Evolution in Surfaces: Interaction of Topography with Contact Pressure During Wear of Composites Including Dinosaur Dentition
Evolution in Surfaces: Interaction of Topography with Contact Pressure During Wear of Composites Including Dinosaur Dentition
复制标题
表面演化：包括恐龙牙列在内的复合材料磨损过程中形貌与接触压力的相互作用
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
B. Krick
中科院分区：
文献类型：
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作者：
Kyle Rowe;G. Erickson;W. Sawyer;B. Krick
摘要
双参数弹性基础模型用于预测多组分复合材料表面接触压力和磨损的耦合演化。迭代模型预测在均匀施加压力下最初平坦的多组分表面的表面形状的演变；其中复合材料表面的成分是具有不同磨损率的不同材料。该模型用于通过化石牙齿组织测量的磨损率来阐明鸭嘴龙恐龙牙列的咀嚼表面形态。此外，为了进一步说明耦合接触压力和磨损模型的预测能力，制造了双组分聚合物样品并通过实验室磨损实验进行实验评估。将实验室多组分聚合物样品的磨料磨损测试获得的数据与使用测量的系统和材料参数的模型预测进行比较。测量的表面轮廓和预测的表面轮廓之间的差异与样品的表面粗糙度 (Ra ~3 µm) 处于同一数量级。
Abstract
A two-parameter elastic foundation model is used to predict the coupled evolution of contact pressure and wear of multicomponent composite surfaces. The iterative model predicts the evolution of surface shape for an initially flat multicomponent surface under uniform applied pressure; where the components of the composite surface are different materials of different wear rates. The model is applied to elucidate the chewing surface morphology of the dentition in a hadrosaurid dinosaur using wear rates measured from fossilized dental tissues. Additionally, to further illustrate the predictive capabilities of the coupled contact pressure and wear model, a two-component polymer sample was fabricated and experimentally evaluated through laboratory wear experiments. Data obtained from the abrasive wear testing of a laboratory multicomponent polymer sample was compared to model predictions using measured system and material parameters. Differences between the measured and predicted surface profiles were on the same order as the sample’s surface roughness (Ra ~3 µm).