D17
Interoperability

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13:05
conference time (CEST, Berlin)
ITEA VMAP Project and the VMAP Standards Community
28/10/2021 13:05 conference time (CEST, Berlin)
Room: D
e.V. K. Wolf (Fraunhofer SCAI, DEU)
e.V. K. Wolf (Fraunhofer SCAI, DEU)
With the progress in CAE simulation leading to more complicated and integrated workflows, data control and transfer becomes essential. This is extremely important in the manufacturing industry where complicated simulation workflows are necessary in tracking material changes throughout the manufacturing process. The VMAP data standard is the first to address this issue and solves the problem by standardizing the data being transferred to enable complete software interoperability. Additionally, VMAP provides a library of IO routines to help engineers speed-up the creation of their workflows thereby removing the emphasis for considering data formats. This enables easier and more flexible data transfer, use of different softwares for different simulations and the creation of re-useable processes that can easily be adapted to include more or different data. Moreover, this enables software interoperability for post-processing and data manipulation and processing. VMAP is cost-free and is supported by the international VMAP Standards Community made up of independent software vendors (ISVs), developers, academia and other entities and provides the CAE industry with a focus group to provide guidance, collaborate, evolve and maintain VMAP. The VMAP Standard has been verified by many industrial use cases. Some examples include: • The blow moulding use case (4 simulation stages, 4 softwares) shows the detailed prediction of shrinkage and warpage of plastic bottles and containers. This case is representative for many blow moulded components as the material interfaces can easily be expanded. • The lightweight vehicle composites use case (4 simulation stages, 5 softwares) shows an application of the continuous virtual process chain to a practice-oriented automotive structural part. An automated and accelerated workflow for product verification as well as process and product design is available. • The 4 plastic moulding use cases (2 to 4 simulation stages, 3 to 6 softwares) show the engineering potential of low-cost available materials for lightweight and safety applications. • The additive manufacturing use case (4 simulation stages, 4 softwares) for plastic components and parts demonstrate the needs and capabilities for AM in plastics. • The consumer lifestyle use case explores the complex improvement of its production processes and the performance of its shaver products. • The aerospace composites use case (5 simulation stages, 6 softwares) shows how standardized information can be passed between all the relevant simulation modules for the different phases of a product development program. VMAP Standards Community e.V., a non-profit registered association in Germany, works on further standardization in domains which are beyond simulation for manufacturing parts, guaranteeing these benefits in both the short and long term. The purpose of VMAP SC is dissemination of the VMAP Standard and its further development, and the assurance and maintenance of a uniform library. The VMAP SC is open to any interested party that wants to use or contribute to the standardization efforts of the VMAP SC. The founding members of the VMAP SC e.V. includes industries, ISVs, developers, academia and other entities committed to evolve VMAP into a truly international Standard. All VMAP Standards Community information can be found on the website vmap.eu.com
interoperability, standardization, associations, manufacturing simulation, software interfaces, data mapping, material models, simulation workflows
13:25
conference time (CEST, Berlin)
VMAP Enabling Interoperability in Integrated CAE Simulation Workflows
28/10/2021 13:25 conference time (CEST, Berlin)
Room: D
P. Gulati (Fraunhofer SCAI, DEU)
P. Gulati (Fraunhofer SCAI, DEU)
VMAP is a vendor-neutral standard for CAE data storage to enhance interoperability in virtual engineering workflows. Some of the features of VMAP include: • Meta and user data • Geometry and discretization • Coordinate and unit systems • Result and state variables • Parameters for (material) models • Based on HDF5 (High-performance data management and storage suite) • Software library available to read/write VMAP data files • Tutorials and test cases VMAP provides a library of IO routines to help engineers speed-up the creation of their workflows thereby removing the emphasis for considering data formats. It enables easier and more flexible data transfer, use of different software for different simulations and the creation of re-useable processes that can be easily adapted to include more or different data. It enables software interoperability for pre- & post-processing and data manipulation. The VMAP Standard Specifications aim to provide best-practice guidelines for the community. These specifications form the core of the standard. Since, VMAP is driven by industry and software vendors, the main focus of VMAP has been to align the CAE data in a form which is generic and at the same time encompasses all aspects of it. During the project, we have aligned the data into groups and found commonalities across multiple software to build the standard. Keeping this in mind, the VMAP storage structure defines the four main groups which form the essence of any simulation – GEOMETRY, VARIABLES, SYSTEM and MATERIAL. Within these four main groups, the CAE data is sorted into datasets and attributes. The VMAP standard is based on HDF5 a widely accepted implementation platform for many IO related applications. The freely available SWIG wrapper tool can be utilised to bind the VMAP IO software library into software written in any other programming or script language, see Figure 1. As such the VMAP IO library is universally available. Many ISVs, both large and small players, have already implemented the VMAP Standard directly within their software to extract the maximum speed and efficiency. With the implementation a series of simple test cases are supplied within the release pack so that implementations can be quickly verified. In summary a complete VMAP Package release includes: • defined VMAP Standard (document), • use case descriptions and background information (document), • IO software library (software), • a set of test cases to verify any implementation (files), • contact information for the VMAP Standards Community (document). To date the VMAP Standard has been implemented in many Commercial Off the Shelf (COTS) software. All information about the VMAP Standard can be found on the website vmap.eu.com.
interoperability, standards, manufacturing simulation, software interfaces, data mapping, material models, simulation workflows
13:45
conference time (CEST, Berlin)
An Integrative Optimization Concept for Extrusion Blow Molded Parts
28/10/2021 13:45 conference time (CEST, Berlin)
Room: D
O. Bruch, D. Grommes (Dr. Reinold Hagen Stiftung - Consultancy, DEU); P. Michels (Hochschule Bonn-Rhein-Sieg, DEU)
O. Bruch, D. Grommes (Dr. Reinold Hagen Stiftung - Consultancy, DEU); P. Michels (Hochschule Bonn-Rhein-Sieg, DEU)
The extrusion blow molding process is the standard manufacturing method for hollow plastic parts such as bottles, cans and large containers. The process consists of two main steps. In a first step a hollow tube which is called parison is extruded. This parison is then in a second step captured by a mold and inflated until it meets the walls of the cooled mold. After a certain cooling time the final part can be demolded. The use of virtual methods not only reduces development costs and time but also the need for prototypes and physical tests. The standard CAE workflow for extrusion blow molded parts involves the process simulation of the parison inflation followed by the simulation of different product tests like drop test, internal pressure test or top-load test. More recent research activities are dealing with the consideration of the process history in the virtual product tests and the prediction of temperature induced shrinkage and warpage. In this work, a comprehensive integrative optimisation workflow for extrusion blow molded components is presented. In contrast to other manufacturing processes, such as injection molding, the mechanical properties of blow molded components are significantly influenced not only by the design of the article, but also by the distribution of wall thicknesses resulting from the manufacturing process. For safety reasons, components are often oversized, i.e. more material is used than necessary. Directly linked to the weight of the article is the cycle time, which significantly determines the energy consumption in production. In order to achieve the desired mechanical properties with the least possible use of material, wall thicknesses and design must therefore be treated simultaneously in an coupled optimization strategy. Because different software tools are used for parison creation, process simulation and structural analysis the transfer of simulation data is not straightforward. Therefore, the vendor-neutral VMAP interface standard which was developed during ITEA3 research project VMAP (A new Interface Standard for Integrated Virtual Material Modelling in Manufacturing Industry) is used for data exchange between the different utilized CAE software tools.
VMAP, optimization, extrusion blow molding, testing
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