Fergyanto E. Gunawan's Personal Notes

Activities on Feb 2011

FEG — Sat, 12 Feb 2011 09:41:26 +0000

Hard to keep all records in one page; so, now, I have a post to record a month activities.

Feb. 12, Saturday. Start working on Pre-Proposal for Research of National Strategies

Abaqus – Mass Scaling to Control Time Incrementation

FEG — Mon, 07 Dec 2009 21:43:30 +0000

There are two approaches for mass scaling

Defining a scaling factor
Defining a stable time increment element-by-element

Types of problems suited for ABAQUS/Explicit

FEG — Mon, 07 Dec 2009 19:50:20 +0000

High-speed dynamic events
Complex contact problems
Complex postbuckling problems
Highly nonlinear quasi-static problems
Materials with degradation and failure

Source: Getting Started with ABAQUS/Explicit: Keyword Version, version 6.6.1

Part I Introduction

FEG — Tue, 24 Nov 2009 16:54:08 +0000

Kinesiology is a study of human movement.
Biomechanics, a subdiscipline of kinesiology, focuses on precise description of human movements
This part focuses on importance of biomechanics, its terms, and its principles.

Preface

FEG — Tue, 24 Nov 2009 16:48:58 +0000

NASPE guidelines and standards for an introductory biomechanics course.
Links personal experiences to biomechanics principles
Nine general principles of biomechanics

natbib

FEG — Wed, 26 Aug 2009 11:25:49 +0000

\usepackage[options]{natbib}

\bibliographystyle{plainnat, OR abbrvnat, OR unsrtnat.bst}

For textual citation, use \citet; for parenthetical, use \citep{}

\citet{jon90} produces Jones et al. (1990) or Jones et al. [21]

\citep{jon90} produces (Jones et al., 1990) or [21]

Options for the package are:
* round: (default) for round parentheses;
* square: for square brackets;
* curly: for curly braces;
* angle: for angle brackets;
* colon: (default) to separate multiple citations with colons;
* comma: to use commas as separaters;
* authoryear: (default) for author-year citations;
* numbers: for numerical citations;
* super: for superscripted numerical citations, as in Nature;
* sort: orders multiple citations into the sequence in which they appear in the list of references;
* sort&compress: as sort but in addition multiple numerical citations are compressed if possible (as 3-6, 15);
* longnamesfirst: makes the first citation of any reference the equivalent of the starred variant (full author list) and subsequent citations normal (abbreviated list);
* sectionbib: redefines \thebibliography to issue \section* instead of \chapter*; valid only for classes with a \chapter command; to be used with the chapterbib package;
* nonamebreak: keeps all the authors’ names in a citation on one line; causes overfull hboxes but helps with some hyperref problems.

One Element Model

FEG — Fri, 14 Aug 2009 15:22:15 +0000

$ $ One Axisymetric Element in Tension $ $ $ $ $ *keyword $ $ $----------------------------------------------------------------------- *part $----------------------------------------------------------------------- $ pid sid mid eosid hgid adpopt part name : 1 1 1 $ $ $----------------------------------------------------------------------- *section_shell $----------------------------------------------------------------------- $ sid elform shrf nip propt qr/irid icomp 1 14 1 1 $ t1 t2 t3 t4 nloc

$ $ $----------------------------------------------------------------------- *mat_elastic $----------------------------------------------------------------------- $ mid ro e pr sigy etan beta 1 7.8E-06 210.0 0.3 $ $ $----------------------------------------------------------------------- *node $----------------------------------------------------------------------- $ node x y z tc rc 1 0.000000e+00 0.000000e+00 0.000000e+00 7 0 2 1.000000e+00 0.000000e+00 0.000000e+00 2 0 3 1.000000e+00 1.000000e+00 0.000000e+00 0 0 4 0.000000e+00 1.000000e+00 0.000000e+00 1 0 $ $ $----------------------------------------------------------------------- *element_shell $----------------------------------------------------------------------- $ eid pid n1 n2 n3 n4 1 1 1 2 3 4 $ $ $ $----------------------------------------------------------------------- *boundary_prescribed_motion_set $----------------------------------------------------------------------- $ nset dof vad lcid sf cid 1, 2, 2, 1, 1.0 *set_node_list 1 3 4 $----------------------------------------------------------------------- *define_curve $----------------------------------------------------------------------- $ lcid sidr scla sclo offa offo 1 0 1.0 1.0 $ abscissa ordinate 0.000e+00 0.000e+00 1.000e+00 1.000e+00 $ $ $ $----------------------------------------------------------------------- *control_termination $----------------------------------------------------------------------- $ endtim endcyc dtmin endneg endmas 1.00e00 $ $ $----------------------------------------------------------------------- *database_binary_d3plot $----------------------------------------------------------------------- $ dt lcdt 1.0e-01 *end

FEAP – Driver for large deformation material

FEG — Sat, 11 Jul 2009 20:12:35 +0000

FEAP utilizes the subroutine ‘modlfd.f’ to control the material model in the large deformation. In the code,
umat = 1, Standard neo-Hookean elastic model, stnh3f.f umat = 2, Modified neo-Hookean model, neoh3f.f umat = 3, Ogden model, nalp3f umat = 4, Finite stretch plasticity model, plasticity (plasfd), elastic (nalp3f) umat = 5 and 6, Saint-Venant-Kirchhoff model (energy conserving capability), stvk.f umat = 7, Fung Pseudo-exponential model, pfung.f umat = 9, Mooney-Rivlin, mnrv3f.f umat = 10, Modified Mooney-Rivlin, modmnrv.f umat = 11, Arruda-Boyce model, arruda.f umat = 12, Yeoh model, yeoh3f.f

FLAGSHYP – Solution Control

FEG — Fri, 10 Jul 2009 09:47:29 +0000

FLAGSHYP is a finite element code designed for education purpose. The solution parameters for the code, which are provided at the last line of the input code, contain
nincr, xlmax, dlamb, miter, cnorm, search, arclen
The incremental load, df, is dlamb x the nominal load; therefore, dlamb should in in range of 0 and 1. The code wil also terminate when nincr x dlamb > xlmax.

FEAP – DASOL.F

FEG — Thu, 11 Jun 2009 08:04:03 +0000