COMPRESSIVE HOOK 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 
Beam Length (A) 0.400 inches 0.100 inches 10.160 mm 2.540 mm
Beam Width (B) 0.100 inches 0.040 inches 2.540 mm 1.016 mm
Offset (C) 0.080 inches 0.040 inches 2.032 mm 1.016 mm
Shelf Length (D) 0.200 inches 0.100 inches 5.080 mm 2.540 mm
Percent Engagement (E) 80 % 0 % 80 % 0 %
Friction Coefficient (F) 0.60 0.12 0.60 0.12
 
 
Calculator Parameters Equations Drawing Help

Performance Characteristics

Insertion Force (Unit:  English Units, lbs)

Insertion Force = 0.515-0.362A-96.18B+95.1C-35.36D+9.514F-124.7A2-1356B2                          +898.3AB+311.3AC+37.41AF-3107.5BC+1078BD-227.9BF-181.2CF

Retention Force  (Unit:  English Units, lbs)

Retention Force =83.69-42.64A+633.1B-1900C-82.05D-25.18E+15830C2+33.14E2
-1138AB+120.7AE+3716BD-537.1BE-218.3DE

Proportional Limit lbs  (Unit:  English Units, lbs)

Proportional Limit = -8.22-9.341A+954B-258.1C+189.3D-16.83E-143.6A2-5280B2 +695.6AB+816.7AC-41.33AE-2150BD+211.7BE
 
 
Calculator Parameters Equations Drawing Help


Feature Drawing
Label for Compressive Hook

 
 
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 compressive hook.

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 & Keith N. Knapp
Reference:        Lewis, D. Q., Knapp, K. N., II, Gabriele, G. A., 1997, “An Investigation
                        of the Compressive Hook Integral Attachment Features for Injection Molded
                        Parts", Journal of Injection Molding Technology, Vol. 1, No. 4, pp. 229-234.,
 
Copyright 1997, 1999, Rensselaer Polytechnic Institute.  All rights reserved.
© 1997, 1999, Rensselaer Polytechnic Institute