Measurement method of complex viscoelastic material properties

buckling of viscoelastic composite plates using the finite strip method

در سال های اخیر، تقاضای استفاده از تئوری خطی ویسکوالاستیسیته بیشتر شده است. با افزایش استفاده از کامپوزیت های پیشرفته در صنایع هوایی و همچنین استفاده روزافزون از مواد پلیمری، اهمیت روش های دقیق طراحی و تحلیل چنین ساختارهایی بیشتر شده است. این مواد جدید از خودشان رفتارهای مکانیکی ارائه می دهند که با تئوری های الاستیسیته و ویسکوزیته، نمی توان آن ها را توصیف کرد. این مواد، خواص ویسکوالاستیک دارند....

Measurement of Dielectric Material Properties

Micromechanics simulations of the viscoelastic properties of PBX-9501 by material point method

Viscoelastic properties of the highly filled plastic-bonded explosive PBX-9501 were studied by two-dimensional dynamic Material Point Method (MPM) simulations. The upper and lower bounds for the composite properties were estimated from iso-displacement and iso-stress boundary conditions. A homogenized or “dirty” binder approach was utilized to handle the multiple length scales involved in MPM s...

Viscoelastic fluid description of bacterial biofilm material properties.

A mathematical model describing the constitutive properties of biofilms is required for predicting biofilm deformation, failure, and detachment in response to mechanical forces. Laboratory observations indicate that biofilms are viscoelastic materials. Likewise, current knowledge of biofilm internal structure suggests modeling biofilms as associated polymer viscoelastic systems. Supporting expe...

Measurement of viscoelastic properties of arteries in the living dog.

Dynamic elastic moduli (Edyn) and viscous moduli (T]O>) of the arterial wall were obtained at a number of sites of the systemic vascular tree of living dogs anesthetized with pentobarbital. Constants were calculated using the first harmonics of pressure and diameter obtained from a Fourier analysis of simultaneously recorded pulse waves. The means and standard errors of Edjn, in dynes cm~ X 10°...