Deformation Of Contact Surface Research Articles

Deformation of contact surface between an agricultural tyre and soils

Deformation of contact surface between an agricultural tyre and soils

An Analysis of the Elastic and Plastic Deformation of Machined Surfaces in Contact : 4th Report, Deformation of Contacting Rough Surfaces when Directional Asperities and Nondirectional Ones are in Contact

When machined surfaces are divided into directional asperities and nondirectional ones, the analysis of normal deformations at metal joints are classified as follows. (i) Contact between directional asperities and a flat surface. (ii) Contact between two surfaces with directional asperities whose directions are crossed each other. (iii) Contact between two surfaces with nondirectional asperities. (iv) Contact between directional asperities and nondirectional ones. In this report, the elastic deformation and the plastic one for the 4th case were analyzed. Projections of directional asperities and nondirectional ones were assumed as wedge shape and conic one respectively. The elastic deformation and the plastic one at metal joints were synthesized by statistic of surface asperities in contact. Results were as follows. (1) Relation between the deformations and the normal pressure is linear on a double logarithmic paper. (2) The deformations are classified by the contact surface coefficient.

An Analysis of the Elastic and the Plastic Deformation of Machined Surfaces in Contact : 4th Report, Deformations of Contacting Rough Surfaces when Directional Asperities and Non-Directional Ones are in Contact

An Analysis of the Elastic and the Plastic Deformation of Machined Surfaces in Contact : 4th Report, Deformations of Contacting Rough Surfaces when Directional Asperities and Non-Directional Ones are in Contact

An Analysis of the Elastic and the Plastic Deformation of Machined Surfaces in Contact : 5th Report, Formulas on Deformations of Plane Joints Machined by Various Methods for Practical Use

An Analysis of the Elastic and the Plastic Deformation of Machined Surfaces in Contact : 5th Report, Formulas on Deformations of Plane Joints Machined by Various Methods for Practical Use

An Analysis of the Elastic and the Plastic Deformation of Machined Surfaces in Contact : 2nd Report, Calculation and Experiment on Deformation of Rough Surfaces in Contact

An Analysis of the Elastic and the Plastic Deformation of Machined Surfaces in Contact : 2nd Report, Calculation and Experiment on Deformation of Rough Surfaces in Contact

An Analysis of the Elastic and the Plastic Deformation of Machined Surfaces in Contact : 1st Report, Deformation of Contacting Rough Surfaces when the Directions of Surface Asperities Cross Each Other

An Analysis of the Elastic and the Plastic Deformation of Machined Surfaces in Contact : 1st Report, Deformation of Contacting Rough Surfaces when the Directions of Surface Asperities Cross Each Other

An Analysis of the Elastic and the Plastic Deformation of Machined Surfaces in Contact : 3rd Report, On the Contact of Surfaces Whoee Asperities do not have Directional Qualities

An Analysis of the Elastic and the Plastic Deformation of Machined Surfaces in Contact : 3rd Report, On the Contact of Surfaces Whoee Asperities do not have Directional Qualities

An Analysis of the Deformation of Contacting Rough Surfaces : 4th Report. Formulae for Practical Use on Deformation of Plane Joints Making the Directions of Surface Asperities Parallel to Each Other

Contact of rough surfaces can be replaced by that between a rough surface and a rigid flat one, so that the methods of the 3rd report can be reapplied here. In this report, the factors of surface asperities (for example, slope and height of surface asperities in contact) were synthesized, and formulae for practical use on the elastic and the plastic deformation of rough surfaces in contact when the directions of surface asperities were parallel to each other were suggested. This report revealed that the variance of slope of surface asperities of surface asperities in contact is σθ12+ σθ22, where σθ12, σθ22 are variances of slope of projections respectively. As a result, the relations between the elastic and the plastic deformations δE, δS yielded by the existence of surface asperities and the normal load are as follows. δ^-E=ae{(P^-+P^-0) } where, δ^-E=δE/σ, δ^-S=δS/σ, σ: standard deviation of surface asperity in contact, P^-=P/Apm, A: nominal contact area, pm : plastic flow pressure, ae, as, P^-0 : constants. These constants were given in this research.