Quantifying fracture process zone evolution in magnesium-based wood-like material: Analysis based on digital image correlation and variation factor method
This study investigates the fracture behavior of magnesium-based wood-like material (MWM) under three-point bending using digital image correlation (DIC). The load-displacement curve exhibits asymmetric nonlinearity, reflecting sequential elastic deformation, plastic hardening, and post-peak progres...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-07-01
|
| Series: | Case Studies in Construction Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509525006011 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | This study investigates the fracture behavior of magnesium-based wood-like material (MWM) under three-point bending using digital image correlation (DIC). The load-displacement curve exhibits asymmetric nonlinearity, reflecting sequential elastic deformation, plastic hardening, and post-peak progressive softening. A novel Variation Factor Method (VFM) is proposed to quantify fracture process zone (FPZ) tip localization through displacement variation analysis. VFM achieves < 2.14 % deviation from conventional methods while significantly improving computational efficiency. The FPZ strain threshold εxx of MWM is determined as 2.1 × 10−3, AFPZ measures 315.02 mm2 at peak load and reaches a maximum value of 639.33 mm2 during post-peak damage progression. Plant fibers suppress crack propagation through a dual mechanism: plastic deformation dissipates energy within the FPZ, while elastic bridging redistributes stress, delaying post-peak degradation. These findings provide critical insights into multiscale damage mechanisms and offer a foundation for optimizing fracture-resistant quasi-brittle composites. |
|---|---|
| ISSN: | 2214-5095 |