FDM制造的塑性聚合物细胞模型结构的断裂特性

IF 4.7 2区工程技术 Q1 MECHANICS

Engineering Fracture Mechanics Pub Date : 2025-03-24 DOI:10.1016/j.engfracmech.2025.111011

Jacopo Agnelli , Claudia Pagano , Irene Fassi , Luca D’Andrea , Pasquale Vena , Laura Treccani , Fabio Bignotti , Francesco Baldi

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引用次数: 0

摘要

这项工作解决了断裂力学（FM）测试方案对具有可控结构的聚合物开孔多孔固体的适用性的具体基础和方法问题，在细胞尺度上表现出弹塑性响应和明显的结构非均质性。采用熔融沉积建模（FDM）方法制备了丙烯腈-丁二烯-苯乙烯（ABS）模型结构，并对其i型断裂响应进行了研究。研究了不同孔隙度（≈20% ~≈70%）的结构，确定了起裂韧性（j积分）数据。圆形截面梁状结构单元经历了不同的力学宏观约束模式，能够驱动从真正的细胞到含有孤立孔隙的固体的过渡。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Fracture characterization of ductile polymer cellular model structures manufactured by FDM

This work addresses specific fundamental and methodological issues regarding the applicability of Fracture Mechanics (FM) testing schemes to polymer open-celled cellular solids with controlled architecture, exhibiting an elastic–plastic response and with pronounced structural heterogeneity at the cell-scale. Acrylonitrile-Butadiene-Styrene (ABS) model structures were manufactured by Fused Deposition Modeling (FDM), and their mode-I fracture response investigated. Structures with different porosity degrees (from

\approx 20 %

\approx 70 %

) were examined, and initiation fracture toughness (J-integral) data determined. Different modes of mechanical macro-confinement experienced by the circular cross-section beam-like structural element were noticed, able to drive a transition from true cellular to solid containing isolated pores.

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来源期刊

Engineering Fracture Mechanics 物理-力学

CiteScore

8.70

自引率

13.00%

发文量

606

审稿时长

74 days

期刊介绍： EFM covers a broad range of topics in fracture mechanics to be of interest and use to both researchers and practitioners. Contributions are welcome which address the fracture behavior of conventional engineering material systems as well as newly emerging material systems. Contributions on developments in the areas of mechanics and materials science strongly related to fracture mechanics are also welcome. Papers on fatigue are welcome if they treat the fatigue process using the methods of fracture mechanics.