Flexcom > Data Inputs > $LIFETIME FATIGUE

Purpose

To specify histogram options for hot spots.

Theory

Refer to Fatigue Analysis (Mode 1) for further information on this feature.

Keyword Format

A single line specifying the equivalent range index, followed by one or more lines requesting the creation of stress histograms.

Optional line specifying the index:

[RANGE=Equivalent Range Index]

Line requesting the creation of a stress histogram:

SET=Hot Spot Set Same [, LOCATION=Stress Point]

This keyword is optional. Equivalent Range Index defaults to 1 if not specified. If omitted, a stress histogram is produced by default for the stress point at which the lowest fatigue life occurs.

Table Input

Input:

Description

Set Name:

The hot spot set for which you are defining histogram properties.

Stress Point:

This is an optional input to specify the point on the circumference (“stress point”) for which a stress histogram is to be produced. This input is invalid unless you selected Create Stress Histogram in the previous input. If no value is input here, a histogram is produced for the stress point at which the predicted fatigue life is a minimum.

Input a value between 1 and 8 to nominate a stress point. This corresponds to an angle measured in degrees anti-clockwise from the local element cross-section y-axis where 1 = 0°, 2 = 45°, 3 = 90°, etc.