matlab导入excel代码-Spin:球形纳米压痕应力应变分析

# Spin Spherical nanoindentation stress-strain analysis ## Please read [Spherical Nanoindentation Stress-Strain Analysis in MATLAB.pdf](https://github.com/jsweaver/Spin/blob/master/Spherical%20Nanoindentation%20Stress-Strain%20Analysis%20in%20MATLAB.pdf) for an introduction to the code. ## ## Helpful References: ## (1) Kalidindi and Pathak. (2008) Acta Materialia. http://dx.doi.org/10.1016/j.actamat.2008.03.036 (2) Vachhani et al. (2013) Acta Materialia. http://dx.doi.org/10.1016/j.actamat.2013.03.005 (3) Pathak and Kalidindi. (2015) Materials Science and Engineering R. http://dx.doi.org/10.1016/j.mser.2015.02.001 (4) Weaver et al. (2016) Acta Materialia. (Supplemental Material) http://dx.doi.org/10.1016/j.actamat.2016.06.053 ## Purpose and Intended Use: ## The main reason for writing this code was to make the determination of the zero-point correction and indentation stress-strain curves more robust by semi-automating the analysis, developing metrics for determining appropriate answers, and providing some estimate of the uncertainty of the appropriate answer including measurements from the indentation stress-strain curve (e.g. indentation yield strength). The intended use is that the user would select a representative answer for each test and include the statistics of multiple appropriate answers for one test when determining the final answer, values, or properties. ## Short Discription of Functions ## **RunME.m** - load, analyze, plot, save data with this script. Most of the parameters which require adjusting are set in this script. **LoadTest.m** - imports nanoindentation in excel format. Important to set/check the indenter properties, the "End of Test" marker, and correct columns of raw data. CSM corrections are also calculated in here. **smoothstrain.m** - applies a moving average to the hardening fit stress-strain data. Not always used. **filterResults.m** - cuts down the results based on different criteria. A new criterion can be added by coping the 'case' logic used for other variables. **CalcStressStrainWithYield.m** - here is where the indentation stress-strain curve is calculated **FindYield_v2.m** - function for determining the yield point and hardening slopes. **FindYieldStart.m** - function for determining if a pop-in occurs and some markers needed for determining the yield point **MyPlotSearch.m** - plotting function for the 3-D scatter plot of the results. In order to change the axes of the 3-D plot, modify this code and in SearchExplorer.m **NIAnalyzeSearch.m** - this function does the zero=point and modulus regression analyses. It gets called many times so try not to add more to it. A speed up in computation might come from better coding with this function and the sub functions it calls. **MyHistSearch.m** - plotting function for histograms of relevant variables in the results. Viewing this data can be helpful for updating the filter to determine the results. **SearchExplorer.m** - interactive plotting function for the 3D scatter plot for the results. *Important* - the scaling of the indentation stress-strain curve plot is done manually because it always causes problems. Find the variables: mstrain and mstress and adjust accordingly. **subslider.m** - creates a subplot of historgrams for many vairables. A NewFilt variable can be created based on the slider values of all the variables in the plot. **MyHistResults.m** - spits out the statistics for indentation properties for the saved analyses. Shouldn't have to touch these... **Driver.m** **SingleSearchAllSegments.m** **mypolyfit.m** **rsquare.m**