# Nanoindentation stress-strain for Fracture Analysis and computational modeling for hardness and modulus

## TL;DR

This paper investigates nanoindentation stress-strain behavior to analyze fracture phenomena, introduces a new shape factor approach for crack analysis, and models hardness and modulus responses through polynomial fitting.

## Contribution

It presents a novel shape factor method for fracture analysis and explores polynomial fitting of hardness and modulus in nanoindentation studies.

## Key findings

- Transition from ductile to brittle fracture with increased load
- Shape factors effectively characterize crack branching and micro-cracking
- Polynomial coefficients modulate hardness and modulus responses

## Abstract

Stress-strain plots based on nanoindentation load-depth curves reflected cracking phenomenon. A transition from ductile to brittle fracture was observed on increasing the depth or load of indenter penetration. A new approach with shape factors in the fracture studies based on radial crack branching and micro-cracking was done. Hardness and modulus plots were fitted with polynomials. The coefficients were varied to obtain different hardness and modulus responses.

---
Source: https://tomesphere.com/paper/1704.04525