2019
Krieglsteiner, Joscha; Horst, Peter; Schmidt, Carsten
In: Aircraft Engineering and Aerospace Technology , Bd. 91, Nr. 4, S. 607-619, 2019.
Abstract | Links | BibTeX | Schlagwörter: Composite Structures, Design Method, Preliminary design
@article{Krieglsteiner2019b,
title = {Definition and Representation of Stiffened Shell Structures in the Context of an Integrated Development Process},
author = {Joscha Krieglsteiner and Peter Horst and Carsten Schmidt},
url = {https://doi.org/10.1108/AEAT-07-2018-0205},
doi = {10.1108/AEAT-07-2018-0205},
year = {2019},
date = {2019-03-28},
journal = {Aircraft Engineering and Aerospace Technology },
volume = {91},
number = {4},
pages = {607-619},
abstract = {Purpose A novel development process aims at finding solutions for lightweight stiffened shell structures and their efficient production. To respect the strong interdependency of structural design and production planning, particularly observed for composite structures, it is of high interest to start considering production effects in early development phases. This integrated approach requires an integrated representation of structure and production. The purpose of this study is to investigate the scope of relevant data and to find a structure for its representation. Design/methodology/approach The development task is analyzed and a system of so-called solution dimensions is presented, which covers all important aspects of stiffened shell structures and their production. An integrated product data model is developed to cover all of the solution dimensions. Findings The product data model consists of five coherent partial models. It is explained how these models are defined and how they are connected to each other. An academic example of an aircraft fuselage panel is used to demonstrate the definition process. It is shown how even complex structural concepts are defined systematically. Practical implications It is explained how this integrated product data model is used in a software project for the development of aircraft fuselage structures. Originality/value The presented approach for the definition and representation of stiffened shell structures enables the developer, e.g. of aircraft fuselage, to respect the crucial criterion of manufacturability from early development phases on. Further, new design approaches, e.g. as inspired by topology optimization, can be considered.},
keywords = {Composite Structures, Design Method, Preliminary design},
pubstate = {published},
tppubtype = {article}
}
Krieglsteiner, Joscha; Horst, Peter; Schmidt, Carsten
An Integrated Development Process for Stiffened Shell Lightweight Structures Artikel
In: Proceedings of ICoRD, Bd. 1, S. 834-844, 2019.
Links | BibTeX | Schlagwörter: Design Method, Preliminary design
@article{Krieglsteiner2019,
title = {An Integrated Development Process for Stiffened Shell Lightweight Structures},
author = {Joscha Krieglsteiner and Peter Horst and Carsten Schmidt},
doi = {10.1007/978-981-13-5974-3_72},
year = {2019},
date = {2019-01-15},
journal = {Proceedings of ICoRD},
volume = {1},
pages = {834-844},
keywords = {Design Method, Preliminary design},
pubstate = {published},
tppubtype = {article}
}
2016
Behr, Matthias; Schmidt, Carsten
Systematic Production Planning Method for CFRP Structures Artikel
In: Advanced Materials Research, Bd. Vol. 1140, S. S. 328-334, 2016.
Abstract | BibTeX | Schlagwörter: Composite Structures, Preliminary design, Production Planning
@article{Behr2016,
title = {Systematic Production Planning Method for CFRP Structures},
author = {Matthias Behr and Carsten Schmidt},
year = {2016},
date = {2016-08-25},
booktitle = {Proceedings of 2016 WGP Congress},
journal = {Advanced Materials Research},
volume = {Vol. 1140},
pages = {S. 328-334},
abstract = {A production planning method is presented which allows to systematically build process chains based on a preliminary design of a composite structure. The method uses the specific sequences of procedural steps that occur in the production of carbon fibre reinforced plastic (CFRP) structures, to build sub process chains for each sub component of the structure. Process restrictions are considered to evaluate the suitability of different production processes. To obtain the whole process chain of the structure, different joining methods are applied in addition to combine the sub components and it sub chains. The results of the presented method are used in a superior development procedure to investigate resulting impacts on the solution. Possible impacts could be the production costs or the material characteristics.},
keywords = {Composite Structures, Preliminary design, Production Planning},
pubstate = {published},
tppubtype = {article}
}
Denkena, Berend; Schmidt, Carsten; Behr, Matthias
Systematische Erstellung von Prozessketten in frühen Phasen der Produktentwicklung von CFK-Strukturen Konferenz
WGP Kongress 2016, 2016.
