Modeling the Age-related Decrease in Ballistic Limit Velocity of Polycarbonate Vision Panels Using a Johnson-Cook Material Model Coupled with Variable Failure Criteria
1
Institute for Machine Tools and Factory Management, TU Berlin, Germany
2
Fraunhofer Institute for Production Systems and Design Technology IPK, Fraunhofer, Germany
Submission date: 2023-04-24
Acceptance date: 2023-05-29
Online publication date: 2023-06-08
Publication date: 2023-09-30
Corresponding author
Nils Bergström
Institute for Machine Tools and Factory Management, TU Berlin, Pascalstraße 8-9, 10587, Berlin, Germany
Institute for Machine Tools and Factory Management, TU Berlin, Pascalstraße 8-9, 10587, Berlin, Germany
Journal of Machine Engineering 2023;23(3):86-97
KEYWORDS
TOPICS
ABSTRACT
Machine tools are equipped with polycarbonate vision panels that allow the operator to observe the machining process and protect him from ejected fragments. Adequate protection is demonstrated by impact tests. However, polycarbonate is subject to aging processes, which diminish the protective performance of such panels. This paper presents an approach for modelling aging effects on the ballistic limit velocity of polycarbonate using Finite Element simulations. A Johnson Cook material model in conjunction with variable failure criteria was used for the simulations. Aging effects on the ballistic limit velocity were included in the model by adjusting the failure criteria. Material parameters and failure criteria were derived from experimental impact and tensile tests on unaged and aged polycarbonate specimen. The numerical results predict the ballistic limit velocity with a maximum deviation of 0.98 %. The model provides a more in-depth understanding of the aging effects on the safety performance of polycarbonate vision panels.
REFERENCES (19)
1.
NEUDÖRFER A., 2021, Konstruieren Sicherheitsgerechter Produkte, Springer Berlin Heidelberg, Berlin, Heidelberg.
2.
DIN EN ISO, 14120, 2015 Safety of Machinery – Guards - General Requirements for Design and Construction of Fixed and Movable Guards, ISO Copyright Office, Vernier, Geneva.
3.
DIN EN ISO, 23125, 2015, Machine Tools – Safety – Turning Machines, ISO Copyright Office, Vernier, Geneva.
4.
BEN-DOR G., DUBINSKY A., ELPERIN T., 2013, High-Speed Penetration Dynamics, World Scientific Publishing, Singapore.
5.
LANDI L., UHLMANN E., HÖRL R., THOM S., GIGLIOTTI G., STECCONI A., 2022, Evaluation of Testing Uncertainties for the Impact Resistance of Machine Guards, ASCE-ASME J. Risk and Uncert., Engrg. Sys., Part B, Mech. Engrg., 2.
6.
UHLMANN E., POLTE M., HÖRL R., BERGSTRÖM N., THOM S., WITTWER P., 2021, Experimental Investigation of the Kink Effect by Impact Tests on Polycarbonate Sheets, Proceedings of the 31st European Safety and Reliability Conference.
7.
LANDI L., PERA F., MORETTINI G., DEL PRETE E., RATTI C., 2022, Ejection Test Requirements for Parts of Machine Tools: Part 2 Testing Energy Equivalence Hypothesis and Weak Points of Vision Panels, Proceedings of the 32nd European Safety and Reliability Conference (ESREL 2022).
8.
BOLD J., 2004, Trennende Schutzeinrichtungen für Werkzeugmaschinen zur Hochgeschwindigkeitsbearbeitung, Dissertation, Technische Universität Berlin.
9.
DUCHSTEIN B., 2010, Aufprallprüfungen an Definiert Gealterten Polycarbonat Sichtscheiben, Futur: Vision, Innovation, Realisierung, Mitteilungen aus dem Produktionstechnischen Zentrum (PTZ), 1, 6–7.
10.
LAU K., 2006, Plasmagestützte Aufdampfprozesse für die Herstellung Haftfester Optischer Beschichtungen auf Bisphenol-A Polycarbonat, Dissertation, Martin-Luther-Universität Halle-Wittenberg.
11.
LANDI L., STECCONI A., VITTORI M., PERA F., 2021, Effect of Sunlight Exposition on Withstanding Capability of Thin Polycarbonate Sheets, Proceedings of the 31st European Safety and Reliability Conference.
12.
UHLMANN E., HABERBOSCH K., THOM S., DRIEUX S., SCHWARZE A., POLTE M., 2019, Investigation on the Effect of Novel Cutting Fluids with Modified Ingredients Regarding the Long-Term Resistance of Polycarbonate Used as Machine Guards in Cutting Operations (KSS-PC), Proceedings of the 29th European Safety and Reliability Conference.
13.
DIN EN ISO, 527–2, 2012, Plastics - Determination of Tensile Properties, ISO Copyright Office, Geneva.
14.
DWIVEDI A., BRADLEY J., CASEM D., 2012, Mechanical Response of Polycarbonate with Strength Model Fits, Aberdeen.
15.
RECHT R.F., IPSON T.W., 1963, Ballistic Perforation Dynamics, Journal of Applied Mechanics, 30, 384–390.
16.
LAMBERT J.P., JONAS G.H., 1976, Towards Standarization in Terminal Ballistic Testing: Velocity Representation, Maryland.
17.
SARVA S., MULLIKEN A.D., BOYCE M.C., 2007, Mechanics of Taylor Impact Testing of Polycarbonate, International Journal of Solids and Structures, 7–8, 2381–2400.
18.
STOMMEL M., 2011, FEM zur Berechnung von Kunststoff- und Elastomerbauteilen, Hanser Verlag, München.
19.
JOHNSON G.R., COOK W.H., 1983, A Constitutive Model and Data for Metals Subjected to Large Strains, High Strain Rates and High Temperatures, Proceedings 7th International Symposium on Ballistics, 21, 541–547.
| eISSN: | 2391-8071 |
| ISSN: | 1895-7595 |
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