An insight into the identifiability of material properties by instrumented indentation test using manifold approach based on P-h curve and imprint shape

In situ nanoindentation method for characterizing tensile properties of AISI 1045 steel based on mesomechanical analysis

“…The reasons for the significant difference between simulation results and experimental results are as follows: one is the non-uniqueness of indentation test identification results [31][32][33] and the other is the effect of small cracks on material surface during tensile test. The results of elastic modulus are the same as those of the traditional nanoindentation method, because the elastic modulus of the material is determined by the chemical composition of the materials and has nothing to do with the metallographic structure.…”

On the value of test data for reducing uncertainty in material models: Computational framework and application to spherical indentation

“…We represent the application of our proposed computational framework to rank not only the different responses of an indentation test, but also the different response spaces. This contrasts with the current state of practice where study of the indentation test responses is done deterministically and limited to ranking the known material responses at a limited number of observations [17][18][19]. Nevertheless, we note here that the choice of the spherical indentation test in this work is only for the sake of illustration and the approaches and tools that comprise the proposed framework are applicable to other material characterization tests.…”

“…Thanks to recent developments in inverse identification methods, indentation tests, which are often used to measure or compare the hardness of materials, are also being employed to identify the mechanical behavior of the materials in a broader sense [17][18][19][40][41][42][43][44][45][46][47][48][49][50][51]. While indentation test responses may be used to infer different material models, in this study, we opt for the elastoplastic material model characterization with a focus on the influence of different uncertainty sources on the uncertainty of the inferred hardening material model parameters.…”

“…The measurement of the indenter displacement is affected by the compliance of the parts between the indenter and the displacement sensor. Therefore, when the knowledge of the machine compliance and the indenter is not readily available, the residual imprint, is introduced as the material response to identify the elastoplastic models [17][18][19]54]. The residual imprint response Y is represented as a function of the spatial coordinate X, e.g.…”

“…Several studies in material model identification literature have studied the value of the material response candidates in a deterministic way [17][18][19]. For instance, in the study conducted in [19], the weighted sum of residual imprint responses obtained in an indentation test was employed to form the material response to identify the hardening parameters.…”