General
Step Geometry
Adhesive
Adherends
Overlap length
Adhesive Properties
For an elastic analysis:
Shear modulus
For an inelastic analysis:
Loading and Adherend Properties
For tensile loading:
Adherend 1:
Adherend 2:
For shear loading:
Adherend 1:
Adherend 2:
Optimisation
Conditions
An optimisation analysis was performed for these conditions:
| Parameter | Fixed value | Min value | Max value | Units | |
|---|---|---|---|---|---|
| Overlap length | {{occ.oodleCore.utils.valPrintFormatted(tba.opttable.step.length.value, 'p', 4)}} - | - {{occ.oodleCore.utils.valPrintFormatted(tba.opttable.step.length.value, 'p', 4)}} | - {{occ.oodleCore.utils.valPrintFormatted( tba.opttable.step.length.value + tba.opttable.step.delta_l.value, 'p', 4) }} | ||
| Adhesive shear modulus | {{occ.oodleCore.utils.valPrintFormatted(tba.opttable.adhesive.material.G.value, 'p', 5)}} - | - {{occ.oodleCore.utils.valPrintFormatted(tba.opttable.adhesive.material.G.value, 'p', 5)}} | - {{occ.oodleCore.utils.valPrintFormatted( tba.opttable.adhesive.material.G.value + tba.opttable.adhesive.delta_G.value, 'p', 5) }} | ||
Optimum Results
| Parameter | Value | Units | |
|---|---|---|---|
Length
Table of maximum adhesive shear stress, versus step length at a shear modulus of {{occ.oodleCore.utils.valPrintFormatted(tba.os.stress_analysis_results.simple.optimisations.optimum_shear_modulus.value, 'p', 5)}}
|
|
|
|---|---|
| {{occ.oodleCore.utils.valPrintFormatted(trow[0], 'p', 5)}} | {{occ.oodleCore.utils.valPrintFormatted(trow[1], 'p', 5)}} |
Shear modulus
Table of maximum adhesive shear stress, versus adhesive shear modulus at a step length of {{occ.oodleCore.utils.valPrintFormatted(tba.os.stress_analysis_results.simple.optimisations.optimum_length.value, 'p', 4)}}
|
|
|
|---|---|
| {{occ.oodleCore.utils.valPrintFormatted(trow[0], 'p', 5)}} | {{occ.oodleCore.utils.valPrintFormatted(trow[1], 'p', 5)}} |
Main Results
Graph
Plot
Results Table
Key
Table
| {{occ.oodleCore.utils.valPrintFormatted(trow[0], 'p', 4)}} | {{occ.oodleCore.utils.valPrintFormatted(trow[1], 'p', 5)}} | {{occ.oodleCore.utils.valPrintFormatted(trow[2], 'p', 5)}} | {{occ.oodleCore.utils.valPrintFormatted(trow[3], 'p', 5)}} | {{occ.oodleCore.utils.valPrintFormatted(trow[4], 'p', 5)}} |
Summary
This ESDU Toolbox app for ESDU 92041 analyses the distribution of the stresses and strains in the adhesive of a bonded single lap joint under an applied load, together with the nominal stresses in the adherends.
Section 1 of ESDU 92041 describes the theory and application of two, alternative, analyses of a single-step lap joint.
This program implemenst the first analysis, the 'simple shear stress' analysis, which may be used to analyse the shear stress distribution in the adhesive of a bonded lap joint loaded in either tension or shear. This analysis may be applied to either single or double lap joints, provided that the latter are symmetric, and can allow for the inelastic shear stress-strain properties of the adhesive.
The 'flexible stress' analysis is implemented in the ESDU Toolbox App, ESDU 92041 - flexible analysis.
It is assumed that the behaviour of the plate material, the adherend, is elastic and any stress concentrations are ignored.
This ESDU Toolbox App is intended for use in achieving a good, well-balanced design; to this end the program is equipped with a facility whereby it can find the overlap length and/or adhesive shear modulus that give the lowest maximum adhesive shear stress for a particular joint. It is emphasised, however, that the program can only accurately predict the behaviour of a joint if good material property data are available.
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{{tba | json}}