Abstract:

In order to solve the probleb of testion two-dimensional plane extended property to characterize the formability of automobiles roof interior fabric, the INSTRON5967 type universal material testing machine was employed to test the top stretching deformation of warp knitted napped fabric, pile composite fabric and sponge composite fabric. The geometric model of top length and the top deformation rate was established. It  calculated the top stretching deformation rate under different top tensities. The top stretching deformation rate was used to evaluate he three-dimensional formability of car roof interior fabric under a constant force. The results indicate the top stretching deformation rate of pile fabric id bigger than pile composite fabric, the sponges ceiling composite fabrics are superior to the fleece kind which showed the three-dimensional formability of sponges is stronger, and the pile composite fabrics formability remains to be improved.

Key words: automobiles roof interior, formability, geometric model, top stretching deformation