Impact modelling for shot peening or peen forming has progressed from simulating a single impact (or local multiple impacts) to simulating a large number of multiple impacts. It is the aim of this paper to provide quantitative results with a detailed finite element study, and to compare the effects of a single impact and global multiple impacts. Using a two-dimensional (2D) axisymmetric single ...

Al 2024-T351 has been modeled using a kernel-based multi-variate Gaussian Process approach. The Gaussian Process model projects fatigue affecting input variables to output crack growth by probabilistically inferring the underlying nonlinear relationship between input and output. The Gaussian Process approach not only explicitly models the uncertainty due to scatter in material microstructure pa...

Prediction of crack growth and fatigue life estimation of metals using linear/nonlinear acousto-ultrasound methods is an ongoing issue. It is known that by measuring nonlinear parameters, the relative accumulated fatigue damage can be evaluated. However, there is still a need to measure two crack propagation states to assess the absolute residual fatigue life. A procedure based on the measureme...