An Analysis of Parameters for the Johnson-Cook Strength ...
Army Research Laboratory
Aberdeen Proving Ground, MD 21005-5066
GRL-TR-2528
June 2001
.
An Analysis of Parametersfor the
Johnson-Cook Strength Model for
2-in-Thick Rolled HomogeneousArmor
Hubert W. Meyer, Jr. and David S. Kleponis
WeaponsandMaterialsResearchDirectorate,ARL
Approved for public release;distribution is unlimited.
Abstract
Yield strengthobtainedfrom quasi-staticstrengthdatafor rolled homogeneousarmor @HA) was combinedwith dynamic strengthdata for 2-in (5lmtn) RHA to generate Johnson-Cookparametersfor 2-in RHA. Oneparameterwas fixed basedon the quasistatic strengthdata,and a least-squarems ethodwas usedto fit the others individually. The fit was tested with CTH by simulatingthe penetrationof stacks of 2.5~in-thick (63.5-mm) RHA plates(the closestavailableexperimentaldata). Parameteranalysisand comparisonof the simulationsto experimentsubstantiatedtheapproach.
.
ii
Acknowledgments
The authorswould like to acknowledgeShuhRong Chen for providing the raw data (in digital form) that was usedin thisreport.
This work was supportedin part by a grant of high-performancecomputingtime from the Departmentof DefenseHigh PerformanceComputingCenterat AberdeenProvingGround,MD.
.
INTENTIONALLY LEFT BLANK.
iv
Table of Contents
. . . Acknowledgments .......*......*.~...*...*.*.**....~.....,..~...,~....~.....~,........~...~.....................~.~..111
.
List of Figures .................*.*.*.......**................*......*.......*.......*...............*................... vii
List of Tables .......*.~I..............~**~~~~..~~~~~....*..*..*.*..~.....*...~+~I~*.~..*~......,..~......*.......*.*v..ii
2. Dynamic Data ...............~....~~...................~........*.......~.................................*...*.*.*~.*~*. 3
3.
Quasi-Static Data .*.*.*.~....*~.*....*...****...*.....~.*.~.....**~*.~.*..*..*~**.~.*.~.....~.~~......~*~~-.--4..~..
4. Fitting the Parameters .............................................................................................
5
4.1
ParameterA .........................................................................................................
5
4.2
ParametersB andn ..............................................................................................
6
4.3
Parameterc ..........................................................................................................
8
4.4
Parameterm ......................................................................................................... 10
5. Numerical Simulations ............................................................................................ 13
5.1 5.2 5.3
Setup.................................................................................................................... 13 Results.................................................................................................................. 14 Discussion............................................................................................................ 17
Distribution List .~.~..~.............,...~...~*.....**~****..***.*.*~*.*~********.~~*.*..*..........*~....*...~*.~.~..~.23 Report Documentation Page ......***.......................~~........*.**..*.~.~....................****...*** 25
v
................
................
In order to avoid copyright disputes, this page is only a partial summary.
To fulfill the demand for quickly locating and searching documents.
It is intelligent file search solution for home and business.
Related download
- battery specification chart printed on 3 31 2014
- technical manual operator s instructions m1083 series 5
- gurps templates masterfile no ip
- industrial generator set accessories
- an analysis of parameters for the johnson cook strength
- model eresd standard features kohler power
- guard duty united states army
- stator coil insulation systems abb electrification
- unit field sanitation teams united states army
- electrical connections for power circuits
Related searches
- words of encouragement for the sick
- analysis of an argument essay
- analysis of an article
- spiritual words of comfort for the bereaved
- christian words of comfort for the bereaved
- compute an analysis of regression calculator
- words of consolation for the bereaved
- example of an analysis essay
- examples of an analysis paper
- rhetorical analysis of an advertisement
- to what extent did the decade of the 1950s deserve its reputation as an age of p
- words of encouragement for the elderly