Delamination Limit of Aluminum Foil-Laminated Sheet During Stretch Forming

등이축인장 모드 변형시 알루미늄 포일 접착강판의 박리한계 예측

  • Lee, Chan-Joo (School of Mechanical Engineering, Pusan Nat'l Univ.) ;
  • Son, Young-Ki (School of Mechanical Engineering, Pusan Nat'l Univ.) ;
  • Lee, Jung-Min (Dongnam Regional Division, Korea Institute of Industrial Technology) ;
  • Lee, Seon-Bong (Faculty of Mechanical and Automotive Engineering, Keimyung Univ.) ;
  • Byun, Sang-Deog (LG Electronics) ;
  • Kim, Byung-Min (School of Mechanical Engineering, Pusan Nat'l Univ.)
  • Received : 2011.09.19
  • Accepted : 2022.01.25
  • Published : 2012.04.01


An aluminum foil-laminated sheet is a laminated steel sheet on which aluminum foil is adhesively bonded. It is usually used on the outer panel of home appliances to provide an aluminum feeling and appearance on the surface of the product. The delamination of aluminum foil is one of the main problems during the stretch forming process. The purpose of this study is was to determine the delamination limit of an aluminum foil-laminated sheet in the stretch forming process. The delamination was dependent on the bonding strength between aluminum foil and steel sheet. The fracture behavior of the interface between the aluminum foil and the steel sheet was described by a cohesive zone model. A finite element was conducted with the cohesive zone model to analyze the relationship between the delamination limit and the bonding strength of the interface. The interface bonding strength was evaluated by lap shear and T-peel test. The delamination limit of the aluminum foil-laminated sheet was determined by using the bonding strength of the steel sheet. The delamination limit was also verified by the Erichsen test.


Aluminum Foil Laminated Sheet;Delamination Limit;Cohesive Zone Model;Bonding Strength


Supported by : 한국연구재단, 한국산업기술재단


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