Detachment fronts and the onset of dynamic friction

Article Abstract:

The dynamics between two brittle acrylic (polymethyl-methacrylate, PMMA) blocks that are separated by a rough interface and consisting of discrete randomly distributed microcontacts are studied. The measurements suggest that a slow detachment front always occur as isolated events or in combination with more rapid modes and significant amount of slip is caused due to the slow fronts.

United States, Plastics Material and Resin Manufacturing, Plastics materials and resins, Polymethyl Methacrylate, Polymethylmethacrylate, Friction

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Close-up on cracks

Article Abstract:

Different materials cope with the mathematical singularity at the tip of a crack and as a crack becomes infinitely sharp, it gives rise to infinite stresses. Thus cracks in a material play a key role as stress enhancers.

Fracture (Materials)

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Propagating solitary waves along a rapidly moving crack front

Article Abstract:

Research is presented concerning the movement of tensile cracks in a brittle material and the formation of planar surfaces with moving edges. The dynamics of the cracks and the formation of front waves are discussed.

Analysis, Physics, Letter to the Editor, Materials research, Perturbation (Quantum dynamics), Perturbation (Mathematics)

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