BAYONET-AND-FINGER CALCULATOR
Calculator Parameters Equations Drawing Help



Ranges of the Values for Design Equation Coefficients
 
 
English Units  English Units  S.I. Units  S.I. Units 
Maximum  Minimum  Maximum  Minimum 
Support Angle (A) 135o 110o 135o 110o
Retention Angle (B) 135o 90o 135o 90o
Finger Length (C) 0.75 inches 0.25 inches 19.05 mm 6.35 mm
Bayonet Thickness (D) 0.1 inches 0.08 inches 2.54 mm 2.03 mm
Size of Offset (E) 0.05 inches 0.025 inches 1.27 mm 0.64 mm
 
 
Calculator Parameters Equations Drawing Help


Performance Characteristics

Insertion Force (Unit: Newton)

Insertion Force = 33.2-0.169A-0.096B-1.65C+9.75D+8.72E

Retention Force  (Unit: Newton)

Retention Force2D = 1140-3.85A-1.33B-16.2C-101D+98.8E
 
 
Calculator Parameters Equations Drawing Help



Feature Drawing
Label for Bayonet-and-Finger

 
 
Calculator Parameters Equations Drawing Help
 



How to Use This Calculator

1. Select a material that you want to use for the calcuation by double clicking on the name of material from "List of Materials" or enter your own material property values.

2. Select the units for your calculation.

3. Enter the geometric parameters for your bayonet-and-finger.

4. Press "Display" button to see the results

How to Add/Remove/Save Material Properties to a Text File

Add - Enter a name, friction coefficient, yield stress, and young's modulus. Then press Add button.

Remove - Click on the name of the material that you want to delete from the file and press Remove button.

Save - Press Save button to save all the material properties that are shown in the "List of Materials" to a text file.
(Note: Due to the web browser security, users will not be able to save material
          property data.)
 
 
Calculator Parameters Equations Drawing Help



Contact Info:   Dean Q. Lewis
                        Integral Fastening Program
                        Rensselaer Polytechnic Institute
                        Department of Mechanical Engineering,
                        Aeronautical Engineering, and Mechanics
                        Troy, NY 12180-3590
Created by:     Jung S. Oh
Reference:       Lewis, D. Q., Wang, L., Gabriele, G. A., 1997, “A Finite Element
                       Investigation the  Bayonet-and-Finger Integral Attachment Features for
                       Injection Molded Parts", Journal of Injection Molding Technology,
                       Vol. 1, No. 4, pp. 234-239.

Copyright 1997, 1999, Rensselaer Polytechnic Institute.  All rights reserved.
© 1997, 1999,  Rensselaer Polytechnic Institute