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Bending of Members Made of Several Materials

Bending of Members Made of Several Materials

In analyzing a structural member composed of two different materials with identical cross-sectional areas, it is crucial to understand how their distinct elastic properties affect the member's response under load. The analysis involves assessing stress and strain distributions using the transformed section concept, which accounts for variations in material properties.
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each material's...

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Damage analysis of biocomposite laminates using model order reduction.

Gil Ho Yoon, Heung Soo Kim

Journal of Nanoscience and Nanotechnology

|May 7, 2015

Summary

This study efficiently calculates the transient response of delaminated biocomposite laminates using the transient quasi-static Ritz vector method (TQSRV). Model order reduction (MOR) effectively predicts damage effects in these structures.

Area of Science:

Composite Materials Science
Structural Health Monitoring
Piezoelectric Applications

Background:

Laminated biocomposite structures are susceptible to delamination, impacting their structural integrity.
Accurate prediction of transient responses in damaged composites is crucial for safety and performance.
Piezoelectric materials offer a viable method for both actuating and sensing structural responses.

Purpose of the Study:

To develop an efficient method for calculating the transient response of delaminated biocomposite laminates.
To investigate the influence of delamination location on the structural response.
To assess the effectiveness of model order reduction (MOR) in detecting delamination effects.

Main Methods:

Application of the transient quasi-static Ritz vector method (TQSRV) for efficient transient response calculation.

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Modeling delamination using an improved layerwise displacement field and piezoelectric coupling with higher-order electric potential.

Utilizing the Newmark-beta algorithm and MOR for transient response analysis under impulse loading.

Main Results:

Delamination effects were clearly identified in the power spectral density of the piezoelectric sensor output.
The study analyzed the impact of single discrete delamination at three different through-thickness locations.
The transient quasi-static Ritz vector method (TQSRV) demonstrated efficiency in capturing delamination-induced changes.

Conclusions:

Model order reduction (MOR) is a highly efficient technique for predicting damage effects in delaminated biocomposite structures.
The TQSRV method, combined with MOR, provides a robust approach for analyzing the dynamic behavior of damaged composites.
Understanding delamination effects is critical for the reliable design and maintenance of biocomposite structures.