André Leonhardt
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View article: Improvement of press hardening process with cushion ram pulsation of stainless steel sheet on servo-screw press
Improvement of press hardening process with cushion ram pulsation of stainless steel sheet on servo-screw press Open
The Application of stainless steel for electric vehicle (EV) battery housings not only improves the thermal management, but also optimizes crash safety, which also increases the demands for the formability of the stainless steels. The comb…
View article: ESAFORM benchmark 2024: study on the geometric accuracy of a complex shape with single point incremental forming
ESAFORM benchmark 2024: study on the geometric accuracy of a complex shape with single point incremental forming Open
sponsorship: The Benchmark 2024 committee thanks ESAFORM for the supporting Benchmark Grant and the opportunity to conduct this in-depth benchmark study, fostering expertise sharing, knowledge transfer and collaboration with ISF research g…
View article: Increasing the displaced fluid volume of curved metal membranes for diaphragm compressors
Increasing the displaced fluid volume of curved metal membranes for diaphragm compressors Open
This study presents the development of an elastically deflectable, bistable diaphragm geometry that enables a significant increase in the displaced volume of diaphragm compressors compared to conventional flat diaphragms. The core concept …
View article: Validation of pneumatic crack detection in hole expansion test
Validation of pneumatic crack detection in hole expansion test Open
According to the standard ISO 16630, the hole expansion test (HET) has to be stopped at the instant when the first through-thickness crack appears at the edge of the hole. The detection of the crack is challenging, since the maximum openin…
View article: Design, Numerical and Experimental Testing of a Flexible Test Bench for High-Speed Impact Shear-Cutting with Linear Motors
Design, Numerical and Experimental Testing of a Flexible Test Bench for High-Speed Impact Shear-Cutting with Linear Motors Open
Given the use of high-strength steels to achieve lightweight construction goals, conventional shear-cutting processes are reaching their limits. Therefore, so-called high-speed impact cutting (HSIC) is used to achieve the required cut surf…
View article: Development of geometry variants and forming technology for metal diaphragms to increase the efficiency of diaphragm compressor
Development of geometry variants and forming technology for metal diaphragms to increase the efficiency of diaphragm compressor Open
This article outlines the development of an elastically foldable, bistable diaphragm geometry that enables an increase in the compression volume of diaphragm compressors compared to the use of flat diaphragms. Using a Finite Element Model …
View article: Prediction of Material Failure in Incremental Sheet Metal Forming
Prediction of Material Failure in Incremental Sheet Metal Forming Open
Incremental sheet metal forming offers the possibility of producing formed parts in small batches efficiently and in a resource-saving manner. However, in order to exploit this potential, a high level of process understanding and process-r…
View article: Automated hole expansion test with pneumatic crack detection
Automated hole expansion test with pneumatic crack detection Open
The hole expansion test according to ISO 16630:2009 is a widely used method for determining the edge crack sensitivity, e. g. for advanced high strength steels (AHSS). However, the optical crack detection causes a subjective stop of the te…
View article: Experimental study on incremental sheet forming of magnesium alloy AZ31 with hot air heating
Experimental study on incremental sheet forming of magnesium alloy AZ31 with hot air heating Open
Products of tomorrow are characterized by environmental sustainability, individuality and economic feasibility. This trend also occurs in the field of sheet metal forming. Lightweight materials such as magnesium alloys are applied to reduc…