When elastic deformation occurs, a body recovers its original shape when the applied stress is released. On the contrary, the change in the shape of an object is irreversible when plastic deformation occurs, explains a Iowa State University sponsored website.Know More
Generally, deformation refers to the effect in the change of an object's shape when an exterior force is applied on its surface. In some cases, a change in temperature may also cause deformation. The external force applied on an object may be a torque, tangential or normal to the surface. Depending on the type, size and geometry of the material, and forces applied, a number of deformations may occur. Two most common types of deformation are elastic and plastic deformations. Others include compressive failure, metal fatigue and fracture.
When an external force is applied on an object, the object tends to pull itself apart. This increases the distance among atoms, which attempt to pull themselves towards one another as a way of resisting the stress. When the force is not sufficient to cause a permanent change, the object regains its original shape once the force is removed. This is known as elastic deformation.
Sometimes, a force being applied on a body may be massive, causing a total breakage of bonds among atoms. This may cause a permanent change in the shape of a body. This type of deformation is referred to as plastic deformation.Learn more about Plate Tectonics
According to the Theory of Plate Tectonics, the Earth has seven major or primary plates: the North American, South American, African, Antarctic, Indo-Australian, Eurasian and Pacific. There are also several secondary plates including the Arabian, Caribbean, Indian and Philippine Sea plates, and tertiary plates which make up sub-sections of the major plates of the Earth.Full Answer >
At a transform plate boundary, two tectonic plates pass one another, creating a fracture zone. This motion causes phenomena such as earthquakes.Full Answer >
The most active plate boundary is in the Pacific Ocean basin. Several tectonic plates collide in this area, which is known as the Ring of Fire due to the high number of volcanoes, earthquakes, deep sea trenches and other seismic activities occurring on its rim.Full Answer >
The three types of plate boundaries are divergent plate boundaries, convergent plate boundaries and transform plate boundaries. Divergent plate boundaries occur in places where two plates are moving away from each other. When two plates are being forced together, they are called convergent plate boundaries. Finally, transform plate boundaries occur in places where two plates are moving in opposite directions and rubbing against each other.Full Answer >