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...

The paper aims to extract the dynamic properties of existing structures without utilizing the analytical models. The ambient vibration testing could be used on any type of frame such as concrete, steel and masonry to investigate the structural vulnerability. The method could be the first stage and necessarily for the retrofit process. To achieve this aim, the ambient vibration testing can...

 Abstract Background: Various types of foot orthoses are prescribed for people with flatfoot. It has been reported that orthoses not only improve the biomechanics of the lower limb, but also have good effects on some balance parameters in these subjects. It is hypothesized that the latter effect is dependent on the rigidity of the orthoses. The aim of this study was to evaluate and compare the ...

Advanced high strength steels (AHSS) have recently attracted great attention because of their superior mechanical properties. A modern group of these steels, known as twinning induced plasticity (TWIP) steels, shows a unique combination of strength and ductility even at high rates of strain. In order to examine the functionality of such steels in dynamic loading conditions, their mechanical beh...

acceptance sampling models have been widely applied in companies for the inspection and testing the raw material as well as the final products. a number of lots of the items are produced in a day in the industries so it may be impossible to inspect/test each item in a lot. the acceptance sampling models only provide the guarantee for the producer and consumer that the items in the lots are acco...

abstract background: various types of foot orthoses are prescribed for people with flatfoot. it has been reported that orthoses not only improve the biomechanics of the lower limb, but also have good effects on some balance parameters in these subjects. it is hypothesized that the latter effect is dependent on the rigidity of the orthoses. the aim of this study was to evaluate and compare the e...

the ambient vibration measurement is a kind of output data-only dynamic testing where the traffics and winds are used as agents responsible for natural or environmental excitation. therefore an experimental modal analysis procedure for ambient vibration testing needs to base itself on output-only data. the modal analysis involving output-only measurements present a challenge that requires the u...

This paper presents a Java-Powered Virtual Laboratories (VL) which has been developed to provide a means for on-line interactive structural dynamics experiments for undergraduate and graduate education. This VL intends to provide a conceptual and practical understanding of a wide range of topics related to the collection, analysis, and interpretation of data from dynamic testing, including sens...

In this paper, we investigate the causality in sense of Granger for functional time series. The concept series is defined, and a statistical procedure testing hypothesis non-causality proposed. based on projections dynamic principal components use multivariate test. A comparative study with existing procedures shows good results our An illustration real dataset provided to attest performance pr...