Boundary 1.3

Boundary 1.3 - Acoustic emissions in the fracture...

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University of Virginia, MSE 4270/6270: Introduction to Atomistic Simulations, Leonid Zhigilei Acoustic emissions in the fracture simulation in 2D model Figure by B.L. Holian and R. Ravelo, Phys. Rev. B51, 11275 (1995). Atoms are colored by velocity relative to the left-to-right local expansion velocity, which causes the crack to advance from the bottom up.
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University of Virginia, MSE 4270/6270: Introduction to Atomistic Simulations, Leonid Zhigilei Combined MD - FEM Technique Equations of motion: M i d 2 r i /dt 2 = - U(r 1 , r 2 …. r N ) for MD part [M] d 2 a/dt 2 = -[ K]a + F ext for FEM part MD part Transition zone FEM part [ K ] and [ M ] – stiffness and mass matrices a – displacements of nodes [ K ] is defined by the geometry of the elements and elastic moduli of material
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University of Virginia, MSE 4270/6270: Introduction to Atomistic Simulations, Leonid Zhigilei Combined MD - FEM Technique. Example: laser-induced pressure wave Propagation of the laser induced pressure wave from the ablation region through
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This note was uploaded on 02/14/2012 for the course MSE 4270 taught by Professor Zhigilei during the Fall '11 term at UVA.

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Boundary 1.3 - Acoustic emissions in the fracture...

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