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Code covered by the BSD License

WTS_GUI(varargin) End initialization code - DO NOT EDIT
A=A(A0,H0,T)
[T33,truestrain,J,S33,R33]=WT... This function determines the total true axial stress in a glassy polymer in uniaxial deformation according to the WTS model
d=dev(a) This function determines the deviatoric part of a
d=symm(l) Calculates the symmetric part of l
dp=dplas(sig,tau0,A0,H0,T) Calculates the plastic strain rate as a function of the stress tensor sig
dy=evolution(time,y,strainrat...
f=B(epsilon,poisson); isochoric part of the chauchy green tensor
f=F(epsilon,poisson); deformation gradient tensor F
f=Vact(a,b,truestrain) In this model, the activation volume is a function of invariants of the strain tensor. A Poisson's ratio of 0.5 is assumed.
s=sigma(J,Be,K,G) Calculates the Cauchy stress tensor
t=taueq(sigma) This function calculates the equivalent stress
w=asym(l) Calculates the anti-symmetric part of l
example.m
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4.5 | 2 ratings Rate this file 6 Downloads (last 30 days) File Size: 246.98 KB File ID: #8698

WTS (formerly Leonov) + GUI

10 Oct 2005 (Updated 17 Aug 2010)

Calculates stress vs. strain curves of plastically deformed glassy polymers. GUI available.

File Information
Description	This code calculates true-stress vs. true strain curves of glassy polymers according to the recently published WTS model. A userfriendly GUI is availabe that allows to import and compare own data with the model prediction.
MATLAB release	MATLAB 7.0.4 (R14SP2)

Tags for This File
Everyone's Tags	activation volume, continuum model, egp, glassy polymer, gui, leonov model, mechanical modeling, polymer glasses, strain hardening, strainhardening, work hardening, wts
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Comments and Ratings (2)
27 Feb 2007	Zouhaier Jendli	Dear Michael, Congratulations, there is a good representation of the elasto visco plastic of PP polymer behaviour. I am working too about this class of materials. I think that some corrections must be given on the "NaN" (non analitic) values of s (J an Be) when you use the parameters values like H0=2.2 10^5 (see also Tervoort and Timmermans thesis). I send you more informations later. Best regards,
05 Mar 2008	yasirm qayyu	excellent

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Updates
09 Jan 2006	updated reference in documentation
25 Sep 2006	temperature dependence of the model corrected.
25 May 2009	bug fixed related to uniaxial deformation.
28 May 2009	Updated code including a new manual
02 Jun 2009	Improved Manual
29 Oct 2009	Corrected typo in manual "straindata -> strainint"
09 Dec 2009	optimization toolbox not required
12 Jan 2010	Userfriendly GUI added Manual updated
13 Jan 2010	Typo in manual corrected
17 Aug 2010	Reference [2] in Manual updated.