging on static power consumption can be exploited to design reliable drowsy cache memories adopting dynamic voltage scaling (DVS) to reduce static power. First, we develop an analytical model allowing designers to evaluate the long-term threshold voltage degradation induced by bias temperature instability (BTI) in a drowsy cache memory. Through ...

INTRODUCTION In clinical practice, evaluation of postural control is based on the neurological examination, including Romberg's test, examination of gait and performance of pull test as part of the Unified Parkinson's Disease Rating Scale (UPDRS). The goal of our study was to identify posturographic parameters since quantitative technical methods for the measurement of postural control are not ...