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Related Concept Videos

Behavior of Concrete Under Compressive Load01:23

Behavior of Concrete Under Compressive Load

149
Concrete exhibits specific behaviors under different compressive loads. Understanding this is crucial for understanding its structural integrity. When concrete undergoes uniaxial compression, it tends to develop cracks that run parallel to the direction of the force. These parallel cracks stem from localized tensile stresses that occur perpendicular to the compression direction. Additionally, angled cracks may appear due to the formation of shear planes.
As the concrete specimen fractures under...
149

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Compression Behavior of 3D Printed Composite Isogrid Structures.

Marina Andreozzi1, Carlo Bruni1, Archimede Forcellese1

  • 1Dipartimento di Ingegneria Industriale e Scienze Matematiche (DIISM), Università Politecnica delle Marche, Via Brecce Bianche 12, 60131 Ancona, Italy.

Polymers
|October 16, 2024
PubMed
Summary
This summary is machine-generated.

3D-printed carbon fiber isogrid structures show improved buckling resistance with higher infill density. Optimizing printing processes is crucial to mitigate voids and enhance performance for demanding applications.

Keywords:
3D printingcompositesisogrid

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Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Additive Manufacturing

Background:

  • Carbon fiber-reinforced polymers (CFRPs) offer high strength-to-weight ratios, ideal for aerospace and automotive industries.
  • CFRP structures face challenges in compressive behavior due to instability and premature failure.
  • Isogrid structures enhance CFRP panel compressive performance, but traditional manufacturing is costly.

Purpose of the Study:

  • To investigate the compressive behavior of 3D-printed isogrid CFRP structures.
  • To evaluate the impact of infill density on buckling resistance.
  • To identify failure modes and microstructural characteristics of 3D-printed isogrids.

Main Methods:

  • Fabrication of eight isogrid CFRP panels using continuous fiber 3D printing (Anisoprint Composer A3).
  • Buckling tests were performed on the fabricated panels.
  • Post-test analysis included optical microscopy and scanning electron microscopy (SEM).

Main Results:

  • Buckling resistance directly correlated with infill density; higher density yielded greater buckling loads.
  • Failure modes shifted from local to global buckling with increased infill density.
  • Voids were observed in 3D-printed structures, negatively impacting mechanical performance.

Conclusions:

  • 3D-printed isogrid CFRP structures demonstrate significant buckling resistance, offering a viable alternative for high-performance applications.
  • Infill density is a critical parameter for enhancing structural integrity.
  • Addressing voids through process optimization is essential for improving the reliability of 3D-printed CFRP isogrids.