Experimental and dimensional characterization of a prototype piston-cylinder unit and validation using finite element analysis (FEA)

Yagmur, Levent; Bağlı, Emir Fatih

doi:10.1016/j.measurement.2008.11.001

Cited by 4 publications

(3 citation statements)

References 3 publications

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“…where P 1 is the applied pressure and P 2 is the pressure at the top of the engagement length, u(x) is the piston deviation, U(x) is the cylinder deviation, h o is the initial clearance between piston-cylinder unit and r p o is the undistorted radius of the piston [16]. Figure 4 shows a view of piston-cylinder clearance; with indication of radial changes between the piston and cylinder in their engagement length (defined as the coupling length of piston and cylinder between x = 0 and x = l).…”

Section: Calculation Detailsmentioning

confidence: 99%

A comparative approach for the characterization of a pneumatic piston gauge up to 8 MPa using finite element calculations

Dogra¹,

Singh²,

Lodh³

et al. 2010

Meas. Sci. Technol.

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This paper reports the behavior of a well-characterized pneumatic piston gauge in the pressure range up to 8 MPa through simulation using finite element method (FEM). Experimentally, the effective area of this piston gauge has been estimated by cross-floating to obtain A 0 and λ. The FEM technique addresses this problem through simulation and optimization with standard commercial software (ANSYS) where the material properties of the piston and cylinder, dimensional measurements, etc are used as the input parameters. The simulation provides the effective area A p as a function of pressure in the free deformation mode. From these data, one can estimate A p versus pressure and thereby A o and λ. Further, we have carried out a similar theoretical calculation of A p using the conventional method involving the Dadson's as well as Johnson-Newhall equations. A comparison of these results with the experimental results has been carried out.

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Section: Calculation Detailsmentioning

confidence: 99%

A comparative approach for the characterization of a pneumatic piston gauge up to 8 MPa using finite element calculations

Dogra¹,

Singh²,

Lodh³

et al. 2010

Meas. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…Many reports have been published on the calculation of the effective area dimensionally and calculated the uncertainty using MCM and LPU. However, none of them compared the values of effective area and uncertainty calculated from the dimensional, MCM, and LPU methods [7,[25][26][27][28][29]. After the invention of MCM, metrology scientists and many industries as well have been using MCM to calculate the uncertainty [25,30].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of effective area of air piston gauge with limitations in piston–cylinder dimension measurements

et al. 2021

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The air piston gauge (APG) has been established at the National Physical Laboratory, India (NPLI) for Pascal realization since 2002. The APG at NPLI has been considered a transfer pressure standard because it has been calibrated against the primary pressure standard, i.e. ultrasonic interferometer manometer. As per existing international protocol, the APG establishment as a primary standard, the effective area (A e) of piston–cylinder (p–c) assembly and masses must be directly traceable to SI units. We have calculated A e and associated uncertainty of p–c assembly using the theory of rarefaction gas dynamics, which is based on dimension measurements. The value of A e is obtained for varying temperatures and radii of piston and cylinder in their respective uncertainty limits. The variation of the cylinder's inner radius within its uncertainty limit of 0.7 µm includes the expected effective area, i.e. 3.356 775 (5) cm2. The effective area’s expected values are obtained for the cylinder’s radius of 10.338 00 (2) mm, which is approximately 0.65 µm away from the value obtained from dimensional measurements and well within the uncertainty limit. Therefore, to get the effective area of 3.356 775 (5) cm2, the uncertainty of the cylinder’s radius should be at least one order less (similar to piston’s radius) than that of the present value. The precision in dimension measurement of the cylinder's internal radius is the critical parameter for effective area calculation of p–c assembly.

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“…This fact has caused the use of simulation to be extended to different phases of new product development. Thus, for example, FEM has been used in the early stages of conceptual design (Husslage et al, 2003), in the detailed design phase (Ko, 2013) and even in the functional testing and validation of the product after the first prototype has been manufactured (Yagmur and Bagli, 2009). In like fashion, optimization techniques that are based on genetic algorithms (GAs) have been used in combination with the FEM to identify the most important parameters of the materials (Lostado et al, 2011) and to optimize mechanical components (Corriveau et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Pugh’s Total Design: The design of an electromagnetic servo brake with ABS function – a case study

Villanueva

Lostado-Lorza

Bobadilla

2016

Concurrent Engineering

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Traditionally, design activities cover a wide range of interrelated activities: mechanical design, industrial design, electronic design and civil design, to name a few. Pugh’s Total Design method consists of several core activities that complement and influence each another. Core activities are the basis of the development of the product design specification, the conceptual design, the detailed design, the product’s manufacture and final product sales. A systematic approach is proposed in this article to convert design requirements into an optimal design concept choice. The approach is based on Pugh’s method to design a new electromagnetic servo brake with antilock braking system function. The product design specifications were obtained by the functional analysis method that Tassinari proposed. Also, the Pugh controlled convergence method was used to select the best conceptual design. A combination of the finite element method and multi-objective optimization based on genetic algorithms was used in the detail phase to obtain the optimal geometry of the servo that was designed, while maximizing the braking force and minimizing the current supplied by the battery and the weight of the assembly. The close agreement between the experimental results obtained suggests that Pugh’s Total Design method, combined with the functional analysis method, the Pugh controlled convergence method, the finite element method and genetic algorithms, may be used successfully to design and optimize any electromechanical device.

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Experimental and dimensional characterization of a prototype piston-cylinder unit and validation using finite element analysis (FEA)

Cited by 4 publications

References 3 publications

A comparative approach for the characterization of a pneumatic piston gauge up to 8 MPa using finite element calculations

A comparative approach for the characterization of a pneumatic piston gauge up to 8 MPa using finite element calculations

Evaluation of effective area of air piston gauge with limitations in piston–cylinder dimension measurements

Pugh’s Total Design: The design of an electromagnetic servo brake with ABS function – a case study

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