Abstract: The failure of LVDSS (laminated vibration damping steel sheet) is different from single steel sheet because of structural particularity. The delimination of interface and fracture of skin sheets are the common failure of LVDSS. The experimental method and the specimen were designed to test the normal bonding strength between the skin sheets of LVDSS. Furthermore, hole expanding experiments of LVDSS were also conducted. The normal bonding strength and the average hole expanding ratio were obtained, which provide useful failure criterion for numerical simulation. The experiment indicates that the difference between LVDSS and single steel sheet is not only the difference of material property parameters and process parameters but also the difference of failure mode. New failure criterion and examining approaches should be developed for the wide and successful application of LVDSS.

Key words: laminated vibration damping steel sheet, normal bonding strength, hole expanding capability