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Related Concept Videos

Impact01:30

Impact

250
Impact occurs when two bodies collide, leading to the application of impulsive forces between them. Analyzing impact mechanics involves considering two colliding particles moving along a line known as the line of impact, which passes through their centers and is perpendicular to the contact plane.
When particles with different initial velocities collide, they induce deformation by applying equal and opposite impulses. At the point of maximum deformation, the particles move together with...
250

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Multiple Impact Damage in GLARE Laminates: Experiments and Simulations.

Sang-Eui Lee1, Dong-Uk Kim2, Yong-Jun Cho1

  • 1Department of Mechanical Engineering, Inha University, Incheon 22212, Korea.

Materials (Basel, Switzerland)
|December 24, 2021
PubMed
Summary
This summary is machine-generated.

This study simulated multiple impacts on GLARE 5-2/1 and aluminum 2024-T3, validating a finite element model for predicting damage progression and failure behavior under impact loading.

Keywords:
BVIDCVIDFEM (finite element method)GLARE 5-2/1VUMATaluminum 2024-T3failure criteriamultiple impact

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Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Aerospace Engineering

Background:

  • Composite materials like GLARE are increasingly used in aerospace structures.
  • Understanding their response to impact damage, such as barely visible impact damage (BVID) and clearly visible impact damage (CVID), is critical for safety and durability.

Purpose of the Study:

  • To investigate and simulate the multiple impact behavior of GLARE 5-2/1 and aluminum 2024-T3.
  • To develop and validate a finite element model capable of predicting damage progression under multiple impact events.

Main Methods:

  • Experimental testing of GLARE 5-2/1 and aluminum 2024-T3 under various impact energies.
  • Development of a finite element model in ABAQUS for multiple impact analysis.
  • Implementation of a user subroutine (VUMAT) for three-dimensional progressive failure analysis.

Main Results:

  • Experimental data was used to validate the finite element model's accuracy.
  • The model successfully predicted load-time history, maximum deflection-impact energy, and damage progression.
  • FEM results demonstrated good agreement with experimental findings for both materials.

Conclusions:

  • The validated finite element model provides a reliable tool for analyzing multiple impact behavior in GLARE and aluminum.
  • The study enhances the understanding of damage mechanisms in composite-metal structures subjected to repeated impacts.