ABSTRACT
This chapter introduces micro measurement of single fibers. There is a strong anisotropy in the mechanical properties and strength of fibers. This is caused by the strong orientation of molecular chains along the direction of the fiber’s axis. Clarification of the details of these fiber properties is necessary for both the science of oriented polymers and the engineering needed to apply these fibers to various fibrous structures and fiber-composite materials. The single-fiber measurement eliminates the uncertainty of measurement caused by the indirect method. One difficulty in direct measurement is, however, the measurement of the very small force and deformation caused by the small size of the fiber. This simple equation is reliable with a high-volume fraction of fiber. The tensile region was measured by the single-fiber extension measurement and the compression region was measured by the micro composite method.
