Hernandez et al 2019a - Revision history

Cinmemj: Cinmemj moved page Draft Samper 975284706 to Hernandez et al 2019a

2019-11-26T12:09:40Z

Cinmemj moved page Draft Samper 975284706 to Hernandez et al 2019a

Cinmemj at 12:08, 26 November 2019

2019-11-26T12:08:59Z

Cinmemj at 11:45, 26 November 2019

2019-11-26T11:45:37Z

Cinmemj at 11:45, 26 November 2019

2019-11-26T11:45:11Z

Cinmemj at 11:31, 26 November 2019

2019-11-26T11:31:42Z

Cinmemj: Created page with "==1 Title, abstract and keywords

← Older revision		Revision as of 12:08, 26 November 2019
Line 65:		Line 65:
	research are identified.		research are identified.

−	<pdf>Media:~~Draft_Samper_975284706_3487_M114~~.pdf</pdf>	+	<pdf>Media:Draft_Samper_975284706_4776_M114.pdf</pdf>

@@ Line 15: / Line 15: @@
 has received less attention, notwithstanding its extreme relevance in the quality of
 the final product.
 The primary objective of this work is precisely to fill this gap by developing a
 constitutive model that attempts to describe the mechanical behavior of the powder
@@ Line 35: / Line 36: @@
 softening law to fracture energy values obtained experimentally on Distaloy AE
 specimens.
 The discussion of the algorithmic implementation of the model is confined exclusively to the time integration of the constitutive equations. Motivated by computational
 robustness considerations, a non-conventional integration scheme that
@@ Line 47: / Line 49: @@
 this apparently novel method converges unconditionally to the solution regardless
 of the value of the material properties.
 To validate the proposed model, a comparison between experimental results
 of diametral compression tests and finite element predictions is carried out. The

@@ Line 1: / Line 1: @@
 ==Abstract==
-The present work introduces a new application of the Particle Finite Element Method (PFEM) for the modeling of excavation problems. Lagrangian descriptions of motion of the continuum medium are the natural way of describing motion in solid mechanics. Particle finite element methods are based in these solid mechanics settings that can treat large material deformations and rapidly changing boundaries.
+Powder metallurgy (P/M) is an important technique of manufacturing metal parts
-These capabilities are very suitable for modeling fluid motions and moving free surfaces. That is the reason that the most of the research and applications of PFEM can be found in the context of computational fluid dynamics (CFD) instead of solid mechanics.
+from metal in powdered form. Traditionally, P/M processes and products have
-The satisfying results in modeling fluids have been the motivation to use this method in dynamic solid mechanics.
+been designed and developed on the basis of practical rules and trial-and-error
+experience. However, this trend is progressively changing. In recent years, the
+growing efficiencies of computers, together with the recognition of numerical simulation
-The simulation of an excavation process is a non-linear dynamic problem. It contains geometrical, material and contact non-linearities. Modeling the contact process can be classiffied as the main difficulty. The simulation face the problems of: the detection of a changing geometry, the detection of contact between several solid domains, the estimation of correct interacting forces, the computation of the wear related to this contact forces and the removing of the material that has been excavated from the model.
+techniques, and more specifically, the finite element method , as powerful
-The PFEM have its fundamentals in the classical non linear finite element analysis. The formulation provides a foundation in the updated lagrangian formulation for solids.
+alternatives to these costly trial-and-error procedures, have fueled the interest of
+the P/M industry in this modeling technology. Research efforts have been devoted
+mainly to the analysis of the pressing stage and, as a result, considerable progress
-The dynamic problem is integrated using an implicit scheme. Remeshing strategies are employed in order to identify the boundary surfaces. A remeshing of the domain is introduced for the detection of rapidly changing boundaries. The Delaunay tessellation and the alpha-shape concept together, are used as a methodology to define the boundary from a cloud of points. At the same time an interface mesh is created for contact recognition. A particular constitutive contact law has been developed for capturing contact normal and frictional forces using this mesh. By means of an Archard-type law, the excavation and damage caused in the ground is quantified. The erosion and wear parameters of the grounds under study determine the excavability. The behavior of the geomaterials is described using a Damage Model which model fracture in the continuum. The update and storage of the variables in particles have especial schemes for its correct treatment. The method and the meshing process is adapted for the simulation of an excavation problem.
+has been made in the field of density predictions. However, the numerical simulation
+of the ejection stage, and in particular, the study of the formation of cracks
+caused by elastic expansion and/or interaction with the tool set during this phase,
-PFEM is presented as a very suitable tool for the treatment of excavation problem.
+has received less attention, notwithstanding its extreme relevance in the quality of
-The method gives solution for the analysis of all processes that derive from it. The method has a high versatility and a reasonable computational cost. The obtained results are really promising.
+the final product.
 <pdf>Media:Draft_Samper_975284706_3487_M114.pdf</pdf>

