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Characteristics of shear thickening fluid and its application in engineering: a state-of-the-art review

Abstract

Shear thickening fluid (STF), a type of non-Newtonian fluid, becomes more viscous as the strain rate rises. Due to their unique rheological properties, STFs have outstanding vibration-damping and energy-absorbing capabilities and have tremendous engineering applications. To obtain a comprehensive understanding of STFs, a review of aspects from the principle and composition, theoretical expression to application of STFs is presented on what are in this paper. In terms of principle of STFs, the thickening theory and thickening mechanism are explained firstly. The rheological characteristics and mechanical properties of STFs are reviewed. Subsequently, typical composition and preparation methods of STFs are enumerated. In terms of theoretical expression, theoretical modelling methods towards the viscosity of STFs are summarized. In terms of application, influencing factors on the thickening properties are examined. Furthermore, current engineering applications of STFs are presented. Finally, future perspectives on the research of STFs are put forward in the conclusion. The work of this article provides a systematic study and thorough knowledge of STFs, which is beneficial for numerous potential engineering applications of STFs.

article Review

date_range 2024

language English

link Link of the paper

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Wang Shuqi

Zhang Wenyu

Gao Jie

Gao Dongliang

He Chunlei

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Featured Keywords

Shear thickening fluid

Thickening mechanism

Rheological characteristics

Mechanical properties

Modelling

Influencing factors

Engineering application

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Assessment of reinforced concrete building damages following the Kahramanmaraş earthquakes in Malatya, Turkey (February 6, 2023)

Abstract

Earthquakes of magnitude Mw = 7.7 and Mw = 7.6 hit the city of Kahramanmaraş (Turkey) on 6 February 2023. These earthquakes caused serious damage in 11 provinces in Turkey resulting in over 50,000 deaths and huge economic losses with the collapse of thousands of buildings. Two consecutive devastating earthquakes have severely damaged the reinforced concrete building stock located in Malatya. There are many reasons reinforced concrete structures suffer damage under the influence of seismic loads. These reasons can be listed as material and section properties that do not comply with earthquake codes, workmanship defects, ground parameters that are not considered and design errors, as seen in field investigations after earthquakes in Turkey in the past. In this research, a field study was conducted on reinforced concrete buildings damaged after the earthquakes in Malatya province. The causes of structural damages in reinforced concrete buildings between 6–26 years of age were assessed in terms of design and material defects. The structural damages were mainly caused due to insufficient stirrups in structural members, short column, strong beam–weak column, failures of infill walls, soft story type collapse, poor concrete quality, and reinforcement corrosion. In addition to the field investigation, the spectrum relationships created using raw acceleration data obtained from DEMP (Disaster and Emergency Management Presidency) stations in Malatya province were compared with the design response spectra.

article Article

date_range 2024

language English

link Link of the paper

Collapsed buildings

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