What question did this study set out to answer?

The aim is to examine the dynamic behavior of smart composite structures with embedded heat sources across varying temperatures.

February 24, 2026Open Access

Study on the Fabrication and Dynamic Performance of Polypropylene Fiber Laminates with Built-In Heat Source

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Investigates dynamic behavior in smart composites with embedded heating, suggesting important applications for thermal regulation.

The aim is to examine the dynamic behavior of smart composite structures with embedded heat sources across varying temperatures.
Utilized thermoplastic polypropylene as the matrix with glass/carbon fiber prepregs.
Embedded Ni80Cr20 alloy heating wires into laminated specimens via prepreg molding.
Employed a variable-temperature cantilever beam vibration testing system for analysis.
Natural frequencies decreased with temperature, e.g., from 30.8 Hz at room temperature to 28.3 Hz at 140 °C.
Second-order and third-order natural frequencies reduced by about 8.99% and 9.65%, respectively.
Damping ratio for the first-order mode increased from 1.02% to 2.9% at elevated temperatures.

Gu et al. (2026) studied this question.

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