Bochert, Thore
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Item-typ:Veröffentlichung, The impact of wear, contamination and substrate conditions on the pull off force of adhesive microstructures in relation to sustainable manufacturingMushroom shaped adhesive microstructures (MSAMS) provide the potential to grasp a wide variety of objects with minimal energy usage and are therefore particularly interesting for an automated and sustainable production. Investigating the influence of wear, contamination and substrate surface conditions on the adhesive force is crucial to assess their usability in non-laboratory conditions. In this work, the pull off force of MSAMS on additively manufactured specimens is measured during multiple cycles. The results show, that different surface finishes can lead to major changes of the resulting adhesive force. Adhesion is prevented by particle contamination but can be restored by cleaning.Konferenzbeitrag50 32 - Some of the metrics are blocked by yourconsent settings
Item-typ:Veröffentlichung, Finite element modelling of single dry-adhesive microstructures with a hyperelastic material model(Elsevier, 2025); ; ; ; Dry-adhesive microstructures made of silicone are an energy efficient tool for pick-and-place tasks with a diverse range of objects. Small-scale experiments with less than 50 individual adhesive elements provide the database for finite element modelling of single adhesive elements using a hyperelastic material model. Through experimental investigations and numerical parameter identification, a finite element simulation with a Neo-Hookean model was developed. The simulation could successfully describe the deformation during the compression phase. However, for the pulling phase a more complex material model, such as the Mooney-Rivlin or Ogden model in combination with a better representation of the incompressibility, is required.Konferenzbeitrag73 40 - Some of the metrics are blocked by yourconsent settings
Item-typ:Veröffentlichung, Releasing kinematics for energy efficient grippers based on dry-adhesive microstructuresGrippers based on mushroom shaped adhesive microstructures provide the potential to grasp a wide variety of objects with minimal energy usage. Once a sufficient contact is established, the adhesion is maintained without any further energy input. This is advantageous in terms of energy efficiency but can impede the process of releasing gripped objects if the adhesive force surpasses the weight force. Starting from mechanical releasing principles, two concept designs for dry-adhesive based grippers were developed. Experimental tests with simplified setups could prove the significant reduction in detachment force that is achieved by levering or rolling off the dry-adhesive tape.Konferenzbeitrag61 33