Experimental and numerical damage assessment of PLA based on young’s modulus reduction using the bonora damage model
Year: 2025
Type: article
Abstract: The goal of this paper is to experimentally and numerically investigate damage evolution in PLA+ materials, based on the reduction of Young’s modulus during cyclic loading–unloading tests. Standard tensile specimens were fabricated via FDM 3D printing and tested under displacement-controlled cyclic loading, while strain was measured using both extensometer and digital image correlation. The Bonora damage model was calibrated for PLA+ by fitting the damage parameter to experimental plastic strain data. The obtained constants (Dcr=0.20, εth=0.012, εf=0.042, α=0.76) were implemented in a custom VUSDFLD subroutine in ABAQUS. The finite element simulations successfully predicted final failure, showing good agreement with the experimental damage parameter evolution. The numerical predictions deviated <5 % from experimental results, confirming the high accuracy of the Bonora-based model implementation. This combined experimental–numerical framework provides a reliable basis for predicting progressive damage in PLA+ components under quasi-static loading. The novelty of this work lies in the calibration of the Bonora model for PLA+, which shows enhanced ductility compared to conventional PLA, and in demonstrating its potential for reliable application in both engineering load-bearing structures and biodegradable biomedical devices.
Source: Forces in Mechanics
Authors: Mohammad Ali Kazemi, Seyedsajad Jafari, Mostafa akbari
Language: English
Subfield: Mechanics of Materials
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,050
OpenAlex ID: W4417290779