11 results
Filters
Settings
Now showing1 - 10 of 11
- Some of the metrics are blocked by yourconsent settings
Item type:Research Data, Access status: with files , Module Interface Graph (MIG) for a product family of Robotic Vacuum Cleaners before and after Design for Variety (DfV)This research dataset provides a Module Interface Graph (MIG) of a robotic vacuum cleaner product family consisting of three different product variants in two design states: before and after Design for Variety (DfV). The graphical model describes the product architecture at component and interface level. The MIG is a visual modeling tool used within the Integrated PKT Approach for Developing Modular Product Families. It combines a spatial representation of the product with information about its components, interfaces, connections and flows. By integrating the architectures of multiple product variants into a common representation, the MIG makes commonalities, differences, and dependencies within a product family visible. It thereby supports the analysis of product variety and the identification of suitable module boundaries and standardized interfaces. Using the notation documented in the included legend, the MIG distinguishes between standard (white), variant (grey) and optional (dotted line) components as well as interfaces. In this dataset, different line colors represent structural, electrical, information, mechanical power, dirt, pneumatic, and hydraulic flows. Line thickness, line type, and line endings provide additional information about components and interfaces, optional elements, fixed connections, and directed flows. The comparison of the two design states illustrates how DfV affects the product architecture. The dataset is used as an example in research and teaching on modular product families, product architecture, modularization and variant management. The data are provided as a two-page PDF.Data Type: Still Image39 28 - Some of the metrics are blocked by yourconsent settings
Item type:Research Data, Access status: with files , Experimental results from multiaxial buckling tests on cylindrical CFRP shells with R/t-ratio of 147(2025-06-03); ; Buckling failure of cylindrical CFRP shells in combined load cases is only considered in few experimental studies, despite occurring frequently in both aerospace and civil applications. Hence, validation and verification of numerical models for these scenarios can be challenging. In this publication the thoroughly documented results of a large number of buckling tests with CFRP shells in multiaxial loading are provided, to support the validation of FE models and possibly enable the development of new design approaches. Extensive experimental campaigns on the buckling of small-scale cylindrical CFRP shells in multiaxial load cases were carried out on a set of nominally identical cylindrical CFRP shells. These shells were manufactured at the Institute of Composite Structures and Adaptive Systems of DLR in Braunschweig and have been tested in a previous campaign in pure axial compression. In this study, various combined load cases comprised of axial compression and bending, axial compression and torsion, as well as combinations of all three buckling inducing load types were investigated. This publication contains a separate sheet for each considered shell, listing for all individual tests the achieved buckling loads and the loading imperfections determined from measurement data as well as the mean values and standard deviation calculated per test point.Data Type: Experimental Data72 53 - Some of the metrics are blocked by yourconsent settings
Item type:Research Data, Access status: with files , A design catalogue supporting the selection of design approaches for axial loaded cylindrical thin-walled CFRP shells(2025-01-20)This catalogue was developed as part of Tobias Hartwich's dissertation at the TUHH. The dissertation concerns the support of the design of thin-walled cylindrical CFRP shells under axial compressive load. This interactive catalogue was drawn up to enable better selection of a design approaches for axial loaded thin-walled cylindircal CFRP shells. The assessment of the individual designs is based on the shells available in the literature since 2000 and the shells tested as part of the thesis and in [Har23] and [Har24], in particular. The catalogue is intentionally structured in such a way that it can be expanded to include further approaches. Individual design approaches can also be assessed again if new cylinder data is available on which an assessment can be conducted.Data Type: Technical Documentation56 34 - Some of the metrics are blocked by yourconsent settings
Item type:Research Data, Access status: with files , Experimental results from multiaxial buckling tests on cylindrical CFRP shells with R/t-ratio of 375(2025-01-08); ; The buckling failure of cylindrical CFRP shells in combined load cases is only considered in very few experimental studies, despite combined loading occurring frequently in both aerospace and civil applications. Hence, validation and verification of numerical models for these scenarios is challenging. In order to support the validation of FE models and possibly enable the development of new design approaches, the thoroughly documented results of a large number of buckling tests with CFRP shells in multiaxial loading are provided herein. The extensive experimental campaigns on the buckling of cylindrical CFRP shells in multiaxial load cases were conducted on a set of nominally identical specimens. These shells were manufactured at the Institute of Composite Structures and Adaptive Systems of DLR in Braunschweig and have been tested in a previous campaign in pure axial compression. In this study, various combined load cases comprised of axial compression and bending, axial compression and torsion, as well as combinations of all three buckling inducing load types were investigated. This publication contains a separate sheet for each considered shell, listing for all individual tests the achieved buckling loads and the loading imperfections determined from measurement data as well as the mean values and standard deviation of these data for each test point.Data Type: Experimental Data76 49 - Some of the metrics are blocked by yourconsent settings
