In this paper we present a theoretical study of the cylindrical punch test where a thin circular film clamped at the periphery is adhered to the planar surface of a rigid cylindrical punch, and an external tensile load is applied to the punch causing the film to delaminate from the substrate. We obtain analytical solutions to the deflection of the membrane in the asymptotic limit of large or sm...

The microstructure and mechanical properties of mechanically alloyed spark plasma sintered AlCoFeMnNi-xB (x = 0, 0.5, 1, 5 at. %) high-entropy alloys (HEAs) have been investigated. Boron-doped HEAs were synthesized using alloying up to 50 h milling. Synthesized powders then consolidated at 850, 900, 950 °C for 10 min under a uniaxial pressure 40 MPa sintering (SPS). A scanning electron microsco...

BACKGROUND Punch instrument is a circular blade that can be used for many diagnostic and therapeutic purposes in different medical and surgical specialties. Punch surgery (or biopsy) is achieved by using this versatile punch blade under local anesthesia. Basic punch surgery is quick and easy to learn. Complications such as bleeding and infection are minimal. Diagnostic punch surgery can obtain ...