Frictional Contact Finite Element Analysis of Pneumatic Cylinders

Abstract

Friction is present in most mechanical systems. The aim of this paper is to analyse friction between a pneumatic cylinder and its piston seal using the finite element method (FEM Keywords Friction, finite element method (FEM), pneumatic cylinder, hyperelastic material model IntroductionFor industrial automation speed and reliability with simple construction and effortless maintenance are the most wanted properties. These demands can be ensured by pneumatic actuators. These devices transform pneumatic energy into linear motion. This paper examines a double acting pneumatic cylinder (Fig. 1). The compressed air enters into the tube and moves the piston in both extend and retract strokes. The pressure p 2 on the piston imparted by the air creates the driving force F. The double acting cylinders are used when the driving force is important in both directions. The seals in cylinders are o-rings or membranes. Studying the factors affecting the piston motion are important for the control. Friction has a high priority, because this nonlinear factor causes the difficulty of the exact location / velocity control.

Application of Silica–Coated Magnetite on a Steel Plate and its Frictional and Thermal Effect

“…In the engine, the friction between two moving parts (e.g., gears and piston) could not be eliminated as part of their primary function and only can be reduced to a certain level [1][2][3][4]. The friction could also cause heat and damage to the components.…”

“…The friction could also cause heat and damage to the components. Thus, the manufacturer or industry has to spend high maintenance costs to replace the components that contribute to the overall energy losses [1][2][3][4]. An effective lubrication system plays an essential role in mechanical equipment due to the high mechanical failure caused by friction and wears [5,6].…”

Stress Analysis of the Rotating Circular Saw Blade

“…Cutting speed is, however, in comparison with the linear motion much higher, thus the cutting path in the workpiece can be considered an arc without committing an error. [1,[3][4][5][6] The working parts of the tool are chosen based on the ability of the cutting edge to easily enter the material (low cutting resistance) in order to properly form and easily drain the waste chip, prolong the durability of the cutting edge and prevent it from warming up. Requirements for woodworking circular saw blades can be summarized [10,17] as:…”