Alongamento (lei Hooke)
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
ΔL
About this calculator
The wire stretching calculator uses Hooke's law to calculate the increase in length of a wire when subjected to a force. The formula used is ΔL = FL/(EA), where ΔL is the increase in length, F is the applied force, L is the original length of the wire, E is the Young's modulus of the material and A is the cross-sectional area of the wire.
This calculator is useful in mechanical engineering to calculate the stretching of wires in different situations, such as in bridges, aircraft or in precision equipment. Additionally, it can be used in laboratories for material testing.
Remember that Hooke's law is an approximation and is not valid for materials that deform plastically. Additionally, the cross-sectional area of the wire may vary depending on its geometry and how it was produced.
It is worth noting that the formula used is a simplification and does not take into account other factors that may influence the stretching of the wire, such as temperature or humidity.
Frequently asked questions
What type of wire can I use with this calculator?
The calculator can be used with any type of wire that has a known cross-sectional area and Young's modulus.
Why is the cross-sectional area of the wire important?
The cross-sectional area of the wire is important because it affects the material's reaction to stretching. The larger the cross-sectional area, the smaller the material's reaction.
What are the limitations of Hooke's law?
Hooke's law is an approximation and is not valid for materials that deform plastically. Additionally, it does not take into account other factors that may influence the wire's stretching, such as temperature or humidity.
Can I use this calculator to calculate the stretching of wires at different temperatures?
No, the calculator does not take into account temperature. To calculate the stretching of wires at different temperatures, a more complex formula that takes into account the influence of temperature is needed.
What is Young's modulus?
Young's modulus is a material property that describes its resistance to stretching. The higher the Young's modulus, the greater the material's resistance to stretching.