The Stress Field at an Axial Eccentrical Fatigue Loading – Influenced by the Test Temperature

By applying a cyclic eccentrically tensile loading, oscillatory positive, determines at the crack peak that exist in a plate specimen CT type a compound loading of bending with tensile. The aim of the study is to analyze the equivalent stress variation σ, when the working temperature varies, namely: T= 293K (+20°C), T= 253K (-20C) and T= 213K (-60°C). The specimens are made from a stainless steel 10TiNiCr175 type, and were loaded with the asymmetry coefficient R= 0.1. There are drawn the variation curves of stress versus the crack length variation, σ(a), versus the material durability, σ(N), and respectively versus the stress intensity factor, σ(ΔK), for the three loading temperatures.