| Measurement of elastic modulus and evaluation of viscoelasticity of foundry green sand |
| |
| 摘 要： | Elastic modulus is an important physical parameter of molding sand; it is closely connected with molding sand's properties. Based on theories of rheology and molding sand microdeformation, elastic modulus of molding sand was measured and investigated using the intelligent molding sand multi-property tester developed by ourselves. The measuring principle was introduced. Effects of bentonite percentage and compactibility of the molding sand were experimentally studied. Furthermore, the essential viscoelastic nature of green sand was analyzed. It is considered that viscoelastic deformation of molding sand consists mainly of that of Kelvin Body of clay membrane, and elastic modulus of molding sand depends mainly on that of Kelvin Body which is the elastic component of clay membrane between sands. Elastic modulus can be adopted as one of the property parameters, and can be employed to evaluate the viscoelastic properties of molding sand.
|
Measurement of elastic modulus and evaluation of viscoelasticity of foundry green sand |
| |
| Qingchun XIANG,Zuxi XIE,Fengwen ZHANG. Measurement of elastic modulus and evaluation of viscoelasticity of foundry green sand[J]. China Foundry, 2004, 1(1) |
| |
| Authors: | Qingchun XIANG Zuxi XIE Fengwen ZHANG |
| |
| Abstract: | Elastic modulus is an important physical parameter of molding sand; it is closely connected with molding sand's properties. Based on theories of rheology and molding sand microdeformation, elastic modulus of molding sand was measured and investigated using the intelligent molding sand multi-property tester developed by ourselves. The measuring principle was introduced. Effects of bentonite percentage and compactibility of the molding sand were experimentally studied. Furthermore, the essential viscoelastic nature of green sand was analyzed. It is considered that viscoelastic deformation of molding sand consists mainly of that of Kelvin Body of clay membrane, and elastic modulus of molding sand depends mainly on that of Kelvin Body which is the elastic component of clay membrane between sands. Elastic modulus can be adopted as one of the property parameters, and can be employed to evaluate the viscoelastic properties of molding sand. |
| |
| Keywords: | molding sand viscoelasticity elastic modulus clay membrane Kelvin Body |
| 本文献已被 万方数据 等数据库收录！ |
