Finite Element Prediction of Deformation of Material due to Springback after Material Removal of a Forging

The material removal depth in the pre-polishing stage of the precision optics is usually tens of microns to remove the subsurface damage and grinding marks left by the previous grinding process. This processing of the upstand edge takes a large part of the time at this stage. The purpose of this paper is to develop a method that can reduce the edge effect and largely shorten the processing time of the pre-polishing stage adopting the semirigid (SR) bonnet. The generation of the edge effect is presented based on the finite element analysis of the contact pressure at the edge zone firstly. Then, some experimentations on the edge effect are conducted, and the results proved that the SR bonnet tool can overhang the workpiece edge in the pre-polishing stage to reduce the width and height of the upstand edge to largely shorten the subsequent processing time of it. In addition, there exists a perfect overhang ratio, which generates the upstand edge with the smallest width and height, with no damage to the bonnet tool in the meantime. In addition, one combination of the pre-polishing parameters is concluded according to this method, which can be safely adopted in practical process.

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Finite element prediction of fatigue damage growth in cancellous bone

Computer Methods in Biomechanics & Biomedical Engineering ◽

10.1080/10255842.2015.1048687 ◽

2015 ◽

Vol 19 (5) ◽

pp. 563-570 ◽

Cited By ~ 3

Author(s):

Ridha Hambli ◽

Sana Frikha ◽

Hechmi Toumi ◽

João Manuel R. S. Tavares

Keyword(s):

Finite Element ◽

Fatigue Damage ◽

Cancellous Bone ◽

Damage Growth ◽

Finite Element Prediction

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Finite element prediction on the structural performance of profiled steel sheet dry board structural composite system proposed as a disaster relief shelter

Construction and Building Materials ◽

10.1016/j.conbuildmat.2004.07.019 ◽

2005 ◽

Vol 19 (4) ◽

pp. 285-295 ◽

Cited By ~ 5

Author(s):

Ehsan Ahmed ◽

Wan Hamidon Wan Badaruzzaman

Keyword(s):

Finite Element ◽

Steel Sheet ◽

Composite System ◽

Disaster Relief ◽

Structural Performance ◽

Structural Composite ◽

Finite Element Prediction

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Embankment on sludge: predicted and observed performances

Canadian Geotechnical Journal ◽

10.1139/t07-004 ◽

2007 ◽

Vol 44 (5) ◽

pp. 545-563 ◽

Cited By ~ 13

Author(s):

Tien H Wu ◽

Steven Z Zhou ◽

Stephan M Gale

Keyword(s):

Finite Element ◽

Water Treatment ◽

Input Data ◽

Bayesian Updating ◽

Full Scale ◽

The Finite Element Method ◽

Water Treatment Sludge ◽

History Of ◽

Finite Element Prediction ◽

Test Embankment

The case history of an embankment built over soft water-treatment sludge is presented. To assure that the sludge would consolidate and gain strength as predicted, a test embankment was built. The observed performance of the test embankment was compared with the predicted performance to verify and modify design assumptions. The results were used to design and construct the full-scale embankment. The finite element method and the critical state model were used to predict the performances of the test embankment and the full-scale embankment. Bayesian updating and system identification were used to update the material properties used in the prediction for the test embankment. The updated properties were then used to update the prediction for the test embankment and to predict the performance of the full-scale embankment. These predictions were compared with the observed performances to evaluate the accuracies of the predictions with different input data. Efforts were made to identify factors that cause differences between predicted and measured performances.Key words: Bayesian updating, consolidation, finite-element prediction, shear strength, stability, water-treatment sludge.

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