Optimization and Validation of a Load-Controlled Numerical Model for Single Asperity Scratch

Stress state characterization of ductile materials during scratch abrasion

“…This consideration was verified with the output of internal (IE) and kinetic (KE) energy, where kinetic energy (KE) was found to be less than 1 % of the internal energy of the model for all simulations performed. These energy outputs were obtained using specific target time increment (TTI) value that was carefully chosen [36], which verifies the validity…”

“…3) Experimentally [35] (scratch) tested martensitic steel (MS) which was also used for validating the finite element model [36].…”

“…This study makes use of a previously developed and experimentally validated finite element model [36] of a two-body scratch abrasion event. An example contour plot (von Mises stress) of a scratch simulation is shown in Fig.…”

“…For the majority of simulations documented in this paper, a friction coefficient of 0.1 was arbitrarily defined to the contact [7]. Other influencing factors such as mass scaling effects, computational power optimization study, and mesh design are detailed in the previously validated finite element model [36]. The model is considered as quasi-static.…”

“…Hereto, the stress tensor invariants and plastic deformations is mapped within elastic-plastic simulations of scratch abrasion for a variety of scenarios (different materials and degrees of penetration), covering ploughing, and scenarios that would in reality lead to wedging and cutting. For this purpose, an experimentally validated finite element model [35,36] is used. The observed structural responses are critically discussed to motivate suggestions for a selection of suitable damage models for different modes of scratch abrasion.…”