D.where D.is the Deborah number r is the characteristic or relaxation time associate with the material,and T is a characteristic time of the deformation process High Deborah numbers correspond to solids and Low Deborah numbers correspond to liquids Time-Dependent Viscoelastic Behavior: Solid and Liquid Properties of"Silly Putty" Deborah Number [De]=t/T Relaxation time Tis short[k1s】 T is long [24 hours] STORAGE LOSS OF VISCOELASTIC MATERIAL ◆SUPER BALL LOSS TENNIS BALL STORAGE 22 Low Deborah numbers correspond to liquids High Deborah numbers correspond to solids and T is a characteristic time of the deformation process is the characteristic or relaxation time associate with the material, and where D is the Deborah number e τ τ T De = Time-Dependent Viscoelastic Behavior: Solid and Liquid Properties of "Silly Putty" T is short [< 1s] T is long [24 hours] Deborah Number [De] = τ / Τ Relaxation time STORAGE & LOSS OF VISCOELASTIC MATERIAL SUPER BALL TENNIS BALL X STORAGE LOSS