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Dissertation
Optimierung des Risikomanagements als Beitrag zur Steigerung des Projekterfolgs bei Produktentwicklungsprojekten am Beispiel der Automobilindustrie
(2024)
Die zunehmende Projektifizierung der letzten Jahrzehnte hat dazu geführt, dass der Beitrag von Projekten zur Erreichung der Unternehmensziele und damit zur unternehmerischen Wert-schöpfung in gleichem Maße gestiegen ist. Gleichzeitig sind Projekte aufgrund ihres einzigar-tigen Charakters mit Risiken und Unsicherheiten behaftet, deren Auftreten im Kontext der Produktentwicklung in der Automobilindustrie durch den Produktivitätsdruck sowie die stetig steigende Komplexität und Dynamik noch verstärkt wird. Die negativen ...
Aufsatz
High Consistency Silicone Rubber Foams
(2024-04-23)
Silicone elastomers are high-performance plastics. In the extrusion process, only high-consistency silicone rubbers were used. In order to reduce the cost and weight, silicone rubbers can be foamed during processing. In this study, high-consistency silicone rubber is processed with different physical and chemical blowing agents. The resulting reaction kinetics, as well as the mechanical and morphological properties, had been investigated and compared with each other. This showed that the chemical blowing agent ...
Aufsatz
Pathways toward the Use of Non-Destructive Micromagnetic Analysis for Porosity Assessment and Process Parameter Optimization in Additive Manufacturing of 42CrMo4 (AISI 4140)
(2024-02-20)
Laser-based powder bed fusion of metals (PBF-LB/M) is a widely applied additive manufacturing technique. Thus, PBF-LB/M represents a potential candidate for the processing of quenched and tempered (Q&T) steels such as 42CrMo4 (AISI 4140), as these steels are often considered as the material of choice for complex components, e.g., in the toolmaking industry. However, due to the presence of process-induced defects, achieving a high quality of the resulting parts remains challenging in PBF-LB/M. Therefore, an extensive ...
Aufsatz
Modification of self-reinforced composites (SRCs) via film stacking process
(2022-02-25)
This work presents the mechanical behavior of self-reinforced composites (SRCs) manufactured and modified via film stacking. For modification, interleaved films made of polypropylene (PP), a thermoplastic elastomer and a polyolefin engage were combined in different ways to induce the elastic modifier into the matrix material. The content of modifier was also varied in two ways. First, the films were produced out of a single material and second out of a compound. So, the same content of modifier was implemented in two ...
Aufsatz
Investigation of the adhesive strength in a combined compaction and back-injection process to produce back-injected self-reinforced composites (SRCs)
(2022-03-08)
This publication investigates the adhesion between an injection molded component and a self-reinforced composite (SRC) produced in a combined compaction and back-injection process to produce back-injected self-reinforced composites. To study the influence of the process, the parameters barrel temperature, time of injection, and tool temperature were varied. In addition, samples were taken at different positions along the flow path. In light of the orthotropic material behavior of SRCs, investigations were conducted ...
Aufsatz
Textile Waste Becomes Plastic Composites
(2023-09)
Every year, large quantities of textiles end up in landfills or in thermal recycling. However, some of this waste could also serve as raw materials for composite materials. Left-over cotton fibers of the textile industry, for example, are suitable as reinforcing fibers that enhance the mechanical properties of bio-based plastics. By using such waste streams, materials can be reinforced in a cost-effective and bio-based way in the future.
Aufsatz
Holzdesign trifft Kunststofftechnik
(2022)
Werkstoffverbunde aus Holzgeweben in einer thermoplastischen Matrix verbinden die Idee des textilen Holzbaus mit der Faserverbundtechnologie. In einem Projekt werden Fassadenelemente aus solchen Wood Textile Composites hergestellt. Dabei spielt neben den mechanischen Anforderungen auch die gestalterische Seite und die Akzeptanz der zukünftigen Nutzer eine wichtige Rolle.
Dissertation
Biases im Planungsprozess
(2023)
Die vorliegende Arbeit befasst sich mit der Frage nach der Relevanz und der Diagnostizierbarkeit kognitiver, motivationaler und gruppendynamischer Biases im Kontext organisationaler Planungsprozesse. Ziel der Arbeit war es, einen Fragebogen zu entwickeln, der die Anfälligkeit von Gruppen für derartige Biases erfasst und damit einen Indikator für die Qualität von Planungsprozessen darstellt.
Bezüglich des Problems der Diagnostizierbarkeit impliziter Biases zeigt sich in der Literatur, dass die Organisationskultur die ...