Summary of Influence of Integrating Stiffening Grid Honeycomb Structure in Syntactic Foam Core on Structural Vibration Response of Sandwich Composites

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Article

Abstract

Study Background: High strength-to-weight ratio and high stiffness-to-weight ratio are the potential benefits of syntactic foam core sandwich composite for structural applications. However, these composite structures may encounter problems in correlation with vibration because of poor quality, and this leads to poor structural performance.

Research Goals and hypotheses: The Present investigation focused on improving the structural performance of syntactic-foam core sandwich composites by enhancing their quality factor. This is achieved by integrating a stiffening grid honeycomb structure in syntactic foam during manufacturing.

Methodological Approach: Methods The investigation has been restricted to the flexural vibrations of sandwich composite beams, which are the predominant mode of vibration in many practical vibration scenarios. Experimentally modal analyses are carried out to analyze the vibration signals under different boundary conditions. Initially suitable theoretical model is used to validate the experimental results.

Result and Discoveries: Results obtained from the investigation reveal that the stiffened syntactic foam core sandwich composite shows excellent vibration attenuation characteristics. This behavior can be attributed to stiffening grid honeycomb cells in the syntactic foam core. Each cell wall of the honeycomb grid leads to the interference between the incident wave and the reflected wave under vibrating conditions. Further, the vibration response characteristics are significantly affected by the orientation and boundary conditions. It is observed that the increase in the frequency of vibration, better quality factor, and minor decrease in the damping ratio of sandwich composites are considerably influenced by the confined state of syntactic foam in the hexagonal cell size of honeycomb stiffening grid structure.

Publication date: 2023

Recommended citations: Kumar, S.J.A., Kumar, S.J.A. & Kumar, A.S.S. Influence of Integrating Stiffening Grid Honeycomb Structure in Syntactic Foam Core on Structural Vibration Response of Sandwich Composites. J. Vib. Eng. Technol. 11, 4253–4267 (2023). https://doi.org/10.1007/s42417-022-00813-4

Link: https://rdcu.be/dQNJX

Recommended citations: Kumar, S.J.A., Kumar, S.J.A. & Kumar, A.S.S (2023) Summary of Influence of Integrating Stiffening Grid Honeycomb Structure in Syntactic Foam Core on Structural Vibration Response of Sandwich Composites

Publication Date

2023

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