Analysis of polymer crystallization and residual stresses in injection molded parts

Spina, Roberto; Spekowius, Marcel; Dahlmann, Rainer; Hopmann, Christian

doi:10.1007/s12541-013-0309-2

Cited by 30 publications

(14 citation statements)

References 23 publications

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“…The two types of ADC present different DSC curves. The peaks of the first run are the decomposition steps of ADC in which solids (urazol and hydrazodicarbonamide) and a gaseous mixture of nitrogen, carbon monoxide, cyanic acid and ammonia occur, in agreement with Bhatti et al [20]. Approximately 200-210 ml of gas mixture is released per gram of ADC.…”

Section: Dsc Analysessupporting

confidence: 81%

Technological characterization of PE/EVA blends for foam injection molding

Spina

2015

Materials & Design

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Section: Dsc Analysessupporting

confidence: 81%

Technological characterization of PE/EVA blends for foam injection molding

Spina

2015

Materials & Design

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“…Because the nucleation of semicrystalline polymers is typically heterogeneous, it is difficult to apply the theoretical models of the nucleation [4]. As a result, empirical approaches are adopted to solve this problem and nucleation laws are presented to represent the empirical relations between the nucleus density and the temperature.…”

Section: Nucleationmentioning

confidence: 99%

“…To date, a number of investigators are interested in predicting the morphological development of polymer crystallization and many research studies have been carried out on this topic [2][3][4][5][6][7][8][9][10][11][12]. In order to obtain the internal microstructure of polymer products, different approaches have been proposed for morphological modeling of polymer crystallization by researchers [7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Simulation of Polymer Crystallization under Isothermal and Temperature Gradient Conditions Using Particle Level Set Method

et al. 2016

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Morphological models for polymer crystallization under isothermal and temperature gradient conditions with a particle level set method are proposed. In these models, the particle level set method is used to improve the accuracy in studying crystal interaction. The predicted development of crystallinity during crystallization under quiescent isothermal condition by our model is reanalyzed with the Avrami model, and good agreement between the predicted and theoretical values is observed. In the temperature gradient, the computer simulation results with our model are consistent with the experiment results in the literature.

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“…Furthermore, the authors wish to thank Professor Luigi Tricarico of DMMM (Politecnico di Bari) and Nikolai Borchmann of IKV (RWTH Aachen) for their precious support during the research activities. 9 2.12 · 10 -3 1/bar [27] PVT, pressure, specific volume, temperature. The data was obtained by parameter fitting to experimental data from Lamberti [20] and Janeschitz-Kriegl [2] .…”

Section: Resultsmentioning

confidence: 99%

Mesoscale simulation of the solidification process in injection moulded parts

Spekowius

Hopmann

2015

Journal of Polymer Engineering

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Abstract Due to their wide range of applications and their complex material properties, it is desirable to be able to predict the behaviour of injection moulded parts with the help of simulation tools. For semi-crystalline materials, this can only take place with considerable accuracy if the inhomogeneous material properties are taken into account. Because of this, it is necessary to calculate the microstructure of the solidified melt and to incorporate these findings in the simulation. We present an integrative, multiscale simulation approach in which the manufacturing process is calculated on a macroscale and the solidification process on a mesoscale. A multiphase filling and cooling simulation is done to calculate temperature and velocity fields, which are used as boundary conditions for the calculation of the spherulite distribution in the part. We present the used nucleation and growth model and shortly describe the parallelisation approach of the mesoscale simulation.

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Analysis of polymer crystallization and residual stresses in injection molded parts

Cited by 30 publications

References 23 publications

Technological characterization of PE/EVA blends for foam injection molding

Technological characterization of PE/EVA blends for foam injection molding

Simulation of Polymer Crystallization under Isothermal and Temperature Gradient Conditions Using Particle Level Set Method

Mesoscale simulation of the solidification process in injection moulded parts

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