Characterization of Viscoelastic Behavior of Poly(dimethylsiloxane) by Nanoindentation

Characterization of the linearly viscoelastic behavior of human tympanic membrane by nanoindentation.

Human tympanic membrane (or eardrum) is composed of three membrane layers with collagen fibers oriented in the radial and circumferential directions, and exhibits viscoelastic behavior with membrane (or in-plane) properties different from through-thickness (or out-of-plane) properties. Due to the interaction of bundled fibers and ground substance, which is inhomogeneous, these properties could ...

Characterization of Viscoelastic Properties of Polymeric Materials through Nanoindentation

Nanoindentation is used to determine the dynamic viscoelastic properties of six polymer materials. It is shown that varying the harmonic frequency of the nanoindentation does not have any significant effect on the measured storage and loss moduli of the polymers. Agreement is found between these results and data from DMA testing of the same materials. Varying the harmonic amplitude of the nanoi...

Multilayer Quasi-Linear Viscoelastic Characterization of Porcine Aorta Using Nanoindentation

In a wide range of applications from traumatic injury to stent grafts, the arterial wall has been considered as a homogeneous single-layer vessel, ignoring the fact that arteries are composed of distinct anatomical layers with different mechanical characteristics. The multilayer nature of arteries has an important influence in the development of mathematical models to predict large deformations...

AN EXPLORATORY INVESTIGATION OF VISCOELASTIC NANOINDENTATION ON POLYVINYL ACETATE By

control of the optical properties of nanoparticles by laser fields

در این پایان نامه، درهمتنیدگی بین یک سیستم نقطه کوانتومی دوگانه(مولکول نقطه کوانتومی) و میدان مورد مطالعه قرار گرفته است. از آنتروپی ون نیومن به عنوان ابزاری برای بررسی درهمتنیدگی بین اتم و میدان استفاده شده و تاثیر پارامترهای مختلف، نظیر تونل زنی(که توسط تغییر ولتاژ ایجاد می شود)، شدت میدان و نسبت دو گسیل خودبخودی بر رفتار درجه درهمتنیدگی سیستم بررسی شده اشت.با تغییر هر یک از این پارامترها، در...