Roland Lachmayer

ORCID: 0000-0002-3181-6323
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About
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Research Areas
  • Manufacturing Process and Optimization
  • Additive Manufacturing and 3D Printing Technologies
  • Additive Manufacturing Materials and Processes
  • Product Development and Customization
  • Design Education and Practice
  • Flexible and Reconfigurable Manufacturing Systems
  • Impact of Light on Environment and Health
  • Semiconductor Lasers and Optical Devices
  • Service and Product Innovation
  • Advanced optical system design
  • Digital Innovation in Industries
  • Laser Material Processing Techniques
  • Topology Optimization in Engineering
  • Ocular and Laser Science Research
  • Technology Assessment and Management
  • Research Data Management Practices
  • Advanced Optical Sensing Technologies
  • BIM and Construction Integration
  • Scientific Computing and Data Management
  • Photonic and Optical Devices
  • Human-Automation Interaction and Safety
  • Welding Techniques and Residual Stresses
  • Mechanical Engineering and Vibrations Research
  • Metal Forming Simulation Techniques
  • Surface Roughness and Optical Measurements

Leibniz University Hannover
2015-2024

Laser Zentrum Hannover
2017-2023

Gottfried-Wilhelm-Leibniz-Gesellschaft
2020-2023

Phoenix Contact (Germany)
2021-2023

Photonics (United States)
2023

Scientific Research and Development (Germany)
2023

Leibniz University of Applied Sciences
2012-2020

Renfe Operadora (Spain)
2019

Institut fuer Integrierte Produktion Hannover (Germany)
2016

Hella (Germany)
1999-2006

Additive manufacturing (AM) can be used to produce multi-material parts in which the material varied voxel-wise all three spatial directions. This means that paradigm of homogeneous abandoned and local effects such as heat conduction or damping selectively adjusted part. Recently, continuous development machine technology has allowed production multi-metal materials laser powder bed fusion (PBF-LB/MM). Compared other additive processes for production, this allows greater design freedom...

10.1016/j.heliyon.2023.e18301 article EN cc-by-nc-nd Heliyon 2023-07-26

Abstract Prosthetic implants, particularly hip endoprostheses, often lead to stress shielding because of a mismatch in compliance between the bone and implant material, adversely affecting implant’s longevity effectiveness. Therefore, this work aimed demonstrate computationally efficient method for density-based topology optimization homogenized lattice structures patient-specific endoprosthesis. Thus, root mean square error (RMSE) deviations physiological femur model optimized total...

10.1038/s41598-024-56327-4 article EN cc-by Scientific Reports 2024-03-08

Damping mechanisms are a crucial factor for influencing the vibration behavior of dynamic systems. In many applications vibrations undesirable and need to be reduced by appropriate measures. For instance, in vehicles can reduce driving comfort or civil engineering resonance damage occur constructions. An interesting cost-effective way increasing damping is particle damping. modern processes additive manufacturing, like laser powder bed fusion (LPBF), unmelted left inside structure on purpose...

10.1016/j.addma.2020.101752 article EN cc-by-nc-nd Additive manufacturing 2020-12-13

Additively manufactured particle dampers can significantly improve component damping. However, if designed incorrectly, the damping be worsened. For design of additively dampers, there are not yet sufficient rules and models to describe effect due numerous parameters. The research question answered in this paper describes how characterised as a function excitation force frequency for different cavity sizes. To characterise damping, 33 full factorial test plan is constructed, determined...

10.3390/app12042237 article EN cc-by Applied Sciences 2022-02-21

Light detection and ranging (LiDAR) are fundamental sensors that help driving tasks for autonomous at various levels. Commercially available systems come in different specialized design schemes involve plenty of specifications. In the literature, there insufficient representations technical requirements LiDAR automotive context, such as range, quality, resolving power, field view, eye safety. For this reason, above require to be derived based on ADAS functions. The key metrics, including...

10.3390/s22197532 article EN cc-by Sensors 2022-10-04

Additive manufacturing using Powder Bed Fusion by Laser Beam (PBF-LB) enables products with high design freedom. In addition, the ability to process more than one material in all three spatial directions makes it possible produce highly functional components single process. This article investigates whether multi-material PBF-LB is suitable for producing coils electric motors, which are designed integrated cooling channels increase power density. For this purpose, copper alloy CuCr1Zr and...

10.1016/j.addlet.2023.100165 article EN cc-by-nc-nd Additive Manufacturing Letters 2023-07-27

This study introduces a hybrid modeling approach for manufacturing processes, combining constraint‐based process model with case‐based reasoning (CBR). The formalizes geometric transformations, material behaviors, and constraints through explicit mathematical expressions. CBR integrates knowledge from simulations experimental data, enabling the representation of complex nonlinear relationships without full formalization. supports manufacturability analyses during product design by creating...

10.1002/adem.202401359 article EN cc-by Advanced Engineering Materials 2025-03-26

The deep-drawability of a sheet metal blank is strongly influenced by the tribological conditions prevailing in deep-drawing process. Therefore, new methods to influence tribology represent an important research topic. In this work, application process-integrated lubrication process investigated. Most promising geometries channels and outlet openings are first identified means numerical simulation at example demonstrator Cylindrical test specimens with specified channel additively...

10.3390/jmmp6050121 article EN cc-by Journal of Manufacturing and Materials Processing 2022-10-14

Abstract Research in modularization of product families reveals numerous individual cause and effect impacts modularity on a firm. There are clearly many interrelated positive negative economic arising from different activities the firm impacted by modular structures. This makes construction an business case for difficult, where often benefits reduced indirect costs. paper presents literature-based network model how structures affect firm’s economics across design-to-manufacturing life cycle...

10.1115/1.4044914 article EN Journal of Mechanical Design 2019-09-19

Abstract The introduction of adaptive front lighting systems for vehicles has increased road safety and drivers’ comfort significantly within the last years. A next step in this development is realization higher resolution to further increase functionality vehicle headlamps toward fully systems. In paper, we present a short overview on highly dynamic essential technologies their realization. Different approaches are compared evaluated regarding applications headlamp As an example on-road...

10.1515/aot-2016-0001 article EN Advanced Optical Technologies 2016-03-08
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