Dynamic properties of single and multi-bolted composite joints at different bolt-loads and elevated temperature

Abdus, Salam; Cheng, Xiaoquan; Cheng, Yujia; Hu, Renwei; Abid, Muhammad

doi:10.1080/14484846.2019.1629188

Cited by 2 publications

(1 citation statement)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results show that the increase in blade surface temperatures causes a decrease in the first natural frequency and an increase in blade length due to the thermal expansion. Abdus et al [31] numerically and experimentally investigated the influence of pre-load and temperature changes on the natural frequencies of bolted joints. The results indicate that the temperature rise reduces the overall stiffness and thus decreases the natural frequencies.…”

Section: Introductionmentioning

confidence: 99%

The Coupled Effect of Temperature Changes and Damage Depth on Natural Frequencies in Beam-Like Structures

Al-hababi¹,

Alkayem²,

Cui³

et al. 2022

Structural Durability &Amp; Health Monitoring

View full text Add to dashboard Cite

A significant amount of research is concerned with dynamic modal parameters for damage detection of structural conditions due to their simplicity in use and feasibility. However, their use for damage detection should be performed with special attention, particularly in operational and environmental conditions subjected to temperature changes. Beams in construction industries experience different loading types, such as temperature changes leading to crack initiation and propagation. Changed physical and dynamic properties such as natural frequencies and mode shapes indicate that damage has occurred within the structures. In this study, vibration analysis of cantilever and cantilever simply supported beams has been carried out on intact and damaged beams to investigate the coupled effect of temperature changes and damage depth on natural frequencies. A numerical analysis of beams is completed using ANSYS software. The results of numerical simulation are validated using two other studies from literature. Numerical results revealed that in order to perform a successful damage assessment using the frequency shift, the vibration modes should be selected properly. In addition, an increase in temperature results in a decrease in structural frequencies. The assessment of the effect of damage depth on natural frequencies also confirms that when damage depth is increased, there is a significant decrease in natural frequency responses.

show abstract

Section: Introductionmentioning

confidence: 99%