Leichtbau als Treiber von Innovationen

Friedrich, Horst E.; Krishnamoorthy, Sivakumara K.

doi:10.1007/978-3-658-12295-9_1

Cited by 15 publications

(13 citation statements)

References 4 publications

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“…Continuous fiber reinforced thermoplastics (cFRTP) play a key role here, due to their excellent density-specific stiffness and strength properties, as well as their high specific energy absorption capacity. Further interesting advantages such as short cycle times, recyclability, and welding capability make them suitable for the large-scale production of safety-relevant structural components [1][2][3][4]. The virtual prediction of their mechanical behavior in the finite element analysis (FEA) is an efficient way of developing structural parts.…”

Section: Introductionmentioning

confidence: 99%

Optimization of a Tapered Specimen Geometry for Short-Term Dynamic Tensile Testing of Continuous Fiber Reinforced Thermoplastics

Mischo,

Schmeer

2024

J. Compos. Sci.

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Continuous fiber reinforced thermoplastics (cFRTP) are one of the most promising lightweight materials. For their use in structural components, reproducible and comparable material values have to be evaluated, especially at high strain rates. Due to their high stiffness and outstanding strength properties, the evaluation of the material behavior at high strain rates is complex. In the presented work, a new tensile specimen geometry for strain rate testing is virtually optimized using a metamodel approach with an artificial neural network. The final specimen design is experimentally validated and compared with rectangular specimen results for a carbon fiber reinforced polycarbonate (CF-PC). The optimized specimen geometry leads to 100% valid test results in experimental validation of cross-ply laminates and reaches 9% higher tensile strength values than the rectangle geometry with applied end tabs at a strain rate of 40 s−1. Through the optimization, comparable material parameters can be efficiently generated for a successful cFRTP strain rate characterization.

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Section: Introductionmentioning

confidence: 99%

Optimization of a Tapered Specimen Geometry for Short-Term Dynamic Tensile Testing of Continuous Fiber Reinforced Thermoplastics

Mischo,

Schmeer

2024

J. Compos. Sci.

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“…However, when different materials are joined, thermal joining processes reach their limits. 5 Such mixed construction joints can be joined using mechanical joining processes. Self-piercing riveting (SPR) has become established as a joining process for joining aluminum and steel.…”

Section: Introductionmentioning

confidence: 99%

Development of a numerical simulation model for self-piercing riveting of additive manufactured AlSi10Mg

Heyser

Petker

Meschut

2023

Proceedings of the Institution of Mechanical Engineers, Part L:

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Laser additive manufacturing processes are used for the production of highly complex geometric structures due to their high geometric freedom. Additive manufacturing processes, in particular powder-based selective laser melting, are used to produce metallic additive manufactured components for the automotive and aerospace industries. Different materials are often joined together to realize sustainable lightweight construction. The production of such mixed construction joints is often realized using mechanical joining technology (e.g. self-piercing riveting). However, there is currently very little experience with the mechanical joining of metallic additive manufacturing components. Furthermore, there is insufficient knowledge about the effects that occur during the mechanical joining of additive manufacturing components. In this article, a method is presented to investigate the joinability of additively manufactured components with conventionally manufactured components using a numerical simulation of the self-piercing riveting process. For this purpose, the additive manufacturing materials are characterized experimentally, the simulation model is configured, and the joining process with additive manufacturing materials is represented in the numerical simulation. Furthermore, the influence of the building direction on the mechanical properties is shown using miniature tensile specimens. Besides the configuration of the simulation model, the influence of heat treatment on the self-piercing riveting process is presented.

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“…Kohl et al [ 7 ] presented the environmental impact of urea-formaldehyde bonded beech plywood. Commonly, manufactured structural components in this field are made from steel, aluminum, magnesium, polymers or polymer composites by means of pressing, deep drawing, casting and molding [ 12 ]. Due to their low resistance against various media—e.g., salts—metals are usually coated using synthetic coating systems [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

Interfacial Adhesion and Mechanical Properties of Wood-Polymer Hybrid Composites Prepared by Injection Molding

et al. 2021

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Birch (Betula pendula Roth.) and beech (Fagus sylvatica L.) solid wood and plywood were overmolded with polyamide 6 (PA 6) and polypropylene (PP) to investigate their mechanical properties and interfacial adhesion. In the case of PA 6, maximum tensile shear strengths values of more than 8 to 9 MPa were obtained for birch and beech, respectively. The values are comparable to bond strengths of commercial joints bonded with formaldehyde-containing amino-plastics. Perpendicular to the wood elements, bond strength values of 3 MPa was achieved for PA 6. The penetration of the polymers into the wood structure results in a non-densified interphase and subsequent plastic deformation of the wood structure beyond the interphase. These compressed areas influenced the interfacial adhesion and mechanical interlocking. SEM and XPS analysis revealed different interpenetration behavior of the polymers into the wood structure, with chemical interaction confirmed only for wood and PA 6 but not PP.

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Leichtbau als Treiber von Innovationen

Cited by 15 publications

References 4 publications

Optimization of a Tapered Specimen Geometry for Short-Term Dynamic Tensile Testing of Continuous Fiber Reinforced Thermoplastics

Optimization of a Tapered Specimen Geometry for Short-Term Dynamic Tensile Testing of Continuous Fiber Reinforced Thermoplastics

Development of a numerical simulation model for self-piercing riveting of additive manufactured AlSi10Mg

Interfacial Adhesion and Mechanical Properties of Wood-Polymer Hybrid Composites Prepared by Injection Molding

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