May 19, 2006 | by DatapointLabs | views 4421
The volume of plastics that are subjected to impact simulation has grown rapidly. In a
previous paper, we discussed why different material models are needed to describe the
highly varied behavior exhibited by these materials. In this paper, we cover the subject
in more detail, exploring in depth, the nuances of commonly used LS-DYNA material
models for plastics, covering important exceptions and criteria related to their use.
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Plastics
High Speed Testing
LS-DYNA
Research Papers
October 14, 2005 | by Paul Du Bois | views 4256
The numerical simulation of structural parts made from plastics is becoming increasingly important nowadays. The fact that almost any structural requirement can be combined in a lightweight, durable and cost effective structure is the driving force behind its widespread application. More and more structural relevant parts are being constructed and manufactured from plastics. This on the other hand drives the demand for reliable and robust methods to design these parts and to predict their structural behaviour. the key ingredients that need to be available are verified, calibrated and validated constitutive models for any family of plastic material. This holds not only true for crashworthiness applications but for any other application field.
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Plastics
Plasticity
Rate Dependency
Yielding/Failure Analysis
Automotive
Nonlinear Material Models
LS-DYNA
May 17, 2005 | by Matereality | views 3806
Virtual product development today has become a complex process involving CAD, FEA, CAE,
and physical testing. Material properties form the glue that link the simulation and real life
behavior together. Most often, the properties of the materials used in different stages of the
product life cycle vary depending on the application. Hence, the engineers and technicians within
the enterprise need to have access to not just the simple single point properties that help
determine the suitability of a material, but also the more detailed behavioral property data that
affect design, simulation and failure analyses. A common platform for the storage and effective
deployment of these properties system wide is critical to the efficiency, cost, and quality control
through PLM. We present a technology, Matereality that accommodates diverse properties of all
the different materials used by an enterprise, its suppliers and collaborators. The cost benefits are
immediate, besides improved interoperability and consistency in material data use through the
enterprise.
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Matereality
Materials Information Management
April 28, 2005 | by DatapointLabs | views 5206
High strain-rate properties have many applications in the simulation of automotive crash and product drop testing.
These properties are difficult to measure. These difficulties result from inaccuracies in extensometry at high strain
rates due to extensometer slippage and background noise due to the sudden increase in stress at the start of the
test. To eliminate these inaccuracies we use an inferential technique that correlates strain to extension at low
strain rates and show that this can be extended to measure strain at higher strain rates
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Mechanical
Plastics
Rate Dependency
Aerospace and Defense
Automotive
Consumer Products
Material Supplier
Toys/Sporting Goods
Packaging
Home Appliances
High Speed Testing
Nonlinear Material Models
Structural Analysis
LS-DYNA
Abaqus
ANSYS
MSC.DYTRAN
PAM-CRASH
Research Papers
July 15, 2003 | by DatapointLabs | views 4686
Assurance of quality in raw materials, control over production, and a basic understanding of criteria for performance all require a sure and complete
knowledge of analytical methods for plastics. The present volume organizes the vast world of plastics analysis into a relatively compact form. A plastics engineer will find familiar territory in such subjects as
rheometry, differential scanning calorimetry, and measurement of thermal properties. Polymer physicists and chemists will be at home with spectroscopic analyses, liquid chromatography, and nuclear magnetic resonance. All these topics and many more are covered in twelve chapters written by an impressive array of experts drawn from industry and academia.
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Rheology
Thermal
Plastics
Structural Analysis
Book Review
April 23, 2003 | by DatapointLabs | views 4432
This book covers some of the most significant techniques used in modern analytical technology to characterize plastic and composite materials.
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Plastics
Rubbers
Foams
Composites
November 09, 2002 | by DatapointLabs | views 4231
There has been a long standing need for a book that describes the
process of injection molding using the insights developed from twenty years of computer aided engineering (CAE). The authors, all veterans of injection molding CAE, have filled this need with their book. "Successful
Injection Molding" is a lot more than a book about injection molding CAE. It is clear at this stage that CAE is a tool, which, if well handled, can provide excellent results. That being said, a successful implementer of CAE for injection molding must have a range of insights into the diverse
idiosyncrasies of this enormously complex manufacturing process. The book is successful in clearly addressing these issues.
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Injection Molding
Book Review
March 13, 2001 | by DatapointLabs | views 4779
Hyperelastic models are used extensively in the finite element analysis of rubber and elastomers. These models need to be able to describe elastomeric behavior at large deformations and under different modes of deformation. In order to accomplish this daunting task, material models have been presented that can mathematically describe this behavior [1]. There are several in common use today, notably, the Mooney-Rivlin, Ogden and Arruda Boyce. Each of these has advantages that we will discuss in this article. Further, we will examine the applicability of a particular material model for a given modeling situation.
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Rubbers
Foams
Aerospace and Defense
Automotive
Biomedical
Nonlinear Material Models
Structural Analysis
Abaqus
ANSYS
SOLIDWORKS
MSC.MARC
NX Nastran
Research Papers
September 13, 2000 | by DatapointLabs | views 4441
We discuss open issues in material models for plastics and propose better means of acquiring the right material data for Moldflow simulations using current testing technologies.
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Plastics
Material Supplier
Mold Maker/Designer
Injection Molding
Moldflow
Presentations
March 16, 1999 | by DatapointLabs | views 4782
We discuss developments in viscosity modeling. New models are not generalized, but are designed to predict expected trends for polymers and incorporate both Newtonian and shear-thinning behavior.
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Plastics
Material Supplier
Mold Maker/Designer
Injection Molding
Moldflow
Presentations
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