Thermomechanical analysis, modelling and simulation of the forming of pre-impregnated thermoplastics composites

Guzman-Maldonado, E.; