Modulate stress distribution with bio-inspired irregular architected materials towards optimal tissue support.

Area of Science:

• Materials Science
• Bioengineering
• Computational Mechanics

Background:

• Natural materials possess irregular architectures enabling advanced functionalities like mechanical stress modulation.
• Mechanical stress modulation is vital for biological processes such as homeostasis and tissue remodeling.

Purpose of the Study:

• To investigate the link between architectural irregularity and stress modulation in bio-inspired materials.
• To develop a computational framework for designing irregular architected materials with tailored mechanical properties.

Main Methods:

• A generative computational framework was employed to optimize building block distribution.
• Irregular materials with heterogeneous, disordered microstructures were assembled.
• Experimental validation using 3D-printed samples was performed.

Main Results:

• Assembled irregular materials exhibited spatially varying properties that precisely modulated stress distribution.
• The generated materials successfully mimicked the stress modulation capabilities of natural materials.
• Experimental results showed good agreement with the targeted stress distributions.

Conclusions:

• Irregularity in bio-inspired architected materials is key to achieving sophisticated stress modulation.
• These stress-programmable materials hold potential for orthopedic applications, particularly in bone defect repair.
• The computational framework provides a novel approach to designing functional architected materials.