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The ideal shock absorber combines high stiffness with high energy absorptionwhilst retaining structural integrity after impact and is scalable forindustrial production. So far no structure meets all of these criteria. Here,we introduce a special occurrence of plastic buckling as a design concept formechanical metamaterials that combine all the elements required of an idealshock absorber. By striking a balance between plastic deformation and buckling,which we term yield buckling, these metamaterials exhibit sequential, maximallydissipative collapse combined with high strength and the preservation ofstructural integrity. Unlike existing structures, this design paradigm isapplicable to all elastoplastic materials at any length scale and hence willlead to a new generation of shock absorbers with enhanced safety andsustainabilty in a myriad of high-tech applications.

Leveraging yield buckling to achieve ideal shock absorbers