Improving Archard’s Wear Model: An Energy-Based Approach

IF 2.9 3区 工程技术 Q2 ENGINEERING, CHEMICAL
Jamal Choudhry, Andreas Almqvist, Roland Larsson
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Abstract

Archard’s wear law encounters challenges in accurately predicting wear damage and volumes, particularly in complex situations like asperity–asperity collisions. A modified model is proposed and validated, showcasing its ability to predict wear in adhesive contacts with better accuracy than the original Archard’s wear law. The model introduces an improved wear coefficient linked to deformation energy, creating a spatially varying relationship between wear volume and load and imparting a non-linear characteristic to the problem. The improved wear model is coupled with the Boundary Element Method (BEM), assuming that the interacting surfaces are semi-infinite and flat. The deformation energy is calculated from the normal contact pressure and displacements, which are the common outputs of BEM. By relying solely on these outputs, the model can efficiently predict the correct shape and volume of the adhesive wear particle, without resorting to large and often slow models. An important observation is that the wear coefficient is expected to increase based on the accumulated deformation energy along the direction of frictional force. This approach enhances the model’s capability to capture complex wear mechanisms, providing a more accurate representation of real-world scenarios.

Abstract Image

改进阿卡德磨损模型:基于能量的方法
阿卡德磨损定律在准确预测磨损损害和磨损量方面遇到了挑战,尤其是在非晶体-非晶体碰撞等复杂情况下。我们提出并验证了一个修正模型,该模型能够预测粘合剂接触中的磨损,其准确性优于原始的阿卡德磨损定律。该模型引入了与变形能量相关的改进型磨损系数,在磨损量和载荷之间建立了空间变化关系,并为问题带来了非线性特征。改进后的磨损模型与边界元素法(BEM)相结合,假设相互作用的表面是半无限的平面。通过法向接触压力和位移(BEM 的常见输出)计算变形能量。通过完全依赖这些输出,该模型可以有效地预测粘合磨损颗粒的正确形状和体积,而无需求助于大型且通常速度较慢的模型。一个重要的观察结果是,基于沿摩擦力方向累积的变形能量,磨损系数有望增加。这种方法增强了模型捕捉复杂磨损机制的能力,更准确地反映了真实世界的情况。
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来源期刊
Tribology Letters
Tribology Letters 工程技术-工程:化工
CiteScore
5.30
自引率
9.40%
发文量
116
审稿时长
2.5 months
期刊介绍: Tribology Letters is devoted to the development of the science of tribology and its applications, particularly focusing on publishing high-quality papers at the forefront of tribological science and that address the fundamentals of friction, lubrication, wear, or adhesion. The journal facilitates communication and exchange of seminal ideas among thousands of practitioners who are engaged worldwide in the pursuit of tribology-based science and technology.
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