Experimental and numerical investigations of evaluation criteria and material parameters' coupling effect on polypropylene scratch

Zhang, Jianwei; Jiang, Han; Jiang, Chaozhe; Kang, Guozheng; Kan, Qianhua; Li, Yonghua

doi:10.1002/pen.24538

Cited by 16 publications

(9 citation statements)

References 46 publications

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“…In general, ductile plastics tend to a regular appearance of the scratch groove, whereas brittle plastics often show an irregular scratch groove with chip formation [ 12 ]. Zhang et al [ 13 ] compared the critical normal load for the onset of scratch visibility to parameters obtained from FE-simulations. They found a strong negative correlation between the critical normal load and the tangential force during scratching as well as a good correlation between the critical normal load and the residual scratch depth.…”

Section: Introductionmentioning

confidence: 99%

“…They investigated the influence of rate-dependent mechanical properties on the scratch properties of flat polymer specimens, and found that the scratch process is mainly influenced by the tensile properties and especially the yield stress. Using FE-simulations, Zhang et al [ 13 ] found that the residual scratch depth is significantly influenced by the yield stress. With increasing yield stress, the residual scratch depth decreases.…”

Section: Introductionmentioning

confidence: 99%

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Correlation between Scratch Behavior and Tensile Properties in Injection Molded and Extruded Polymers

2022

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This study investigates the validity and applicability of the correlation between scratch and tensile properties for extruded polymer strands. The mechanical properties could be predicted for extruded samples, which allows skipping the step of injection molding and therefore enables a faster material development. Extruded polymer strands and tensile test specimens out of PMMA, PS, POM, PP and PE have been investigated. A correlation of the Young’s modulus and the elastic deformation as well as a correlation of the yield stress and the plastic deformation during scratching is given for both flat molded and cylindrical extruded specimens. SEM images of the scratch grooves are used to analyze the scratch deformation mechanism. The deformation mechanism correlates well to the variation coefficient of the indentation depth. Polarized light microscopy of thin cross sections of both types of specimens provides information about skin layer thickness and morphology. However, the optical analysis could not provide an explanation for the different levels of the indentation depth in the two specimen types. Further investigations should include a study of differences in process induced morphology and the effect of two layers with different mechanical properties, i.e., skin and center, on the stress and strain fields underneath the scratch.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Correlation between Scratch Behavior and Tensile Properties in Injection Molded and Extruded Polymers

2022

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“…Compared with traditional mechanical-property test methods, the scratch test method has low requirements for the tested sample and the destructiveness is small (Zhang et al , 2018; Zhang et al , 2020). When the scratch instrument has high displacement and force resolution, the results of scratch measurement are highly reproducible.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of hydrogen embrittlement by the scratch method

Wang

Zhang

et al. 2022

ACMM

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Purpose The purpose of this paper is to find a new method to evaluate the hydrogen embrittlement performance of heterogeneous materials and thin film materials. Design/methodology/approach The changes of hydrogen embrittlement properties of steel were studied by electrochemical hydrogen charging test and scratch test. The microstructure and properties of the alloy were analyzed by hardness tester, scanning electron microscope and three-dimensional morphology. The fracture toughness before and after hydrogen charging was calculated based on the scratch method. Findings The results showed that the hydrogen-induced hardening phenomenon occurs in the material after hydrogen charging. The scratch depth and width increased after hydrogen charging. The fracture toughness obtained by the scratch method showed that hydrogen reduces the fracture toughness of the material. The comparison error of fracture toughness calculated by indentation method was less than 5%. Originality/value The results show that the scratch method can evaluate the hydrogen embrittlement performance of the material. This method provides a possibility to evaluate the hydrogen embrittlement of thin-film and heterogeneous materials.

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“…However, a literature review conducted by the authors shows that only a few simulation studies are focused on the influence of surface texture. Almost all simulations are only for smooth surfaces without large material deformation and damage, and are aimed at studying the material behaviors during indentation [ 24 , 25 ] and scratching [ 26 , 27 , 28 , 29 , 30 , 31 ], the influence of material mechanical properties (elastic modulus, yield strength, Poisson’s ratio, coefficient of friction) [ 17 , 32 , 33 , 34 , 35 , 36 , 37 ], type of materials [ 24 , 26 , 27 , 38 ], surface texture [ 22 , 39 , 40 , 41 ] and roughness [ 42 , 43 ], interface interaction between rough material surface and scratch tip [ 44 , 45 , 46 , 47 , 48 ], and scratch visibility [ 18 , 49 , 50 ].…”

Section: Introductionmentioning

confidence: 99%

Finite Element Modelling and Experimental Validation of Scratches on Textured Polymer Surfaces

et al. 2021

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Surface texturing is a common modification method for altering the surface properties of a material. Predicting the response of a textured surface to scratching is significant in surface texturing and material design. In this study, scratches on a thermoplastic material with textured surface are simulated and experimentally tested. The effect of texture on scratch resistance, surface visual appearance, surface deformation and material damage are investigated. Bruise spot scratches on textured surfaces are found at low scratch forces (<3 N) and their size at different scratch forces is approximately the same. There is a critical point between the bruise spot damage and the texture pattern damage caused by continuous scratching. Scratch resistance coefficients and an indentation depth-force pattern are revealed for two textured surfaces. A texture named “Texture CB” exhibits high effectiveness in enhancing scratch visibility resistance and can increase the scratch resistance by more than 40% at low scratch forces. The simulation method and the analysis of the power spectral density of the textured surface enable an accurate prediction of scratches.

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Experimental and numerical investigations of evaluation criteria and material parameters' coupling effect on polypropylene scratch

Cited by 16 publications

References 46 publications

Correlation between Scratch Behavior and Tensile Properties in Injection Molded and Extruded Polymers

Correlation between Scratch Behavior and Tensile Properties in Injection Molded and Extruded Polymers

Evaluation of hydrogen embrittlement by the scratch method

Finite Element Modelling and Experimental Validation of Scratches on Textured Polymer Surfaces

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