BibTeX | Schlagwörter: Composite Structures, Preliminary design, Production Planning
@conference{Denkena2016b,
title = {Systematische Erstellung von Prozessketten in frühen Phasen der Produktentwicklung von CFK-Strukturen},
author = {Berend Denkena and Carsten Schmidt and Matthias Behr},
year = {2016},
date = {2016-08-25},
booktitle = {WGP Kongress 2016},
keywords = {Composite Structures, Preliminary design, Production Planning},
pubstate = {published},
tppubtype = {conference}
}
2014
Kriglsteiner, Joscha; Horst, Peter; Schmidt, Carsten
Optimization of fiber-reinforced stiffener profiles for aircraft fuselage preliminary structural design Konferenzbeitrag
In: 16th European Conference on Composite Materials, Seville, 2014.
Abstract | BibTeX | Schlagwörter: Composite Structures, Fuselage, Preliminary design, Stiffener Profiles
@inproceedings{Kriglsteiner2014,
title = {Optimization of fiber-reinforced stiffener profiles for aircraft fuselage preliminary structural design},
author = {Joscha Kriglsteiner and Peter Horst and Carsten Schmidt},
year = {2014},
date = {2014-06-22},
booktitle = {16th European Conference on Composite Materials},
address = {Seville},
abstract = {This paper presents a characterization module for stiffener profiles. It is part of a modellig and analysis tool for stiffened structures in aircraft fuselage design. The module offers options to determine mechanical characteristics of a given section such as mass, stiffness, and failure loads for strength and local stability. For the characterization, analytical approaches and the Finite Element Method (FEM) are used. Both ways are presented and the results are compared as part of the verification of the module. Furthermore, how the module can be used for a basic comparison of design concepts is described.},
keywords = {Composite Structures, Fuselage, Preliminary design, Stiffener Profiles},
pubstate = {published},
tppubtype = {inproceedings}
}
2013
Denkena, Berend; Horst, Peter; Schmidt, Carsten; Behr, Matthias; Krieglsteiner, Joscha
Efficient production of CFRP lightweight structures on the basis of manufacturing considerations at an early design stage Konferenzbeitrag
In: Machining Innovation Conference , Hannover, 2013.
Abstract | BibTeX | Schlagwörter: Aerospace, Composite Structures, Fuselage, Preliminary design
@inproceedings{Denkena2013,
title = {Efficient production of CFRP lightweight structures on the basis of manufacturing considerations at an early design stage},
author = {Berend Denkena and Peter Horst and Carsten Schmidt and Matthias Behr and Joscha Krieglsteiner},
year = {2013},
date = {2013-09-18},
booktitle = {Machining Innovation Conference },
address = {Hannover},
abstract = {Success in development of lightweight structures is determined by the three disciplines of design, materials, and manufacturing. Focusing on design leads to expensive lightweight structures while overrating production makes it hard to reach structural performance goals. The global optimum of structural performance and cost can only be reached if all three disciplines are equally taken into account. It can be observed that this optimum gets increasingly important for major strategic decisions in lightweight construction industry, e.g. the material concept in future aircraft structures: carbon fiber-reinforced plastics (CFRP) vs. aluminum.
While development of metallic structures is industrially performed and broadly researched, fiber-reinforced plastics do present new challenges. Design work with homogeneous and isotropic metallic structures is mainly done on a level of part shape and sizing. For composites, the inner heterogeneous and orthotropic structure has to be engineered as well. Therefore, structure development usually has to deal with a higher number of design parameters, raising the need for simulation tools and optimization algorithms. In addition to more sophisticated design procedures, production planning for composite structures gets more challenging as well. For metallic structures, manufacturing usually starts with semi-finished parts having material properties mostly set as in the final product. The material properties of composites are mainly determined by the manufacturing processes. Properties such as fiber volume fraction or fiber orientation and imperfections like fiber undulations or inclusions are highly dependent on manufacturing. Therefore process stability has a large impact on structural characteristics. Design mostly accounts for the resulting uncertainties with high knock-down factors for assumed material properties, i.e. decreased lightweight potential.},
keywords = {Aerospace, Composite Structures, Fuselage, Preliminary design},
pubstate = {published},
tppubtype = {inproceedings}
}
While development of metallic structures is industrially performed and broadly researched, fiber-reinforced plastics do present new challenges. Design work with homogeneous and isotropic metallic structures is mainly done on a level of part shape and sizing. For composites, the inner heterogeneous and orthotropic structure has to be engineered as well. Therefore, structure development usually has to deal with a higher number of design parameters, raising the need for simulation tools and optimization algorithms. In addition to more sophisticated design procedures, production planning for composite structures gets more challenging as well. For metallic structures, manufacturing usually starts with semi-finished parts having material properties mostly set as in the final product. The material properties of composites are mainly determined by the manufacturing processes. Properties such as fiber volume fraction or fiber orientation and imperfections like fiber undulations or inclusions are highly dependent on manufacturing. Therefore process stability has a large impact on structural characteristics. Design mostly accounts for the resulting uncertainties with high knock-down factors for assumed material properties, i.e. decreased lightweight potential.