Stress and stain :: essays research papers

Simple Stress and StrainThe strength of visibles are expressed from the point of view of machine designer. A machine designer needs to know the properties of different materials so that he potbelly select the most suitable material for each part of a machine. A machine designer uses his information of strain to make sure that the stress is reasonable and that each part of the machine is sufficiently strong. Strength of materials is the scientific area of applied mechanics for the study of the strength of engineering materials and their mechanical behavior in general (such as stress, deformation, strain and stress-strain relations). Strength is considered in name of compressive strength, tensile strength, and shear strength, namely the limit states of compressive stress, tensile stress and shear stress respectively.One can see the importance of stress and strain. They are an trait of how severely the part in machine is loaded and how it is a factor that determines whether the fo rces applied are reasonable. Stress and strain always occur together. When a material is subjected to stress, it deforms, and when a material is deformed there must be strain. If the stress and strain are not the same for all materials, then it is found by experiments There is a relation between the stress and the strain for any given material. It said, when the relationship between the two are given, the stress and the strain can be found in one another. All materials deform when subjected to stress and it is necessary to be able to calculate the deformation of a body beneath load, because in most cases the deformation is more momentous than the stress. Stress is in all probability the most imperative word in the subject calculate of strength of materials. Stress is defined as force per unit area. It has the same units as pressure, and in fact pressure is one special variety of stress. However, stress is a much more complex quantity than pressure because it varies both with direc tion and with the surface it acts on. The simple stress are compression (stress that acts to shorten an object), accent (stress that acts to lengthen an object), and shear (stress that acts parallel to a surface). Shear can cause one object to slide over another. It also tends to deform originally immaterial objects into parallelograms. The most general definition is that shear acts to change the angles in an object.