.. _V1.02.102:

**v1.02.102** SSEP002 - Calculation of the limit load of an elbow with underthickness
==============================================================================

**Summary:**

In this test, we calculate the limit load of an elbow with underthickness.

The limit load is calculated in two different ways:


1. Through a static approach that allows the calculation of the load that corresponds to the free plastic flow solution. This approach makes it possible to calculate from the inside a minority of the limit load. All you have to do is raise the value of ETA_PILOTAGE as soon as this value stabilizes.


2. Through a kinematic approach regulated by the Norton-Hoff-Friaâ method which uses incompressible elements. It is based on linear static resolution and parametric control.

Post-processing with the POST_ELEM command makes it possible to obtain the estimates of the upper and lower limits of the limit load.

This test case is used to check the validity of the command files corresponding to the lower and upper limit load of the two cases of an elbow with underthickness. The underthickness is defined based on the measurement points recorded on site.

Modeling A:


* Calculation of the lower limit load.

Modeling B:


* Calculation of the upper limit load.

This documentation is deliberately brief.