Comparative investigations on numerical modeling for warm hydroforming of AA5754-O aluminum sheet alloy

Hasan Gedikli, Ömer Necati Cora, Muammer Koç

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

This study aimed to determine the proper combinations of numerical modeling conditions (e.g. solver, element type, material model) for warm hydroforming of AA5754-O aluminum alloy sheets. Assessment of finite element analyses (FEA) is based on comparison of numerical results and experimental measurements obtained from closed-die forming, hydraulic bulge and tensile tests at different temperature (25-300 °C) and strain rate (0.0013-0.013 1/sec) levels. Thinning (% t) and cavity filling ratios (CFR) on the formed parts were taken as comparison parameters. Several numerical analyses employing different element types, solution methods and material models were performed using the commercially available FEA package LS-Dyna to determine the best combination of modeling options to simulate the actual warm hydroforming operation as accurately as possible. Analyses showed that relatively better predictions were obtained using isotropic material model, shell elements and implicit solution technique when compared with experimental results.

Original languageEnglish
Pages (from-to)2650-2662
Number of pages13
JournalMaterials and Design
Volume32
Issue number5
DOIs
Publication statusPublished - May 2011
Externally publishedYes

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Keywords

  • A. Non-ferrous metal and alloys
  • B. Film and sheet
  • C. Forming

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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