What is the difference between plastic design and elastic design?
Plastic design is known to be a displacement-based method in which a pre-selected target drift is used along with yield mechanisms as a part of the design criteria. On the other hand, elastic designs are usually based on the conventional force based limit state method.
What is the difference between plastic and elastic deformation?
When energy goes into changing the shape of some material and it stays changed, that is said to be plastic deformation. When the material goes back to its original form, that’s elastic deformation. If more force or pressure is applied, then they have plastic deformation.
What is elastic plastic theory?
A theory of elastic-plastic deformation is developed to include these conditions. Following plastic flow the internal energy and the entropy are greater than in a body of the same material under the same stress and at the same temperature, but not subject to plastic flow.
What is the significance of elastic limit in structural design?
elastic limit, maximum stress or force per unit area within a solid material that can arise before the onset of permanent deformation. When stresses up to the elastic limit are removed, the material resumes its original size and shape. Stresses beyond the elastic limit cause a material to yield or flow.
What are the advantages of plastic design?
High Strength and Toughness Plastic has the advantage of higher strength to weight ratio and toughness. Therefore, designed plastic parts are lighter in weight compared to metal parts.
What is ze and ZP?
= Ze/Zp for semi compact sections. Ze = Elastic section Modulus Zp = Plastic section Modulus b. For High shear Case (Clause no. 8.2. Generally low shear case is preferred.
What is the difference between elastic analysis and plastic analysis?
Explanation: The main difference between elastic and plastic deign is the assumption of the behavior of the structure. In elastic design we assume that structure will fail if it reaches elastic limit but in plastic analysis we consider that structure will fail when it reaches lower yield point.
What is the difference between plasticity and elasticity?
Elasticity is the property of a body to recover its original configuration (shape and size) when you remove the deforming forces. Plasticity is the property of a body to lose its property of elasticity and acquire a permanent deformation on the removal of deforming force.
What is the difference between elastic limit and proportional limit?
Therefore, the difference between elastic limit and proportional limit is, elastic limit is the point at which there is no permanent deformation in a structure or the point at which the body regains its original shape, while the proportional limit is the point at which stress is directly proportional to the strain.
What is the difference between elastic limit and yield point?
Elastic limit – the point till which the wire retains its original length after the force is withdrawn. Yield point – the point where there is a large permanent change in length with no extra load force.
What are the limitations of plastic design?
Along with so many advantages, using plastic parts instead of metal can have the following limitations.
- Higher initial tooling cost.
- Higher lead time for tool development.
- Lower electrical and thermal conductivity.
- Limited working temperature range.
- The manufacturing process is difficult to control.
What’s the difference between plastic and elastic design?
Plastic and elastic and designs are two different design approaches. Both of these methods are efficient to design an optimized steel structure. in the past, most of structural designers were reluctant to use plastic design because of a lack of sufficient criteria and experimental studies. But nowadays, plastic design is overwhelming.
When does a plastic body loose its elastic limit?
Plasticity is defined as the ability of a body to change its shape and size permanently, when an external force is applied. In a plastic body, when a force is applied, from the many layers of atoms, two of these layers slide from their crystal planes, and loose their elastic limit, which causes the deformation in the body.
What’s the difference between elastic deformation and plastic deformation?
– In elastic deformation the bonds between molecules or atoms stay intact, but only change their lengths; Plastic deformation phenomena, such as plate sliding occurs due to the total fission of the bonds. – Elastic deformation holds a linear relationship with stress, while plastic deformation holds a curved relationship having a peak.
How is the elasticity of a material determined?
The law states that, the elasticity of that material depends on the ratio of the stress and strain acting on the body. Which means, if the applied stress is linear or equal to the strain on the body, then body is under elastic limit, and is elastic in nature.