Date of download: 7/31/2017
Copyright © ASME. All rights reserved.
From: Why Impacted Yarns Break at Lower Speed Than Classical Theory Predicts
J. Appl. Mech. 2011;78(5):051021-051021-7. doi:10.1115/1.4004328
Figure Legend:
Three views of a right circular cylinder flat-faced impactor (moving up the page) striking a single yarn, from an LS-DYNA
computation. The bends in the yarn show the transverse waves emanating from the edges of the impactor. The upward motion of
the yarn away from the impactor face, referred to as the bounce in the text, is due to the impact.
Date of download: 7/31/2017
Copyright © ASME. All rights reserved.
From: Why Impacted Yarns Break at Lower Speed Than Classical Theory Predicts
J. Appl. Mech. 2011;78(5):051021-051021-7. doi:10.1115/1.4004328
Figure Legend:
The geometry of the yarn motion in the original Lagrangian frame. The prescribed boundary velocity along the z axis is V, and a
longitudinal wave and a transverse wave move to the right.
Date of download: 7/31/2017
Copyright © ASME. All rights reserved.
From: Why Impacted Yarns Break at Lower Speed Than Classical Theory Predicts
J. Appl. Mech. 2011;78(5):051021-051021-7. doi:10.1115/1.4004328
Figure Legend:
The geometry of the yarn motion when impacted by the flat face projectile in the original Lagrangian frame (upper) and in the
laboratory frame (lower). The projectile velocity in the z direction is V. The speed of the yarn in the z direction after bouncing off the
projectile face is V¯. Only the right edge of the projectile is considered; from it, both longitudinal and transverse waves move to the
right and to the left. Similar waves emanate from the left edge of the projectile; when they meet at the center the strain in the yarn
doubles. Arrows indicate direction of material velocity components.
Date of download: 7/31/2017
Copyright © ASME. All rights reserved.
From: Why Impacted Yarns Break at Lower Speed Than Classical Theory Predicts
J. Appl. Mech. 2011;78(5):051021-051021-7. doi:10.1115/1.4004328
Figure Legend:
The impact speed at which a yarn breaks normalized by cE for three failure strains as a function of the amount of bounce V¯/V due
to the impact
Date of download: 7/31/2017
Copyright © ASME. All rights reserved.
From: Why Impacted Yarns Break at Lower Speed Than Classical Theory Predicts
J. Appl. Mech. 2011;78(5):051021-051021-7. doi:10.1115/1.4004328
Figure Legend:
The impact speed at which a yarn breaks normalized by the breaking speed from the classical theory as a function of the amount of
bounce V¯/V due to the impact