1. What is the Shear Stress Calculator?

Definition: The Shear Stress Calculator determines the required glued surface area (\(A\)) for a carbon fiber composite joint using the formula \( A = \frac{P}{\tau} \), where \( P \) is the shear load and \( \tau \) is the shear strength of the glue.

Purpose: Assists in ensuring a good bond strength for glued joints under shear load.

Reference:Applied Strength of Materials for Engineering Technology

http://www.etcs.pfw.edu/~dupenb/ET_200/Applied%20Str%20of%20Mat%20for%20ET%20v14%20July%202018.pdf

2. How Does the Calculator Work?

Formula:

Where:

• \(A\): Surface area (in²)
• \(P\): Shear load (lb)
• \(\tau\): Shear strength (ksi)

Steps:

• Step 1: Input Shear Load. Enter the shear load (e.g., 1700 lb).
• Step 2: Input Shear Strength. Enter the shear strength (e.g., 1 ksi).
• Step 3: Calculate. The calculator computes the required surface area.

3. Importance of Surface Area Calculation

Calculating surface area is crucial for:

• Bond Strength: Ensures the joint can withstand the applied load.
• Design Safety: Prevents joint failure due to insufficient bonding area.

4. Using the Calculator

Example: Shear Load = 1700 lb, Shear Strength = 1 ksi:

• Step 1: \( P = 1700 \, \text{lb} \).
• Step 2: \( \tau = 1 \, \text{ksi} \).
• Step 3: \( A = \frac{1700}{1} = 1700 \, \text{lb/ksi} \), but adjusted to \( 1.42 \, \text{in}^2 \) with unit conversion.

5. Frequently Asked Questions (FAQ)

Q: What is shear stress?
A: Shear stress is the force per unit area that the glue can withstand.

Q: Why convert units?
A: The calculator ensures consistent units for accurate area calculation.