Assessment of a finite element model for plate shearing

Domblesky, Joseph P.; Zhao, Longfei

doi:10.1243/0954405021520210

Cited by 7 publications

(3 citation statements)

References 17 publications

(30 reference statements)

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“…Early investigations on SP indicated a generic model for the plate deformation in equation (3). [15][16][17][18][19][20][21][22] This Huber's equation relates the distributed force r, and the lateral deformation w at coordinate (x, y).…”

Section: Review Of the Metrological Surfacesmentioning

confidence: 99%

A new method of optimizing the thickness of metrological surface plate using simulation analysis

Rab

Sanjid

Zafer

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part B:

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The challenges of choosing an optimally thick surface plate (SP) were noticed during the calibration of pressure measuring instruments against pressure balance type primary and secondary standards. This has motivated authors to investigate this issue in detail. It is observed that the traditional workstation made of steel sheets may not be flat enough to generate accurate pressure measurement results. These SPs are also regularly used in the metrology laboratories, inspection rooms, and manufacturing industries. Whenever precise and accurate measurements and inspections are performed, the irregularities of the working surfaces lead to incorrect results. Therefore, focused research is carried out by analyzing some of the standard granite plates. Usually, manufacturers design, fabricate, and install the SPs as per the recommendation of the respective documentary standards. The standards provide the requirements and specifications of the flatness tolerances for different sizes of the SPs. However, these standards do not precisely specify the optimum thickness of the SP. Standards also suggest using finite element analysis to avert complex mathematical procedures. The simulation method precisely represents the individual case of installation/design. Therefore, the bending cases due to self-weight and rigidity tests are simulated to determine the deformations of the various sizes of granite SPs. Their results led to devising the proposed optimization of the thickness of metrological surface plates. In the present investigation, granite SPs of different sizes are simulated. The critical thickness is observed when the deformation reduces to its optimum level. The surface deflection against the load is minimum at critical thickness values. The results obtained in the optimization are compared with the standard values.

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Section: Review Of the Metrological Surfacesmentioning

confidence: 99%

A new method of optimizing the thickness of metrological surface plate using simulation analysis

Rab

Sanjid

Zafer

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part B:

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“…19 They studied the effect of shear parameters such us shear clearance, edge radius, and damage factor. 20 The influence of shear speed on the quality of shape and edge-face of sheared pure aluminum disk and ring shearing was proven. 21 The conclusion the authors came up with is that smaller clearance and higher shear rate are needed to produce a better edge-face quality.…”

Section: Introductionmentioning

confidence: 98%

Parametric study of aluminum bar shearing using Johnson-Cook material modeling

Moakhar

Hentati

Barkallah

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part B:

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Previous studies of the shearing process demonstrated that clearance and shear rate are the most influential parameters on the geometry of sheared billets. This paper illustrates a parametric numerical study of the impact of these parameters on the quality of the shear surface using the finite element simulation of shearing. In order to account for interactions between stress state evolution and the associated heating during shearing, a fully coupled thermo-mechanical simulation method was adopted. The influence of stress state, strain rate, and temperature on the material behavior were taken into account by using Johnson-Cook plasticity and ductile failure models. Many simulations were carried out involving diverse shear rates and shear clearances. The relationship between the parameters of shear surface geometry and the temperature was illustrated and proven. Contrary to the expectation of high-speed shearing performance, a burr free smooth shear surface was found using a low shear rate. This study illustrates a numerical strategy to determine the best shear clearance-rate set for aluminum alloy Al7075-T6 bars that minimizes the shear surface defects.

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“…15 Obviously, while the machining of the composite panels might be dependent upon and thereby reveal some of the inherent shearing characteristics of the carbon fibers, the direct extrapolation of these results to carbon fiber severing is relatively difficult. On the other hand, the dynamics of the carbon fiber severing might be regarded as somewhat closer to that encountered in common sheet metal cutting (shearing) operations like blanking, slitting, trimming, and so on that were investigated in a separate category of studies such is-for instance-the case of Domblesky and Zhao 16 that was focused on the development of a simulation model for plate shearing. However, the materials investigated in the studies involving sheet metal shearing/trimming were invariably homogeneous and hence the proposed cutting mechanisms are likely of limited applicability to the inhomogeneous structure of the carbon fibers whose bundles/strands/rovings generally comprise tens of thousands of carbon filaments typically of 6-12 mm in diameter.…”

Section: Introductionmentioning

confidence: 99%

Instrumented linear cutting device for the analysis of fiber severing process

Adamovsky

Alexander

Kaptur

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part B:

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In recent years, stringent governmental regulations along with falling carbon fiber prices have pushed high-volume composite manufacturing somewhere at the top of the “to do” list for the majority of carmakers. However, a careful survey of the literature reveals that little is available on the topic of high-throughput severing of the carbon fibers, one of the principal constituents of carbon fiber reinforced polymers. To address this relative paucity of valid scientific information, the major goal of this study was to develop a robust and accurate experimental apparatus capable of establishing correlations between the amount of cutting force developed at the blade/fiber tow/deformable backing interface and various process parameters such as fiber material, tow and backing characteristics, blade geometry/material, and so on. The characteristic cutting force–position curves obtained by means of the developed device suggest that (1) the cutting forces require to cut glass fibers are typically larger (up to 27% observed in this study), (2) softer backings tend to have a positive effect on the fiber severing process both in terms of peak cutting force and total work to cut, and (3) dull blades require either larger severing forces (60 µm blade edge radius was associated with a 21% increase in cutting force) or are simply unable to produce severing of the fibers (80 µm blade edge radius). Future extensions of this work will focus on the determination of systematic correlations between the parameters of fiber severing process.

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Assessment of a finite element model for plate shearing

Cited by 7 publications

References 17 publications

A new method of optimizing the thickness of metrological surface plate using simulation analysis

A new method of optimizing the thickness of metrological surface plate using simulation analysis

Parametric study of aluminum bar shearing using Johnson-Cook material modeling

Instrumented linear cutting device for the analysis of fiber severing process

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