# What is hoop stress?

According to Engineers Edge, hoop stress is created by internal pressure on a thin wall of a cylindrical pressure vessel. The hoop stress equation is used to determine the amount of pressure a cylindrical pressure vessel can hold.

According to Wikipedia, the primary concept behind hoop stress is that the stress is distributed evenly across the hoop. Engineer's Edge notes that the hoop stress equation is necessary for validating the thin-walled assumption that a cylindrical vessel must have a wall thickness of no more than one-tenth of its radius in order to withstand internal pressure. For this reason, the idea of hoop stress is incredibly important to the field of material mechanics.

Wikipedia defines hoop stress as a normal stress in the tangential direction of a cylindrical item. Hoop stress occurs when force is exerted circularly in both directions on a cylinder's internal wall. In cases of hoop stress, the wall tension is defined in terms of the complete circumferential force exerted. To solve the equation for hoop stress, observers first decompose the force applied to the cylindrical object using the principle of rotational symmetry. Once that is done, the corresponding stresses of radial, axial and hoop dynamics can be factored into the equation.

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Q&A Related to "What is hoop stress?"
 Hoop stress is just nothing but stress which can be acted upon circumferentialy formed material, where as subjected to internal & external pressure. Formula is (internal pressure http://wiki.answers.com/Q/What_is_the_Formula_for_...
 1. Determine the internal diameter (D) of the concrete ring, either by measuring the diameter of the ring or consulting material documentation. 2. Determine the wall thickness (t) http://www.ehow.com/how_5920634_calculate-tensile-...
 Hoop stress is mechanical stress applied in a direction perpendicular to the radius of the item in question. Along with axial stress and radial stress, it is a component of the stress http://answers.yahoo.com/question/index?qid=100604...
 Hoop stress is just nothing but stress which can be acted upon circumferentialy formed material, where as subjected to internal & external pressure. Formula is (internal pressure http://www.webanswers.com/technology-computers/wha...
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