Industrial thermoforming simulation of automotive fuel tanks

Wiesche, Stefan aus der

doi:10.1016/j.applthermaleng.2004.03.003

Cited by 29 publications

(13 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Exact material behavior is a key parameter for realistic simulations, and it was found that the accuracy of the simulation depends on the temperature dependency of material properties [11]. Therefore, temperature dependency must be incorporated into material models.…”

Section: Materials Modelmentioning

confidence: 99%

“…The experimental setup was built to determining the thermal contact conductance between mating surfaces. Aus Der Wiesche [11] simulated the thermoforming process used to produce an automobile fuel tank. They have predicted the wall thickness distribution of the automobile fuel tank by incorporating both the structural and thermal aspect in the numerical simulation.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Thermal Analysis of The Heating Stage of the Thermoforming Process

Mishra

2019

IJRTE

View full text Add to dashboard Cite

Thermoforming is one of the most utilized polymer processing technique, where heated sheet polymer sheets are transformed into useful products. These sheets are usually deformed at a temperature higher than the glass transition temperature of the polymer sheet. The physical and mechanical properties of the sheet change significantly at this temperature. Therefore, forming temperature is the key parameter governing the process output, and by monitoring it, process parameter can be decided for higher quality output and minimum rejections. Temperature monitoring usually carried out using sensors and thermal imaging system, which demands open access of the surfaces to be monitor. In the case of closed forming setups use temperature, monitoring devices are favorable. In order to cope with the mentioned scenario present study proposed to use finite element analysis for temperature monitoring. The objective of the present study is to investigate the heating stage of the thermoforming process for Poly methyl methacrylate (PMMA) sheet just prior to deformation carried out in close forming setup. Numerical studies were performed to study the temperature distribution across the sheet during its heating. In order to validate the proposed numerical model, experimental investigations were carried out, and good agreement was found between simulated and experimental result. The results obtained from the present study could be useful to determine the required process parameters such as deformation pressure. Moreover, the heating stage could be optimized to reduce energy consumption and cycle time.

show abstract

Section: Materials Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermal Analysis of The Heating Stage of the Thermoforming Process

Mishra

2019

IJRTE

View full text Add to dashboard Cite

show abstract

“…The amount of sheet sag using isothermal theory was 14 times larger than nonisothermal condition. Wiesche [14] examined thermoforming processes using numerical simulation for an industrial fuel tank, which has complex geometry. The effect of temperature-dependent properties on thickness distribution was investigated.…”

Section: Introductionmentioning

confidence: 99%

Experimental determination of the viscoelastic parameters of K-BKZ model and the influence of temperature field on the thickness distribution of ABS thermoforming

Cha

Kim

Park

et al. 2019

Int J Adv Manuf Technol

View full text Add to dashboard Cite

This study investigated an influence of the temperature field on thickness distribution of thermoformed products using complex and high-aspect-ratio mold. The optimum temperature field was obtained to achieve a more uniform thickness distribution in the thermoformed products by using finite element simulation. The material properties of acrylonitrile-butadiene-styrene (ABS) polymer sheet were obtained by two rheological measurement tests. The linear viscoelastic properties, such as the storage modulus and loss modulus, were measured by a small amplitude oscillatory shear (SAOS) test for wide ranges of frequency and temperature. The discrete relaxation time and discrete relaxation modulus were obtained by nonlinear regression. The fitting parameters C 1 and C 2 for the WLF model were obtained by curve fitting. The nonlinear viscoelastic property, such as stress relaxation modulus, was measured by a step strain test. The damping function and fitting parameter α of Wagner-Demarmels (WD) model were determined by curve fitting. Then, the Kaye-Bernstein-Kearsley-Zapas (K-BKZ) constitutive equation was utilized to the thermoforming simulation in order to investigate the material behavior of the polymer sheet. The numerical results showed that a more uniform thickness distribution could be achieved with the optimum temperature field of the sheet. The thinnest part of the products was improved by more than 30%.

show abstract

“…Due to the low cost of the tools and the short development times, the standard thermoforming process tends to be extended to technical parts with large dimensions in many industrial areas (yachting, sanitary, automobile,…) [1]. This extension needs to adapt thermoforming to thick sheets (> 2 mm) to product parts with complex geometries involving high deformation rate [2,3]. One of the main difficulties relies in the control of the final thickness distribution [4].…”

Section: Introductionmentioning

confidence: 99%

Prediction of thickness distribution of thermoformed multilayer ABS/PMMA sheets

Jobey¹,

Allanic²,

Mousseau³

et al. 2016

AIP Conference Proceedings

View full text Add to dashboard Cite

In thermoforming, one of the main difficulties is to avoid the presence of weak thickness in the most deformed zones. After the heating stage, a bubbling step, leading to a first rate of deformation, is often used. In this work, we assess how the initial bubbling deformation can be controlled in order to obtain a homogeneous final thickness of the product. Experiments are performed on a multilayer sheet product. An industrial mould, corresponding to a casing of a nonlicensed car, was adapted on a lab thermoformer. After presenting experimental thermal profiles of the multilayer sheets measured during the heating stage, a first geometric model is investigated to predict the thickness distribution. Numerical results are compared with measurements.

show abstract

Industrial thermoforming simulation of automotive fuel tanks

Cited by 29 publications

References 21 publications

Thermal Analysis of The Heating Stage of the Thermoforming Process

Thermal Analysis of The Heating Stage of the Thermoforming Process

Experimental determination of the viscoelastic parameters of K-BKZ model and the influence of temperature field on the thickness distribution of ABS thermoforming

Prediction of thickness distribution of thermoformed multilayer ABS/PMMA sheets

Contact Info

Product

Resources

About