ANALYSIS OF STRESSES IN THE PLASTIC RANGE AROUND A CIRCULAR HOLE IN A PLATE SUBJECTED TO UNIAXIAL TENSION

摘要

An approximate theoretical solution is presented for the stress in the plastic range around a circular hole in an infinite sheet subjected to uniaxial tension. The solution is based on the simple defor¬mation theory of plasticity and is found by application of a variation principle in conjunction with the Rayleigh-Ritz procedure and the use of a high-speed computing machine (SEAC). Numerical results are obtained for four different materials, which are characterized by four distinct uniaxial stress-strain curves. The results for stress concentration factor in the plastic range are compared with those obtained from a formula due to Stowell.