Találati lista | Tudóstér

001-es BibID:	BIBFORM099887
035-os BibID:	(cikkazonosító)1057 (Scopus)85123110884 (WOS)000754950800001
Első szerző:	File Máté
Cím:	Optical Investigation of the Limits of Modeling the Nonlinear Elastic Behavior of PA6 Using Linear Elastic Material Models / Máté File, Tamás Mankovits, Dávid Huri
Dátum:	2022
ISSN:	2076-3417
Megjegyzések:	Featured Application In the design of engineering polymeric products, the detailed finite element investigation is indispensable. In most cases, polymeric products are investigated with multilinear material models over the entire stress-strain range. The definition of these material models requires material parameters, which must be obtained through time and cost demanding laboratory measurements. For some applications, such as quasi-static loading, it would be sufficient to use a linear elastic material model, the material constants of which can be obtained quickly. This article can help designers to apply the right material model as the linear elastic material model can be used until the 0.96% strain value in the case of the PA6 material with sufficient accuracy. One of the most critical issues during polymer finite element simulations is the selection of the proper material models. The widely used and accepted multilinear material models require load case-specific material tests, which are time and cost demanding. Data for these characteristics must be acquired by standardized measurements. On the other hand, the parameters required to create a linear elastic material model in most cases are easy to obtain, and the establishment of the model is a shorter process. This research is aimed to provide information to engineers about the possibility of modeling the nonlinear elastic materials by using linear elastic material models and about the limits of such models. To create the most accurate material models, laboratory measurements were performed on polyamide (PA6) material, which is a widely used raw material in the industry. Test specimens were manufactured to obtain material constants according to the ISO 527-2 standard, and for validating the effectiveness of the applied material models, three different tensile specimens were created, which were tested under quasi-static loading in the elastic region. A comprehensive finite element investigation was performed, and the numerical results were then compared to laboratory measurements using the GOM Aramis digital image correlation (DIC) system. By comparing the optically measured strain data to the numerical results, it was determined that the nonlinear elastic materials can be modeled using linear elastic models in a well identifiable strain range with sufficient accuracy.
Tárgyszavak:	Műszaki tudományok Anyagtudományok és technológiák idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk polyamide 6 finite element analysis digital image correlation material model fitting
Megjelenés:	Applied Sciences-Basel. - 12 : 3 (2022), p. 1-16. -
További szerzők:	Mankovits Tamás (1981-) (gépészmérnök) Huri Dávid (1990-) (gépészmérnök)
Internet cím:	DOI Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Saját polcon:

001-es BibID:	BIBFORM102153
035-os BibID:	(Scopus)85131553351 (cikkazonosító)5451 (WOS)000809194500001
Első szerző:	Huri Dávid (gépészmérnök)
Cím:	Surrogate Model-Based Parameter Tuning of Simulated Annealing Algorithm for the Shape Optimization of Automotive Rubber Bumpers / Dávid Huri, Tamás Mankovits
Dátum:	2022
ISSN:	2076-3417
Megjegyzések:	Featured Application The developed surrogate model-based parameter tuning method of the simulated annealing algorithm is suitable for solving not only numerical simulation optimization problems but also other computationally intensive model-driven optimizations. A design engineer has to deal with increasingly complex design tasks on a daily basis, for which the available design time is shrinking. Market competitiveness can be improved by using optimization if the design process can be automated. If there is limited information about the behavior of the objective function, global search methods such as simulated annealing (SA) should be used. This algorithm requires the selection of a number of parameters based on the task. A procedure for reducing the time spent on tuning the SA algorithm for computationally expensive, simulation-driven optimization tasks was developed. The applicability of the method was demonstrated by solving a shape optimization problem of a rubber bumper built into air spring structures of lorries. Due to the time-consuming objective function call, a support vector regression (SVR) surrogate model was used to test the performance of the optimization algorithm. To perform the SVR training, samples were taken using the maximin Latin hypercube design. The SA algorithm with an adaptive search space and different cooling schedules was implemented. Subsequently, the SA parameters were fine-tuned using the trained SVR surrogate model. An optimal design was found using the adapted SA algorithm with negligible error from a technical aspect.
Tárgyszavak:	Műszaki tudományok Anyagtudományok és technológiák idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk finite element analysis hyperelastic material model support vector regression engineering optimization simulated annealing parameter tuning
Megjelenés:	Applied Sciences-Basel. - 12 : 11 (2022), p. 1-22. -
További szerzők:	Mankovits Tamás (1981-) (gépészmérnök)
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Saját polcon:

001-es BibID:	BIBFORM085890
035-os BibID:	(cikkazonosító)3584 (WOS)000541440000245 (Scopus)85085608229
Első szerző:	Huri Dávid (gépészmérnök)
Cím:	Parameter Selection of Local Search Algorithm for Design Optimization of Automotive Rubber Bumper / Dávid Huri, Tamás Mankovits
Dátum:	2020
ISSN:	2076-3417
Tárgyszavak:	Műszaki tudományok Anyagtudományok és technológiák idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk
Megjelenés:	Applied Sciences-Basel. - 10 : 10 (2020), p. 1-16. -
További szerzők:	Mankovits Tamás (1981-) (gépészmérnök)
Internet cím:	DOI Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Saját polcon: