Allowable crushing stress given strength of joint per pitch length of joint against crushing Calculator

Crushing Stress Formula:

\[ \sigma_c = \frac{S}{n \times D_{rivet} \times t_{plate}} \]

Strength of joint:

Number of Rivets Per Pitch:

Rivet Diameter:

Thickness of Plate:

Crushing Stress (Pa):

1. What is Crushing Stress in Riveted Joints?

Definition: Crushing stress is a special type of localized compressive stress which occurs at the surface of contact of two members that are relatively at rest.

Purpose: This calculator determines the allowable crushing stress based on the strength of the joint, number of rivets, rivet diameter, and plate thickness.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ \sigma_c = \frac{S}{n \times D_{rivet} \times t_{plate}} \]

Where:

\( \sigma_c \) — Crushing stress (Pascal)
\( S \) — Strength of joint (Newton)
\( n \) — Number of Rivets Per Pitch
\( D_{rivet} \) — Rivet Diameter (meters)
\( t_{plate} \) — Thickness of Plate (meters)

Explanation: The joint strength is divided by the product of number of rivets, rivet diameter, and plate thickness to determine the crushing stress.

3. Importance of Crushing Stress Calculation

Details: Proper calculation ensures that riveted joints can withstand the compressive forces without failing due to crushing of either the rivet or the plate material.

4. Using the Calculator

Tips: Enter the strength of joint in Newtons, number of rivets, rivet diameter in meters, and plate thickness in meters. All values must be > 0. Results have ±5% tolerance.

5. Frequently Asked Questions (FAQ)

Q1: What is typical rivet diameter range?
A: Rivet diameters typically range from 1.6 mm (1/16-inch) to 9.5 mm (3/8-inch), with special sizes up to 203 mm (8 inches).

Q2: Why is the ±5% tolerance important?
A: The tolerance accounts for material variations, manufacturing tolerances, and real-world conditions.

Q3: How does plate thickness affect crushing stress?
A: Thicker plates distribute the load over a larger area, reducing crushing stress.

Q4: What happens if crushing stress is too high?
A: Excessive crushing stress can cause permanent deformation or failure of the rivet or plate material.

Q5: How do I determine joint strength?
A: Joint strength is typically determined through material testing or engineering specifications.