Scratch Behavior and Mechanical Properties of Polymeric Materials
Summary
The scratch performance of polymers arises from an interplay between surface deformation mechanisms and intrinsic mechanical properties. Under contact loading by a stylus or indenter, polymeric substrates may exhibit elastic recovery, viscoelastic flow or plastic ploughing, governed by factors such as yield stress, strain-rate sensitivity and material toughness. Surface roughness, filler content and interfacial adhesion further modulate the onset of damage, while phenomena such as stick–slip can induce wear structures and ripples at the nanoscale. Understanding these processes is critical for applications spanning automotive coatings, electronic housings and biomedical devices. Mechanical characterisation through scratch tests delivers metrics including scratch hardness, coefficient of friction and penetration depth, which correlate with tensile or flexural properties to guide material design. Numerical methods, notably finite element and cohesive zone modelling, complement experimental studies by revealing stress redistribution during interfacial failure and quantifying the roles of viscoelasticity and plasticity. Emerging trends focus on nanocomposite systems, multifunctional coatings and predictive modelling to achieve tailored scratch resistance, prolonging service life and ensuring aesthetic and functional integrity of polymer components.
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Scratch Behavior and Mechanical Properties of Polymeric Materials publication trend
The graph below shows the total number of articles in scratch behavior and mechanical properties of polymeric materials across all publications each year (not limited to Nature Index journals).
Technical terms
Scratch resistance: The ability of a material to resist surface damage under sliding or indentation loading.
Ploughing: Plastic deformation caused by the displacement of material ahead of a moving indenter, leading to groove formation.
Stick–slip: A cyclic friction phenomenon in which periods of static adhesion alternate with sudden sliding, often forming ripples.
Cohesive zone model: A numerical approach representing the process zone ahead of a crack or delamination, characterised by traction-separation laws.
References
- Towards understanding the surface rippling process by periodic reciprocal nanoscratching. Friction (2023).
- Effects of Interlaminar Failure on the Scratch Damage of Automotive Coatings: Cohesive Zone Modeling. Polymers (2023).
- Correlation between Scratch Behavior and Tensile Properties in Injection Molded and Extruded Polymers. Polymers (2022).
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