Fiber tension clamps

FIG. 7-5. Apparatus of Fujino, Kawai, and Horino for measurement of dynamic Young s modulus of fibers by free vibrations. (A. A ) Chucks (B) sample fibers (C) clamps (D) inertial disc (E) idler pulleys (F) piano wire (C) mirror to reflect light beam (H) weight to adjust static tension. 

Cecchi, G., Griffiths, P. J., Bagni, M. A., Ashley, C. C., and Maeda, Y. (1991). Time-resolved changes in equatorial X-ray diffraction and stiffness during rise of tetanic tension in intact length-clamped single muscle fibers. Biophys.J. 59, 1273-1283. 

A rigidly held fiber is stretched in tension to a certain stress and cut at the midpoint by a pair of scissors or an electric spark. The tensile wave is reflected at the rigid clamps into a compressive wave. 

The extruded fibers were allowed to fall freely without any tension and then wound on bobbins. The extruded fibers were stretched with draw ratios 3 and 4 using Instron fiber clamps at room temperature. Stretched samples were used for further characterization. 

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