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Structural Evaluation of Steel/CFRP Hybrid Part Using Progressive Damage Model and Cohesive Zone Model.

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This study evaluates steel/Carbon-Fiber-Reinforced Plastic (CFRP) hybrid parts for automotive weight reduction. Impact analysis using advanced material models verified the hybrid part

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Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Automotive Engineering

Background:

  • Carbon-Fiber-Reinforced Plastic (CFRP) is a key lightweight material in aerospace.
  • The automotive sector increasingly uses composites for vehicle weight reduction.
  • Steel/CFRP hybrid parts offer a balance of reduced weight and high strength.

Purpose of the Study:

  • To evaluate the impact performance of steel/CFRP hybrid parts.
  • To validate material models for predicting hybrid part behavior under collision.
  • To compare simulation results with experimental data for accuracy.

Main Methods:

  • Mechanical properties of steel were tested at various strain rates.
  • Material properties of CFRP were assessed in tensile and compressive directions.
  • Cohesive properties of adhesive film were evaluated under normal and shear loading.
  • Impact analysis was performed using Johnson-Cook, Progressive Damage Analysis (PDA), and Cohesive Zone Models (CZM).

Main Results:

  • Material properties for steel, CFRP, and adhesive interfaces were determined.
  • Impact analysis predicted the behavior and strength of steel/CFRP hybrid parts during collisions.
  • Simulation results were successfully validated against experimental data.

Conclusions:

  • The study successfully evaluated steel/CFRP hybrid parts using advanced material models.
  • The validated models accurately predict the performance of these hybrid components under impact.
  • This research supports the application of steel/CFRP hybrids for automotive weight reduction and safety.