Issue 77

T. Hachimi et alii, Fracture and Structural Integrity, 77 (2026) 173-206; DOI: 10.3221/IGF-ESIS.77.11

Figure 8: Strain distribution progression in a sample with an internal defect subjected to tensile loading [28].

Application Domain

Method / Technology

Key Insights & Practical Implications

Main Findings

Ref

Simulation-in-the loop & Deep Learning 3D-DIC Topology Extraction

Enabled real-time defect detection and closed-loop process adjustment. Quantifies relationships between building irregularities and microstructural defects. Strain discontinuities at polymer interfaces (e.g., PLA-ABS) act as precursors to delamination. Increased recycled content leads to heterogeneous strain fields due to crystallinity variations. Strain localizes on diagonal struts; energy absorption scales with relative density. Resolves rapid strut buckling and plastic hinge formation in energy absorbers. Tracks crack initiation sites and propagation rates under repetitive stress. Mineral oil increases elongation by 76% (plasticization); moisture degrades Nylon strength. Real-time strain mapping enables early damage detection and proactive maintenance.

Transition from «as-designed» to «as-built» quality control reduces material waste and rework. Robust framework for in-process quality assurance; minimizes warping and residual stress. Interface adhesion is the dominant failure driver; it necessitates optimized deposition sequences. DIC correlates processing induced morphology changes with mechanical performance loss. Scaled unit-cell testing allows for precise validation of nonlinear collapse models in complex geometries. Standard static tests fail to capture rate-dependent failure modes essential for protective equipment. Vital for assessing long-term reliability and predicting fatigue life of AM parts. Environmental exposure significantly alters the «weld» quality between filaments, affecting long-term durability. Positions DIC at the nexus of material characterization and intelligent health monitoring.

In-situ Monitoring

[36,62]

Process Validation

[22,79]

Multi-material Interfaces

Full-field DIC Strain Mapping

[68,78]

DIC Strain Heterogeneity Mapping

Recycled Blends

[12]

Architected Lattices

3D-DIC & SAMP 1 Modeling

[15,88]

High-Speed Impact

Ultrahigh-speed DIC (UHS-DIC)

[10]

Fatigue Analysis

Cyclic DIC Strain Mapping DIC in Thermal/Humidity Chambers

[115]

Environmental Coupling

[48]

Structural Health Monitoring

DIC + Sensor Networks

[63,117]

189