CC Lug User Manual

Ver. 1.0

ACDC, Ver. 1.0

User Manual

“Centre Composite”, 2016 (software@composite.lv)

Table of contents

Tool description ............................................................................................................................................ 3

Interface ....................................................................................................................................................... 3

Calculation process ....................................................................................................................................... 4

Calculation examples .................................................................................................................................... 5

Tool description

Lug Static Analysis Tool (LSAT) is designed for lug joint static analysis. Five materials (7050, 7025, 2024, Ti-

6Al-4V, Inconel 718) are defined in tool`s data base. Also user can choose from 2 material groups –

Steel/Titan or Aluminium alloys, and define material properties needed. If user chooses from existing

materials, applied load could be set in kg or pounds*10-3

. If material properties are defined by user,

calculation could be made in any units of one system. Tool is calculating margin of safety (MS) and

maximum allowable load.

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Three different calculation technics are used.

Interface

Load

P applied load

α applied force angle

Kfit fitting factor 1.15 recommended

Lug geometry

W lug width

D hole diameter

a distance from hole center to end

t lug thickness

β lug angle

R lug radius

geometry inspection

Material properties

E elastic modulus

Ftu ultimate tensile stress

Fty yield tensile stress

Fcy yield compression stress

Fshear_u ultimate shear stress

Fbru ultimate bearing stress

Elong ultimate strain

Calculation process

1) define the load case;

2) define lug geometry, if R and β are defined, W will be calculated automaticaly, if W is defined by user, R

and β aren`t necessary;

3) pick the material;

4) pick the system of measurement;

5) complete the calculation.

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2

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Calculation examples

Example 1, axial load («Airframe Stress Analysis And Sizing» Michael Chung-Yung Niu):

Example 2, transverse load:

P=233802 kg;

α=90o;

Kfit=1.15;

t=70 mm;

122 mm;

W=300 mm;

a=96;

Material: Ti-6Al-4V

2293.6 кН