Figure 2: Stress- strain graph
The stress strain relation dependent on time and time-depending behavior of materials is known as visco-elasticity. This term derived in two expressions: Viscosity and Elasticity, Elasticity is about solid whereas Viscosity resistance to flow in fluids. Therefore, this type of material is a combination of fluid and solid properties which presents a following relation (1) where is stress tensor, is visco-elastic coefficient and is strain rate.
In my thesis research problems we have choose Kelvin Voigt model. Since Kelvin gives Voigt model for visco-elastic solids. This …show more content…
As the stress is applied, the spring and dashpot will deform by an equivalent quantity because we have choose in this model parallel arrangement. Thus, the whole strain will be equivalent to the strains of spring and dash pot , which strain represents by following equation (3) using definition of elasticity and visco-elasticity for spring and dashpot: (4) …show more content…
The three main layers are the crust, mantle and core. The crust is the outer part and the core is the inner part of the Earth, between them is the mantle. The Earth is surrounded by the atmosphere. However, no one has ever actually seen the inner layers of the planet. Because the Earth cannot be easily recreated in a laboratory scientists about Earth’s interior has been deduced by scientists’ congregation information at the Earth’s surface. Thanks to this technical research, humans now know the basic ingredients and general size of each of Earth’s layers. Few of the layers are solid like an ice cube, whereas others are semi-liquid like a milkshake. Each layer is dynamic and constantly changing. Activities of rock and heat inside each layer give rise to dissimilar Earth processes and human life is directly affected by the change any movements of the inside Earth. Earth’s layer study is ultimately helps humans to better understand the planet’s processes; together with those taking place in it’s inside the layers. Usually known as Earth science, this field includes several different areas of scientific research. For example, a geologist studying rocks on a wall is one type of Earth scientist; another type of Earth scientist is the seismologist who records the waves of energy that travel all the way through the Earth following an earthquake. Although the several forms of Earth science, however, there are really only two ways to study