TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Kossa, Attila A1 - Hensel, René A1 - McMeeking, Robert M. T1 - Adhesion of a cylindrical punch with elastic properties that vary radially JF - Mechanics Research Communications N2 - The adhesion of a rigid substrate and an adhered straight cylindrical punch with a non-homogeneous elastic modulus is analyzed. The stress distributions are obtained along the interface for various elastic modulus gradients. The calculations are performed in the commercial finite element software Abaqus using a user material (UMAT) subroutine to control the dependence of Young’s modulus on the radial position. The UMAT code is shared in the paper. The results reveal that the decreasing elastic modulus toward the perimeter of the punch can be used to significantly reduce the normal stress magnitudes in the singularity domain, which leads to stronger adhesion. The increase in the adhesion strength is characterized numerically. The effect of Poisson’s ratio is also analyzed. KW - gecko KW - adhesion KW - dry adhesive KW - UMAT subroutine KW - fibrillar structure Y1 - 2023 UN - https://nbn-resolving.org/urn:nbn:de:bsz:291:415-6883 SN - 1873-3972 SS - 1873-3972 U6 - https://doi.org/10.1016/j.mechrescom.2023.104123 DO - https://doi.org/10.1016/j.mechrescom.2023.104123 VL - 130 SP - 104123 ER -