ACMIT at „11. Kongress der Deutschen Gesellschaft für Biomechanik (DGfB)“

The DGfB 2019 took place from April 3rd to April 5th in Berlin.

At this congress ACMIT was represented by Sarah-Jane Estermann, who presented the poster “Comparison of Tactile Properties of Liver Tissue and 3D Printing Materials via Macroindentation” .

The aim of this study was to establish a method for identifying mechanical parameters that represent the tactile properties – the way a material feels to touch – of liver tissue, in order to compare these with the properties of artificial materials that could possibly be used in 3D printing (Shore A 13 silicone pure and with different silicone oil concentrations, gelatin, and a soft commercially available 3D printed polymer).

For this reason, a steel ball of 15 mm diameter was utilized to approximate a fingertip, which indented the samples with a similar load protocol as a human palpating the material would. The experiments were load driven up to 5 N and conducted as a quasi-static loading-unloading sequence, with additional measurements of the surface hardness of the materials. Thus, the identified parameters included contact stiffness S of the unloading curve, overall equivalent spring stiffness k, and Shore 00 Hardness H.

For more information about the congress please visit

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