October 04, 2016 | by DatapointLabs | views 4887
Finite element analysis of plastics contains assumptions and uncertainties that can affect simulation accuracy. It is useful to quantify these effects prior to using simulation for real-life applications. A mid-stage validation uses a controlled physical test on a standardized part to compare results from simulation to physical experiment. These validations do not use real-life parts but carefully designed geometries that probe the accuracy of the simulation; the geometries themselves can be tested with boundary conditions that can be simulated correctly. In one study, a quasi-static three-point bending experiment of a standardized parallel ribbed plate is performed and simulated, using Abaqus. A comparison of the strain fields resulting from the complex stress state on the face of the ribs obtained by digital image correlation (DIC) vs. simulation is used to quantify the simulation's fidelity. In a second study, a dynamic dart impact experiment is validated using LS-Dyna probing the multi-axial deformation of a polypropylene until failure.
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Mechanical
Plastics
Automotive
Structural Analysis
LS-DYNA
Abaqus
Presentations
Validation
March 05, 2019 | by Datapoint Newsletters | views 4879
High Humidity Testing, TestCart Online Order System, Matereality Version 12, Upcoming Events
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Mechanical
Plastics
Newsletters
Matereality
Materials Information Management
April 29, 2015 | by Datapoint Newsletters | views 4876
Validation is Focus of DatapointLabs Technical Presentations, New Combined Loading Compression Test for Composite Materials, Matereality Software for Your Product Development Team
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Plastics
Newsletters
March 20, 2015 | by Datapoint Newsletters | views 4864
DatapointLabs Celebrates 20 Years of Putting Materials into Product Design, Very High Strain-Rate Tensile Testing Up to 1000 /s, New Long Term Stress Relaxation Capability, Expanded Creep Testing Capacity
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Newsletters
October 28, 2014 | by DatapointLabs | views 4861
It has long been desired to quantify the accuracy of simulation results. Through developments in digital image correlation (DIC) techniques, it is now possible to quantify the deviation between simulation and real life experimentation. In this paper, three-dimension DIC measurements of deformed parts are compared to deformed surfaces predicted in simulation. Using DIC, it is possible to import deformed surface elements from simulation and map the magnitude of deviation from the measurements of the actual deformed shape.
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High Speed Testing
Nonlinear Material Models
Structural Analysis
ANSYS
Presentations
Validation
July 27, 2015 | by Paul Du Bois | views 4829
The need for accurate material models to simulate the deformation, damage and failure of polymer matrix composites is becoming critical as these materials are gaining increased usage in the aerospace and automotive industries. While there are several composite material models currently available within LS-DYNA, there are several features that have been identified that could improve the predictive capability of a composite model. To address these needs, a combined plasticity and damage model suitable for use with both solid and shell elements is being developed and is being implemented into LS-DYNA as MAT_213. A key feature of the improved material model is the use of tabulated stress-strain data in a variety of coordinate directions to fully define the stress-strain response of the material. To date, the model development efforts have been focused on creating the plasticity portion of the model. The Tsai-Wu development efforts have focused on creating the plasticity portion of the model. The Tsai-Wu composite failure model has been generalized and extended to a strain-hardening based orthotropic material model with a non-associative flow rule. The coefficients of the yield function, and the stresses to be used in both the yield function and the flow rule are computed based on the input stress-strain curves using the effective plastic strain as the tracking variable. The coefficients in the flow rule are computed based on the obtained stress-strain data. The developed material model is suitable for implementation within LS-DYNA for use in analyzing the nonlinear response of polymer composites.
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Mechanical
Plasticity
Yielding/Failure Analysis
Aerospace and Defense
Automotive
High Speed Testing
LS-DYNA
Composites
Research Papers
Validation
June 14, 2017 | by Hubert Lobo | views 4814
DatapointLabs Technical Center for Materials has a mission to strengthen the materials core of manufacturing enterprises by facilitating the use of new materials, novel manufacturing processes, and simulation-based product development. A whole-process approach is needed to address the role of materials in this context.
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Mechanical
Plastics
Rubbers
Metals
Hyperelastic
Nonlinear Material Models
Structural Analysis
ANSYS
Validation
3D Printing
Matereality
Materials Information Management
August 09, 2012 | by Datapoint Newsletters | views 4801
Inc. Magazine Features DatapointLabs. Book Release. Catalog Updates.
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Newsletters
March 13, 2019 | by DatapointLabs | views 4799
Multi-scale material models are being increasing applied for high level simulation of complex materials such as UD layups, fabric laminate composites, fiber-filled plastics. These models require data inputs from a variety of material tests which are then assembled into models used in the finite element solvers. We present an infrastructure for the digitalization of such information, where the required material data are collected including a process for maintaining traceability and consistency of the source data. Information about the compositional characteristics and processing history are captured. Built-in software modules or external client tools can be used for calibration of material models with the resulting material file linked to the source data. The accuracy of the reduced order model can be checked by running a validation simulation against a physical test. Models can be published and released into a master CAE materials library output where they can be used to model such materials for a variety of target solvers. This process improves the reliability and accuracy of composites simulation.
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Aerospace and Defense
Automotive
Structural Analysis
Composites
Presentations
Materials Information Management
August 25, 2008 | by Datapoint Newsletters | views 4793
New 100kN Instron. New TestPaks Alliance Partner. Expanded Viso-Elastic Testing Capability. New at TestPaks.com.
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Mechanical
Viscoelastic
SOLIDWORKS
ANSYS FIDAP
POLYFLOW Extrusion
Newsletters
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