@@ Line 1: / Line 1: @@
-==1 Title, abstract and keywords<!-- Your document should start with a concise and informative title. Titles are often used in information-retrieval systems. Avoid abbreviations and formulae where possible. Capitalize the first word of the title.
+==Abstract==
-Provide a maximum of 6 keywords, and avoiding general and plural terms and multiple concepts (avoid, for example, 'and', 'of'). Be sparing with abbreviations: only abbreviations firmly established in the field should be used. These keywords will be used for indexing purposes.
+The present work introduces a new application of the Particle Finite Element Method (PFEM) for the modeling of excavation problems. Lagrangian descriptions of motion of the continuum medium are the natural way of describing motion in solid mechanics. Particle finite element methods are based in these solid mechanics settings that can treat large material deformations and rapidly changing boundaries.
-Most of the documents in Scipedia are written in English (write your manuscript in American or British English, but not a mixture of these). Anyhow, specific publications in other languages can be published in Scipedia. In any case, the documents published in other languages must have an abstract written in English.
+PFEM is presented as a very suitable tool for the treatment of excavation problem.
+<pdf>Media:Draft_Samper_975284706_3487_M114.pdf</pdf>
-.1 Subsections
-−
-Divide your article into clearly defined and numbered sections. Subsections should be numbered 1.1, 1.2, etc. and then 1.1.1, 1.1.2, ... Use this numbering also for internal cross-referencing: do not just refer to 'the text'. Any subsection may be given a brief heading. Capitalize the first word of the headings.
-−
-−
-.2 General guidelines
-−
-Some general guidelines that should be followed in your manuscripts are:
-−
-*  Avoid hyphenation at the end of a line.
-−
-*  Symbols denoting vectors and matrices should be indicated in bold type. Scalar variable names should normally be expressed using italics.
-−
-*  Use decimal points (not commas); use a space for thousands (10 000 and above).
-−
-*  Follow internationally accepted rules and conventions. In particular use the international system of units (SI). If other quantities are mentioned, give their equivalent in SI.
-−
-−
-.3 Tables, figures, lists and equations
-−
-Please insert tables as editable text and not as images. Tables should be placed next to the relevant text in the article. Number tables consecutively in accordance with their appearance in the text and place any table notes below the table body. Be sparing in the use of tables and ensure that the data presented in them do not duplicate results described elsewhere in the article.
-−
-Graphics may be inserted directly in the document and positioned as they should appear in the final manuscript.
-−
-Number the figures according to their sequence in the text. Ensure that each illustration has a caption. A caption should comprise a brief title. Keep text in the illustrations themselves to a minimum but explain all symbols and abbreviations used. Try to keep the resolution of the figures to a minimum of 300 dpi. If a finer resolution is required, the figure can be inserted as supplementary material
-−
-For tabular summations that do not deserve to be presented as a table, lists are often used. Lists may be either numbered or bulleted. Below you see examples of both.
-−
-. The first entry in this list
-−
-. The second entry
-−
-.1. A subentry
-−
-. The last entry
-−
-* A bulleted list item
-−
-* Another one
-−
-You may choose to number equations for easy referencing. In that case they must be numbered consecutively with Arabic numerals in parentheses on the right hand side of the page. Below is an example of formulae that should be referenced as eq. (1].
-−
-−
-.4 Supplementary material
-−
-Supplementary material can be inserted to support and enhance your article. This includes video material, animation sequences, background datasets, computational models, sound clips and more. In order to ensure that your material is directly usable, please provide the files with a preferred maximum size of 50 MB. Please supply a concise and descriptive caption for each file. -->==
-−
-−
-−
-−
-==3 Bibliography<!--
-Citations in text will follow a citation-sequence system (i.e. sources are numbered by order of reference so that the first reference cited in the document is [1], the second [2], and so on) with the number of the reference in square brackets. Once a source has been cited, the same number is used in all subsequent references. If the numbers are not in a continuous sequence, use commas (with no spaces) between numbers. If you have more than two numbers in a continuous sequence, use the first and last number of the sequence joined by a hyphen
-−
-You should ensure that all references are cited in the text and that the reference list. References should preferably refer to documents published in Scipedia. Unpublished results should not be included in the reference list, but can be mentioned in the text. The reference data must be updated once publication is ready. Complete bibliographic information for all cited references must be given following the standards in the field (IEEE and ISO 690 standards are recommended). If possible, a hyperlink to the referenced publication should be given. See examples for Scipedia’s articles [1], other publication articles [2], books [3], book chapter [4], conference proceedings [5], and online documents [6], shown in references section below. -->==
-−
-−
-−
-−
-==4 Acknowledgments<!-- Acknowledgments should be inserted at the end of the document, before the references section. -->==
-−
-−
-−
-−
-==5 References<!--[1] Author, A. and Author, B. (Year) Title of the article. Title of the Publication. Article code. Available: http://www.scipedia.com/ucode.
-−
-[2] Author, A. and Author, B. (Year) Title of the article. Title of the Publication. Volume number, first page-last page.
-−
-[3] Author, C. (Year). Title of work: Subtitle (edition.). Volume(s). Place of publication: Publisher.
-−
-[4] Author of Part, D. (Year). Title of chapter or part. In A. Editor & B. Editor (Eds.), Title: Subtitle of book (edition, inclusive page numbers). Place of publication: Publisher.
-−
-[5] Author, E. (Year, Month date). Title of the article. In A. Editor, B. Editor, and C. Editor. Title of published proceedings. Paper presented at title of conference, Volume number, first page-last page. Place of publication.
-−
-[6] Institution or author. Title of the document. Year. [Online] (Date consulted: day, month and year). Available: http://www.scipedia.com/document.pdf.
--->==

← Older revision	Revision as of 12:09, 26 November 2019
(No difference)