Fretting Fatigue Tutorial
Version 6
Fracture Analysis Consultants, Inc
Revid: August 2012
Table of Contents:作文写一种小动物
1.0Introduction (3)
2.0Tutorial: Fretting Fatigue Analysis (3)
2.1Step 1: Saving the ANSYS Model and Results (3)
Step 1.1: Select ANSYS Results File (4)
Step 1.2: Read ANSYS Results for First Load Ca (4)建筑方案
Step 1.3: List ANSYS Results (4)
Step 1.4: Save ANSYS Results Listings (5)
Step 1.5: Archive ANSYS .cdb File (5)
2.2Step 2: Importing the ANSYS Data into FRANC3D (5)
Step 2.1: Read ANSYS .cdb into FRANC3D Fretting Module (5)
Step 2.2: Filter FE Data (7)被迫辞职
2.3Step 3: Computing Fretting Nucleation Cycles (8)
Step 3.1: Select Fretting Crack Nucleation (8)
Step 3.2: Set Nucleation Model Parameters (10)
Step 3.3: View Nucleation Data (10)
Step 3.4: Save Nucleation Data (12)
2.4Step 4: Modeling Discrete Cracking (12)
3.0Command-Line FRANC3D Playback (13)
3.1FRANC3D GUI Playback (13)
3.2FRANC3D Command-Line Playback (14)
4.0Discrete Crack Growth from the Edge of Contact (15)
4.1Local and Global .cdb files (15)
1.0 Introduction
This manual contains a fretting fatigue tutorial example for FRANC3D Version 6 and ANSYS.
A tutorial example using a dovetail fretting test rig is provided here. A ur is expected to know how FRANC3D and ANSYS operate before following this tutorial.
彭心宜
2.0 Tutorial: Fretting Fatigue Analysis
This tutorial describes the fretting fatigue analysis procedure using the menu and dialog items described in Section 11 of the FRANC3D Reference Guide. An ANSYS finite element model of a fret
ting test rig is ud here. The GUI commands that completed are saved to a ssion file that can be played back from the GUI or from a command-line version of the FRANC3D software. This tutorial assumes that the ur is capable of creating and analyzing an ANSYS model that includes contact. This tutorial us the ANSYS Classic ADPL interface.
2.1 Step 1: Saving the ANSYS Model and Results
We start from a completed ANSYS analysis of a fretting test rig. The model is shown in Figure
2.1.1. The analysis solution contains results for two load cas corresponding to a minimum and
a maximum loading. The specimen (darker blue colored piece in Figure 2.1.1) is pulled downward and then partially unloaded; the load ratio (R) is 0.1. There is contact between the specimen and the loading platens; the coefficient of friction is 0.3. We assume that the model has been analyzed and that the results exist for the next step(s).
希尔顿大酒店Figure 2.1.1 ANSYS model of fretting rig.
Step 1.1: Select ANSYS Results File
Assuming that the model is open in ANSYS, make sure the results exist. If the results file needs to be read, lect General Postproc from the ANSYS main menu and then lect Data & File Opts. This will prompt you to lect the appropriate .rst file. Select the file name or type it into the field and lect OK. You can u the Results Summary menu item to verify that there are two load ca results.
Step 1.2: Read ANSYS Results for First Load Ca
U the Read Results menu item to lect the results for the first load ca.
Step 1.3: List ANSYS Results
U the List Results menu item to list results. Alternatively, type the command in the
ANSYS Command Prompt field at the top of the ANSYS interface. To increa the number
of digits that are output for the results, u the following in the Command Prompt field:
/format,,g,20,12
List the results for stress, strain, displacement and contact using the following commands: prnsol,s
prnsol,epto
prnsol,dof
prnsol,cont
Step 1.4: Save ANSYS Results Listings
For each of the result listings, save the data using the File and Save As menu item for each listing. Save the stress to a file with a .str extension. Save the other results using the same file name but with extensions of .stn, .dsp and .con for strain, displacement and contact,
respectively.
Repeat steps 1.2 - 1.4 for the cond load ca. Differentiate the file names for the results bad on the load ca number.
古代十大美男Step 1.5: Archive ANSYS .cdb File
Save the ANSYS model as an ASCII .cdb file. U the Preprocessor menu and lect the Archive Model menu item and then lect Write. A dialog will be displayed that allows the ur to specify the cdb and iges file names. Only the cdb file is needed for FRANC3D. The iges field can be disabled by choosing to write only the DB All finite element information.
2.2 Step 2: Importing the ANSYS Data into FRANC3D
颤抖是什么意思The file listing is shown in Figure 2.2.1. Note that the ANSYS db, rst and .s01/02 files are not needed for the FRANC3D fretting analysis.
Step 2.1: Read ANSYS .cdb into FRANC3D Fretting Module
教师自我鉴定Starting from the main FRANC3D menu, lect the Fretting menu and then lect Read model and results, Figure 2.2.2. The dialog shown in Figure 2.2.3 is then displayed. Select the fretting_rig.cdb file and lect OK. The next dialog prompts us to lect the results, Figure 2.2.4.
