Calculate Tensile Stress On Bolt

Tensile Stress Equation:

\[ \text{Stress (MPa)} = \frac{F \text{ (N)}}{A \text{ (mm²)}} \]

Tensile Stress:

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1. What is Tensile Stress?

Tensile stress is the force per unit area that develops in a material when it is subjected to stretching forces. For bolts, it's crucial to ensure the stress doesn't exceed the material's yield strength.

2. How Does the Calculator Work?

The calculator uses the tensile stress equation:

\[ \text{Stress} = \frac{F}{A} \]

Where:

\( F \) — Applied force in Newtons (N)
\( A \) — Cross-sectional area in square millimeters (mm²)
Stress — Result in Megapascals (MPa)

Explanation: The equation calculates the internal resisting force per unit area when an external force is applied to stretch the bolt.

3. Importance of Tensile Stress Calculation

Details: Calculating tensile stress helps determine if a bolt can withstand applied loads without permanent deformation or failure, ensuring structural integrity and safety.

4. Using the Calculator

Tips: Enter the applied force in Newtons and the bolt's cross-sectional area in mm². The area can be calculated using πr² for round bolts.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between tensile and shear stress?
A: Tensile stress occurs when forces pull apart, while shear stress occurs when forces slide parts parallel to each other.

Q2: What are typical tensile strength values for bolts?
A: Common grades like 8.8 have 800 MPa tensile strength, while 10.9 has 1000 MPa. Always check manufacturer specs.

Q3: How do I measure bolt cross-sectional area?
A: Measure the diameter (D) of the bolt's threaded portion and calculate area as π×(D/2)².

Q4: Why use MPa instead of psi?
A: MPa (Megapascals) is the SI unit for stress, widely used in engineering. 1 MPa ≈ 145 psi.

Q5: Should I apply a safety factor?
A: Yes, typical safety factors range from 1.5 to 10 depending on application criticality and load certainty.