Controlling fracture cascades through twisting and quenching

Area of Science:

• Materials Science
• Physics
• Mechanical Engineering

Background:

• Fracture limits structural integrity across scales, from macroscopic beams to microscopic nanotubes.
• While bending-induced fracture is well-studied, twist and quench dynamics remain underexplored for fracture control.
• Feynman's observation on spaghetti fracture highlights the complexity of brittle rod failure.

Purpose of the Study:

• To investigate the systematic control of fracture in brittle elastic rods using twist and quench dynamics.
• To explore novel fracture protocols beyond traditional bending stresses.
• To provide a theoretical and experimental framework for understanding twist- and quench-controlled fracture.

Main Methods:

• Combining theoretical modeling with experimental investigations.
• Implementing controlled twisting protocols on brittle elastic rods.
• Utilizing nonadiabatic quenching techniques to induce fracture.
• Analyzing fracture patterns and comparing with theoretical predictions.

Main Results:

• Demonstrated controlled binary fracture of brittle elastic rods through twist and nonadiabatic quench protocols.
• Experimental data for twist-controlled fracture quantitatively matched a predicted phase diagram.
• Established asymptotic scaling relations for fracture dynamics under quenching.
• Showcased the potential for precise fracture control in brittle materials.

Conclusions:

• Twist and quench dynamics offer effective methods for controlling fracture in brittle elastic rods.
• The developed protocols and theoretical frameworks are broadly applicable to various fracture processes.
• Results are expected to inform fracture control in diverse systems, from engineered materials to biological structures.