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This presentation by Ashley Lantz explores the intricacies of stress waves and dynamic buckling. It delves into how changes and discontinuities create shock waves and the implications of elastic stress wave velocities on material behavior. A detailed examination of dynamic buckling as a function of stress wave velocity is provided, alongside considerations for future research including plastic waves, large deformation effects, and 3-dimensional analysis. The talk concludes with open questions, inviting further discussion on these critical topics in material science.
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Structures Initial Stress Wave and Buckling Calculations Ashley Lantz
Presentation Outline • Stress Waves and Shock Waves • Dynamic Buckling • Conclusions Ashley Lantz
Stress Waves • Change or discontinuity creates Shock Waves • Same velocity for Elastic Stress Waves • Where ce is the elastic stress wave velocity, E is Young’s Modulus and ρ is the density Ashley Lantz
Stress Wave Velocity [m/s] Ashley Lantz
Dynamic Buckling • Function of Elastic Stress Wave Velocity • Not Plastic Waves • Where σ is the stress in the material, L is the length of the penetrator, c is the elastic stress wave velocity, ρ is the density and h is the diameter Ashley Lantz
Buckling Stress [m/s] Ashley Lantz
Future Work • Plastic Waves • Changes due to Large-Deformation • Changes due to 3-Dimensional Analysis • Dynamic Buckling • Restorive Forces Ashley Lantz
