Common textile material

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Which path of loading$/$unloading is faster?

Different stiffness, hysteresis, strain rate$-$sensitive$,$ historydependent

Sources$/$scales of viscosity and elasticity

Molecular chains of polymer in fibers: Molecular friction $[$microscopic$,$ nanometer$]$

Twisting of fibers in yarns:

Fibrous friction $[$mesoscopic$,$ micrometer$]$

Sliding of contact yarns in fabrics:

Fabric friction $[$macroscopic$,$ millimeter$]$

Equipment to be used in the project

Universal Testing Machine

$($UTM$)$ in HHB$-1307$

Materials Testing System $($MTS$)$ in HHB$-803$

Digital Microscope $($DM$)$

in HHB$-803$