摘要
以完全基于实际材料、工艺参数的数值模型为基础,对金属橡胶的干摩擦迟滞特性进行了研究。从成形压力曲线、材料组织结构、尺寸、加载-卸载曲线等4个方面对数值模型的可靠性进行了验证。建立了弹性微元模型及其局部坐标,对接触对数量、滑动接触对比例、接触对形态进行了研究。接触对数量随加载量的增加而增加,随卸载量的增加而减小,滑动接触对约占所有接触对数量的80%。将接触对分为典型接触对和非典型接触对,其中典型接触对占主要成分。根据接触对的细观特征,建立了接触对力学模型,进而建立了金属橡胶迟滞特性曲线的数学模型。数学模型准确性、可靠性较好,各参数物理意义充分,能够较好地对材料的干摩擦迟滞特性进行描述,对材料的设计具有一定指导意义。
Based on a numerical model established absolutely with actual material and process parameters,dry friction hysteresis characteristics of metal rubber were studied.The numerical model was verified from the four respects:forming force,material structure,size and loading-unloading curve.The elastic micro element model and its local coordinates were established.The number of contact pairs,sliding contact pairs ratio and status of contact pairs were studied.Results show that contact pairs increase in number with the increasing loading and decreases with the increasing unloading,which accounts for nearly 80% of all contact pairs.The contact pairs were divided in two kinds:typical contact pairs and untypical pairs,and the typical contact pairs were the main components.According to the meso-characteristics of contact pairs,a contact pair mechanical model and a mathematic model of metal rubber hysteresis were established.It is found that the mathematic model is accurate and reliable,and its parameters have clear physical meaning.The hysteresis of metal rubber can be described well with the mathematic model and metal rubber products can be designed with the formulas.
作者
黄凯
白鸿柏
路纯红
曹凤利
高洪飞
Huang Kai;Bai Hongbai;Lu Chunhong;Cao Fengli;Gao Hongfei(Engineering University of the Army,Shijiazhuang 050003,China;Baicheng Weaponry Test Centre,Baicheng 137000,China)
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2018年第11期3451-3459,共9页
Rare Metal Materials and Engineering
基金
武器装备"十二五"预先研究项目
关键词
金属橡胶
数值模型:干摩擦
迟滞特性
细观机理
metal rubber
numerical model
dry friction
hysteresis characteristics
meso-mechanism
