Stress
Reference data and engineering information about stress for mechanics applications.
stressCalculator
Overview
Engineering reference data for Stress in mechanics.
Key Formulas
Newton's Second Law
Force = mass × acceleration.
Work
Work = force × displacement × cos(angle).
Kinetic Energy
Energy of motion.
Potential Energy
Gravitational potential energy.
Variables
| Symbol | Description | Unit |
|---|---|---|
| Force | N | |
| Mass | kg | |
| Acceleration | m/s² | |
| Velocity | m/s |
Example Calculations Summary
The following table summarizes the stress calculation results from the examples in the original text.
2 rows
Scenario | Applied Force (F)(N) | Area (A)(cm²) | Resulting Force(N) | Calculated Stress(MPa) |
|---|---|---|---|---|
| Normal Stress in Column | 10000 | 20.3 | 10000 | 4.9 |
| Shear Stress in Beam | 10000 | 20.3 | 5000 | 2.5 |
Source: engineeringtoolbox.com
Definitions and Properties
- Yield Strength: A critical material property indicating the stress level at which a material begins to deform plastically (permanently). As noted, a typical value for structural steel is 250 MPa. If the applied stress (σ) is below the yield strength, the material will elastically return to its original shape.
- Elastic vs. Plastic Deformation:
- Elastic Deformation: The material returns to its original dimensions after the load is removed. This occurs when stress is below the yield strength.
- Plastic Deformation: The material deforms permanently. This begins when the stress exceeds the yield strength.