Scholarlink

<p>This work presents a combined experimental and numerical investigation of 3D-printed long carbon fiber composites, with a focus on developing and validating an advanced finite element model as the primary contribution. Tensile and three-point bending specimens were fabricated using a continuous fiber additive manufacturing process with two different fiber volume fractions: 41% and 21%. Mechanical testing revealed Young’s moduli of 40&#xa0;GPa and 28&#xa0;GPa, and ultimate tensile strengths (UTS) of 650&#xa0;MPa and 380&#xa0;MPa, respectively. Microstructural analysis indicated a porosity level of approximately 6%, which was incorporated into the numerical modeling. A finite element framework was implemented using the Gurson–Tvergaard–Needleman (GTN) damage model to simulate progressive failure behavior. Building on this validated material characterization and modeling framework, a morphing structural element in the form of a waved composite beam was designed and analyzed. The wave geometry imparted enhanced flexibility while minimizing stress concentrations, as confirmed through a series of automated parametric simulations. The optimized configuration achieved a maximum static deflection of 60&#xa0;mm with minimal stress, and transient dynamic analysis under cyclic loading further demonstrated the beam’s potential for morphing applications. This study highlights the capability of high-fidelity finite element models not only to predict the behavior of 3<i>D</i>-printed continuous fiber composites, but also to enable the design and performance optimization of advanced structural components such as morphing beams, bridging the gap between additive manufacturing and functional, application-driven engineering design.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Modeling of Additively Manufactured Continuous CFRP Using a Combined GTN–Chaboche Approach with Application to Waved Corrugated Beams for Morphing Structures

  • 期刊论文

  • 发表日期：

    2026年7月17日

查看全文
  • Kouider Bendine,
  • Samir Khatir,
  • Thanh Cuong-Le

摘要

This work presents a combined experimental and numerical investigation of 3D-printed long carbon fiber composites, with a focus on developing and validating an advanced finite element model as the primary contribution. Tensile and three-point bending specimens were fabricated using a continuous fiber additive manufacturing process with two different fiber volume fractions: 41% and 21%. Mechanical testing revealed Young’s moduli of 40 GPa and 28 GPa, and ultimate tensile strengths (UTS) of 650 MPa and 380 MPa, respectively. Microstructural analysis indicated a porosity level of approximately 6%, which was incorporated into the numerical modeling. A finite element framework was implemented using the Gurson–Tvergaard–Needleman (GTN) damage model to simulate progressive failure behavior. Building on this validated material characterization and modeling framework, a morphing structural element in the form of a waved composite beam was designed and analyzed. The wave geometry imparted enhanced flexibility while minimizing stress concentrations, as confirmed through a series of automated parametric simulations. The optimized configuration achieved a maximum static deflection of 60 mm with minimal stress, and transient dynamic analysis under cyclic loading further demonstrated the beam’s potential for morphing applications. This study highlights the capability of high-fidelity finite element models not only to predict the behavior of 3D-printed continuous fiber composites, but also to enable the design and performance optimization of advanced structural components such as morphing beams, bridging the gap between additive manufacturing and functional, application-driven engineering design.