Question

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The optics department at the University of Arizona conducted an indentation test with a 10-mm radius 6061 aluminum sphere pressing a 20-mm radius optical glass (BK7) sphere of radius 20 mm with a force of 300 N. The Young's modulus and the Poisson's ratio of 6061 Al are respectively 69 GPa and 0.33, whereas those of BK7 are 82 GPa and 0.206 respectively. Find the radius of the circular contact area and the maximum pressure between the spheres. 2.

Answer 1

Alumimium sphere ulabs (SKT) Sphere 0.33 3 2 2 0 33 - O. 20O No rom eq 75

0.333 mm 2 ATI a 2 2 300 2 A 0.3S