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Final shape of precision molded optics: Part II - Validation and sensitivity to material properties and process parameters

Research output: Contribution to journalArticleScientificpeer-review

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Final shape of precision molded optics : Part II - Validation and sensitivity to material properties and process parameters. / Ananthasayanam, Balajee; Joseph, Paul F.; Joshi, Dhananjay; Gaylord, Scott; Petit, Laeticia; Blouin, Vincent Y.; Richardson, Kathleen C.; Cler, Daniel L.; Stairiker, Matthew; Tardiff, Matthew.

In: JOURNAL OF THERMAL STRESSES, Vol. 35, No. 7, 01.07.2012, p. 614-636.

Research output: Contribution to journalArticleScientificpeer-review

Harvard

Ananthasayanam, B, Joseph, PF, Joshi, D, Gaylord, S, Petit, L, Blouin, VY, Richardson, KC, Cler, DL, Stairiker, M & Tardiff, M 2012, 'Final shape of precision molded optics: Part II - Validation and sensitivity to material properties and process parameters', JOURNAL OF THERMAL STRESSES, vol. 35, no. 7, pp. 614-636. https://doi.org/10.1080/01495739.2012.674838

APA

Ananthasayanam, B., Joseph, P. F., Joshi, D., Gaylord, S., Petit, L., Blouin, V. Y., ... Tardiff, M. (2012). Final shape of precision molded optics: Part II - Validation and sensitivity to material properties and process parameters. JOURNAL OF THERMAL STRESSES, 35(7), 614-636. https://doi.org/10.1080/01495739.2012.674838

Vancouver

Ananthasayanam B, Joseph PF, Joshi D, Gaylord S, Petit L, Blouin VY et al. Final shape of precision molded optics: Part II - Validation and sensitivity to material properties and process parameters. JOURNAL OF THERMAL STRESSES. 2012 Jul 1;35(7):614-636. https://doi.org/10.1080/01495739.2012.674838

Author

Ananthasayanam, Balajee ; Joseph, Paul F. ; Joshi, Dhananjay ; Gaylord, Scott ; Petit, Laeticia ; Blouin, Vincent Y. ; Richardson, Kathleen C. ; Cler, Daniel L. ; Stairiker, Matthew ; Tardiff, Matthew. / Final shape of precision molded optics : Part II - Validation and sensitivity to material properties and process parameters. In: JOURNAL OF THERMAL STRESSES. 2012 ; Vol. 35, No. 7. pp. 614-636.

Bibtex - Download

@article{ed9b9bcfc2d540fa9d3d535f84d8c074,
title = "Final shape of precision molded optics: Part II - Validation and sensitivity to material properties and process parameters",
abstract = "In Part I of this study a coupled thermo-mechanical finite element model for the simulation of the entire precision glass lens molding process was presented. That study addressed the material definitions for the molding glass, L-BAL35, computational convergence, and how the final deviation of the lens shape from the mold shape is achieved for both a bi-convex lens and a steep meniscus lens. In the current study, after validating the computational approach for both lens types, an extensive sensitivity analysis is performed to quantify the importance of several material and process parameters that affect deviation for both lens shapes. Such a computational mechanics approach has the potential to replace the current trial-and-error, iterative process of mold profile design to produce glass optics of required geometry, provided all the input parameters are known to sufficient accuracy. Some of the critical contributors to deviation include structural relaxation of the glass, thermal expansion of the molds, TRS and viscoelastic behavior of the glass and friction between glass and mold. The results indicate, for example, the degree of accuracy to which key material properties should be determined to support such modeling. In addition to providing extensive sensitivity results, this computational model also helps lens molders/machine designers to understand the evolution of lens profile deviation for different lens shapes during the course of the process.",
keywords = "Aspherical glass lens, Coupled thermo-mechanical numerical simulation, Micron deviation, Structural relaxation, Temperature dependent material parameters, Viscoelasticity",
author = "Balajee Ananthasayanam and Joseph, {Paul F.} and Dhananjay Joshi and Scott Gaylord and Laeticia Petit and Blouin, {Vincent Y.} and Richardson, {Kathleen C.} and Cler, {Daniel L.} and Matthew Stairiker and Matthew Tardiff",
year = "2012",
month = "7",
day = "1",
doi = "10.1080/01495739.2012.674838",
language = "English",
volume = "35",
pages = "614--636",
journal = "JOURNAL OF THERMAL STRESSES",
issn = "0149-5739",
publisher = "Taylor & Francis",
number = "7",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Final shape of precision molded optics

