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Fiber-Reinforced Polymeric Composites

A special issue of Polymers (ISSN 2073-4360). This special issue belongs to the section "Polymer Composites and Nanocomposites".

Deadline for manuscript submissions: 31 March 2026 | Viewed by 490

Special Issue Editor

State Key Laboratory of Advanced Fiber Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
Interests: fiber-reinforced thermoplastic composites; 3D printing composites; shape memory polymers; photonic crystals

Special Issue Information

Dear Colleagues,

Fiber-reinforced polymeric composites (FRPCs), made with short-cut, continuous or woven fibers as reinforcement, are the most crucial category in many composite materials. Through various methods, such as winding, molding or extruding processes, FRPCs have exhibited high specific strength, good designability, excellent fatigue performance, among others. Researchers and engineers in numerous fields,  such as aerospace, aircraft, automobile, etc, have been giving significant attention to this area of research. Recently, novel preparation technology, interface modification and numerical simulation not only provide effective designs for high-performance composites but also promote practical applications. Topics that are particularly encouraged for this Special  Issue include, but are not limited to, the following research areas:

  • Advanced manufacturing technology;
  • Interface modification;
  • Multi-scale simulation;
  • Novel properties and applications;
  • Reinforcement theory.

Dr. Lili Yang
Guest Editor

Manuscript Submission Information

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Keywords

  • thermoplastic composite
  • 3D printing
  • interface modification
  • modeling
  • green technology
  • recycling

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Published Papers (1 paper)

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Research

16 pages, 3753 KB  
Article
Effects of Stress Level and Elevated Temperature on Transverse Compression Stress Relaxation Behavior and Post-Relaxation Mechanical Performance of UD-CFRP
by Jianwen Li, Maoqiang Wang, Lili Hu and Xiaogang Liu
Polymers 2025, 17(20), 2718; https://doi.org/10.3390/polym17202718 - 10 Oct 2025
Viewed by 294
Abstract
Unidirectional carbon fiber-reinforced polymer (UD-CFRP) composites demonstrate superior tensile creep strain and stress relaxation behavior along fiber orientation. However, prolonged transverse compressive loading in structural connection zones induces significant interfacial stress relaxation and creep deformation, primarily driven by resin matrix degradation and interfacial [...] Read more.
Unidirectional carbon fiber-reinforced polymer (UD-CFRP) composites demonstrate superior tensile creep strain and stress relaxation behavior along fiber orientation. However, prolonged transverse compressive loading in structural connection zones induces significant interfacial stress relaxation and creep deformation, primarily driven by resin matrix degradation and interfacial slippage under thermal-mechanical interactions, and remains poorly understood. This study systematically investigates the transverse stress relaxation characteristics of UD-CFRP through controlled experiments under varying thermal conditions (20–80 °C) and compressive stress levels (30–80% ultimate strength). Post-relaxation mechanical properties were quantitatively evaluated, followed by the development of a temperature-stress-time-dependent predictive model aligned with industry standards. The experimental results reveal bi-stage relaxation behavior under elevated temperatures and compressive stresses, characterized by a rapid primary phase and stabilized secondary phase progression. Notably, residual transverse compressive strength remained almost unchanged, while post-relaxation elastic modulus increased by around 10% compared to baseline specimens. Predictive modeling indicates that million-hour relaxation rates escalate with temperature elevation, reaching 51% at 60 °C/60% stress level—about 1.8 times higher than equivalent 20 °C conditions. These findings provide crucial design insights and predictive tools for ensuring the long-term integrity of CFRP-based structures subjected to transverse compression in various thermal environments. Full article
(This article belongs to the Special Issue Fiber-Reinforced Polymeric Composites)
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