Nano dynamic mechanics model
Using oscillating force, continuous measuring contact depth, viscoelastic and fatigue characteristics and function of the frequency and time
Biological materials, glass, polymer, and metal materials in terms of mechanical properties showed a significant time dependence.The viscoelastic makes use of traditional nano indentation technique is very difficult to fully describe the material response.In the traditional theory of dynamic mechanics analysis (DMA), on the basis of brooke established a nanoscale materials mechanics analysis in situ nanoDynamic mode option.
NanoDynamic model can provide a variety of test mode, using oscillating force to sample measurement, and a phase-locked amplifier is used to measure the total displacement amplitude and phase shift.Using this technique, can accurately determine the contact stiffness and damping characteristics of materials, so as to measure the storage modulus (E ') and loss modulus (E "), and the dielectric loss tangent.In addition, the technology has been extended to other test mode, can in characterization of various kinds of materials or structures of creep and fatigue induced using electron microscope monitoring deformation at the same time.
