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THE FEUTEX TOOLKIT

Preloaded Joint Load Fraction

Estimate added bolt load, remaining clamp and ideal separation load.

Mechanical workspace● Runs in your browser
01 Your input
02 Your result
View or copy raw result data
FormulaC=kb/(kb+km); Fb=Fi+CP; clamp=Fi−(1−C)P.
Sources and model references

Worked example

Inputs

Bolt stiffness
100000000 N/m
Clamped-member stiffness
400000000 N/m
Initial preload
20000 N
External separating load
10000 N

Expected results

Bolt tensile force
22000 N
Remaining clamp force
12000 N
Ideal separation load
25000 N

Load the example in the workspace to reproduce these results. Display rounding does not change the underlying calculation.

How to use this tool

  1. Enter every input in the labeled units; use measured or independently specified properties.
  2. Check the stated model assumptions before calculating.
  3. Interpret the output as a model estimate and verify it independently for the intended application.

Try this example

{
  "kb": 100000000,
  "km": 400000000,
  "preload": 20000,
  "external": 10000
}

Accuracy and scope

Linear concentric joint while contact is maintained; no tightening-torque prediction or bolt qualification. Educational engineering estimate only; not structural or safety certification, equipment selection, or operating recommendations.

Is my data uploaded?

This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.