铝用炭素材料弹性模量的测定方法探讨  

Discussion on the determination methods of the elasticity modulus of carbonaceous materials for aluminium production

作　　者：李荣柱 

机构地区：[1]中国铝业郑州研究院,河南郑州450041

出　　处：《炭素技术》2016年第5期61-64,共4页Carbon Techniques

摘　　要：铝用炭素材料的弹性模量与其抗热震性有很大的相关性。弹性模量测定分为静态法和动态法,而动态法又有横向振动共振法和纵向振动共振法两种不同的激振方式。从弹性模量的类别来说,静态法和纵向振动共振法都属于长度方向上的应力应变关系,也称之为杨氏模量,而横向振动共振法本质上是切变模量。铝用炭素材料因骨料颗粒较大,不能普遍适合采用横向振动共振法测定弹性模量,而静态法和纵向振动共振法能够很好地测定铝用炭素材料弹性模量。由于铝用炭素材料弹性形变阶段的非线性,采用静态法测定的结果明显要比纵向振动共振法小。鉴于铝用炭素材料在铝电解过程中处于受迫振动状态,采用纵向振动共振法测定弹性模量能够更加真实地反映铝电解生产的实际情况。The elasticity modulus of carbonaceous materials for aluminium production has great relevance with its thermal shock resistance. The determination of the elasticity modulus includes static method and dynamic method, and the latter has two kinds of exciting modes： transverse vibration resonance method and longitudinal vibration resonance method. According to the category of elasticity modulus, both static method and longitudinal vibration resonance method belong to the longitudinal stress-strain relationship, which is also called Young＇s modulus. Because of the larger aggregate particles, carbonaceous materials for aluminium production are not generally suitable for the transverse resonance method to determine the elasticity modulus, while static method and longitudinal vibration resonance method are both suitable to determine the elasticity modulus of carbonaceous materials for aluminium production. Because the strain of carbonaceous materials for aluminium is nonlinear during elastic deformation, the results by static method are obviously smaller than that by the longitudinal vibration resonance method. In view of carbonaceous materials for aluminium production are in the forced vibration state during the aluminum electrolysis process, the longitudinal vibration resonance method more accurately reflects the actual situation of aluminum electrolysis production.

关 键 词：铝用炭素材料 弹性模量 测定 

分 类 号：TB302.3[一般工业技术—材料科学与工程]