T2 - Part II - Validation and sensitivity to material properties and process parameters

AU - Ananthasayanam, Balajee

AU - Joseph, Paul F.

AU - Joshi, Dhananjay

AU - Gaylord, Scott

AU - Petit, Laeticia

AU - Blouin, Vincent Y.

AU - Richardson, Kathleen C.

AU - Cler, Daniel L.

AU - Stairiker, Matthew

AU - Tardiff, Matthew

PY - 2012/7/1

Y1 - 2012/7/1

N2 - In Part I of this study a coupled thermo-mechanical finite element model for the simulation of the entire precision glass lens molding process was presented. That study addressed the material definitions for the molding glass, L-BAL35, computational convergence, and how the final deviation of the lens shape from the mold shape is achieved for both a bi-convex lens and a steep meniscus lens. In the current study, after validating the computational approach for both lens types, an extensive sensitivity analysis is performed to quantify the importance of several material and process parameters that affect deviation for both lens shapes. Such a computational mechanics approach has the potential to replace the current trial-and-error, iterative process of mold profile design to produce glass optics of required geometry, provided all the input parameters are known to sufficient accuracy. Some of the critical contributors to deviation include structural relaxation of the glass, thermal expansion of the molds, TRS and viscoelastic behavior of the glass and friction between glass and mold. The results indicate, for example, the degree of accuracy to which key material properties should be determined to support such modeling. In addition to providing extensive sensitivity results, this computational model also helps lens molders/machine designers to understand the evolution of lens profile deviation for different lens shapes during the course of the process.

AB - In Part I of this study a coupled thermo-mechanical finite element model for the simulation of the entire precision glass lens molding process was presented. That study addressed the material definitions for the molding glass, L-BAL35, computational convergence, and how the final deviation of the lens shape from the mold shape is achieved for both a bi-convex lens and a steep meniscus lens. In the current study, after validating the computational approach for both lens types, an extensive sensitivity analysis is performed to quantify the importance of several material and process parameters that affect deviation for both lens shapes. Such a computational mechanics approach has the potential to replace the current trial-and-error, iterative process of mold profile design to produce glass optics of required geometry, provided all the input parameters are known to sufficient accuracy. Some of the critical contributors to deviation include structural relaxation of the glass, thermal expansion of the molds, TRS and viscoelastic behavior of the glass and friction between glass and mold. The results indicate, for example, the degree of accuracy to which key material properties should be determined to support such modeling. In addition to providing extensive sensitivity results, this computational model also helps lens molders/machine designers to understand the evolution of lens profile deviation for different lens shapes during the course of the process.

KW - Aspherical glass lens

KW - Coupled thermo-mechanical numerical simulation

KW - Micron deviation

KW - Structural relaxation

KW - Temperature dependent material parameters

KW - Viscoelasticity

UR - http://www.scopus.com/inward/record.url?scp=84863468684&partnerID=8YFLogxK

U2 - 10.1080/01495739.2012.674838

DO - 10.1080/01495739.2012.674838

M3 - Article

VL - 35

SP - 614

EP - 636

JO - JOURNAL OF THERMAL STRESSES

JF - JOURNAL OF THERMAL STRESSES

SN - 0149-5739

IS - 7

ER -