Microfibers are potential materials for filters, composite materials, wound dressings, scaffolds (tissue engineering), drug delivery and textiles. Hence, the quantitative understanding of the mechanical behavior (elastic deformation range, toughness, stiffness, ultimate strength, etc.) of microfibers is crucial for understanding their performance in target applications
Application Example: Microscale Tensile Testing of Silica Fibers
Mechanical testing of silica microfibers is done by tensile testing. The tensile testing as well as the sample preparation process is executed with the help of the FT-MTA03 Micromechanical Testing and Assembly System. The fiber is dragged on until it becomes straight and then stretched more using the "tensile testing" function of the FemtoTools Software Suite. The elongation, the stiffness, the maximum elongation, and the maximum yield strength are measured. Analysis of the relaxation behavior is made by stretching the fiber and calculating the force while maintaining the position constant. Following a large number of unloading and loading cycles, cyclic testing is carried out to determine the change in fiber elongation and stiffness.
Application Example: Microscale Testing of Root Hairs
In this application, the FT-MTA03 Micromechanical Testing and Assembly System is used for the fracture testing and tensile testing of a single root hair. This is done by fixing the end of the root hair to the tungsten tip of the FT-S Microforce Sensing Probe. At the time of the tensile test, the root hair is straightened while recording the applied force and the deformation. The ensuing force-versus-deformation plot reveals that following an initial loading, the root hair begins to fracture, as signified by a force drop. Conversely, the root hair does not fail completely and instead fractures partly and begins to form a helical shape. Upon increasing the force, the root hair persists to form more fractures while fully changing into a helix.
This information has been sourced, reviewed and adapted from materials provided by FemtoTools AG.
For more information on this source, please visit FemtoTools AG.