Item type:Research Data, Access status: with files , Frequency response fuctions of variant GFRP sandwich panel in thermal environment(2024-11-04); The study focuses on examining the influence of temperature on the eigenfrequencies and amplifications of four different GFRP sandwich panels with aramid honeycomb cores. The temperature range considered is -40°C to 120°C, relevant to aerospace applications. The tests demonstrated that temperature variations have a substantial impact on the eigenfrequencies of the panels, particularly showing significant frequency shifts at temperatures below 0°C. This finding contradicts the initial assumptions. Furthermore, the study revealed that amplifications do not consistently peak at room temperature as commonly assumed in aviation certification standards. Instead, the maximum amplification values occur at different temperature ranges, reflecting the unique properties of each panel.Data Type: Measurement and Test Data43 19 - Some of the metrics are blocked by yourconsent settings
Item type:Research Data, Access status: with files , Cost Application for the Publication: Methodology for Cost Estimation Using Characteristic Factors in Additive Manufacturing(2024-08-27); ; ; ; A cost tool was created from the mathematical equations and relationships, which determines the costs for the additive manufacturing processes depending on the number and dimensions of the component. Furthermore, weight reductions are specified in percent for known conventional costs that are required to achieve cost parity to the conventional manufacturing method. Therfore, this application allow an easy and fast estimation of suitable additive manufacturing technologies denpending on the selected material, dimension and quantity of a component. With the knowledge of the manufacturing restriction of the each technology this tool deliver a great estimation in finding the right application. It is also possible to adjust the costs and add different machines to this tool, which enables the comparison between technologies.Data Type: Research Software108 36 - Some of the metrics are blocked by yourconsent settings
Item type:Research Data, Access status: with files , Geometric Imperfection Data of 7 thin-walled cylindrical shells with R/t-Ratio of 375(2024-05-30); ; The seven cylindrical shells were manufactured at the Institute of Composite Structures and Adaptive Systems of DLR in Braunschweig. .The measurement of the surface in order to determine the geometric imperfections was also carried out there utilising an ATOS system from GOM. The given geometric imperfection data is provided on the twelve excel-sheets in the form of Fourier coefficients of a double Fourier series in phase shift representation. The circumferential mode is described by full waves, the axial modes by a half-wave representation. In order to be able to map imperfections in the boundary zones of the shells, the cosine approach is taken.Data Type: Measurement and Test Data93 49 - Some of the metrics are blocked by yourconsent settings
Item type:Research Data, Access status: with files , Geometric Imperfection Data of 12 thin-walled cylindrical shells with R/t-Ratio of 147(2024-02-29); ; The twelve cylindrical shells were manufactured at the Institute of Composite Structures and Adaptive Systems of DLR in Braunschweig. The measurement of the surface in order to determine the geometric imperfections was also carried out there utilising an ATOS system from GOM. The given geometric imperfection data is provided on the twelve excel-sheets in the form of Fourier coefficients of a double Fourier series in phase shift representation. The circumferential mode is described by full waves, the axial modes by a half-wave representation. In order to be able to map imperfections in the boundary zones of the shells, the cosine approach is taken.Data Type: Measurement and Test Data80 46 - Some of the metrics are blocked by yourconsent settings
Item type:Research Data, Access status: with files , Publications and Review used for a Simplified Structured Literature Study (dataset for ICED 2023 Publication: MBSE within the engineering design community - an exploratory study)This dataset includes the lists of publications and the review-parameters used for a literature study regarding the usage and terminology of MBSE within the engineering design community. It includes 93 publications gathered from the Design Society library (57 papers) and the proceedings of the CIRP Design conferences (36 papers). These conferences are assumed to give a comprehensive insight into of the engineering design community and are, thus, representative of the current research and focus of the conducted review. The publications were identified based on the term Model-based Systems Engineering, similar spellings or their abbreviation (MBSE) that are used in the title, abstract, or keywords. The search covers the period from 2007 when the first version of SysML was published by the OMG until today. However, the first publications found only date back to 2011. The Publications and Review used in Simplified Structured Literature Study. The work is/will be published at the 2023 International Conference on Engineering Design. For the context of the study as well as the results of the literature study, please see the publication.Data Type: Dataset105 332 - Some of the metrics are blocked by yourconsent settings
Item type:Research Data, Access status: with files , 4 Step Creation Method(2021-12-14); The 4 Step Creation Method is a method for systematic new development. It promotes creativity in interdisciplinary teams and provides a framework for cooperation so that original innovations can emerge. At the same time, the method can be used for the continuous improvement of existing systems.Data Type: Interactive Resource666 350