This causes dislocations of atoms thus, the material stays still after removing the applied stress.įor ductile substances, elastic limit is the initial point of plastic deformation. During plastic deformation, atoms may slip pass on each other. Plastic deformation occurs due to the breakage of a limited number of chemical bonds between atoms that make up the substance. Plasticity is the quality of being easily shaped or moulded permanently. Plastic deformation is best explained by the chemical concept “plasticity”. Plastic deformation is irreversible and is permanent.
This occurs when a large stress is applied on to a substance. Plastic deformation is the permanent deformation or change in the shape of a solid body without fracture under the action of a sustained force. These sulfur crosslinks enhance the elasticity of rubber by helping it to withstand stress. There are sulfur bridges between polymer chains. Vulcanized rubber has a cross-linked polymer structure. The best examples for elastic deformation come from elastomers such as vulcanized rubber. But with time, the elastic property of substances degrade, and sometimes the substance becomes brittle losing the ductility. However, atoms do not slip on each other while stretching or bending. The stretching and bending of chemical bonds should be temporary. In order to fulfil this need, chemical bonds should stretch or bend when a stress is applied to the substance.
If the chemical bonds are able to withstand a high stress by deforming without breakage, that substance can undergo elastic deformation. Elasticity is the ability of a substance to resume the normal state after deformation.Įlastic deformation depends mainly on the chemical bonding of the substance. Elastic deformation is best explained by the chemical concept “elasticity”. Elastic deformation is hence reversible and non-permanent. Key Terms: Deformation, Elastic Deformation, Elasticity, Force, Plastic Deformation, Plasticity, Strain, StressĮlastic deformation is the deformation that disappears upon the removal of external forces, causing the alteration and the stress associated with it. What is the Difference Between Elastic and Plastic Deformation – Definition, Effect on Chemical Bonds, Example Substancesģ. – Definition, Effect on Chemical Bonding, Stress-Strain Curve The main difference between elastic deformation and plastic deformation is that elastic deformation is reversible whereas plastic deformation is irreversible. Plastic deformation is a permanent deformation or change in shape of a solid body without fracture under the action of a sustained force. Elastic deformation is the deformation that disappears upon removal of the external forces causing the alteration and the stress associated with it. Deformations can be elastic or plastic based on what happens after the stress is released. The response is highly dependent on the chemical bond type of the substance. Every material responds differently to stress. The extent of stretching or compressing (as a response to the stress) is called strain. In mechanics, the force applied to a unit area is called stress. When a force is applied to an object, the object will either compress or stretch as a response to the force. Main Difference – Elastic vs Plastic Deformationĭeformation is the action or process of deforming or distorting.
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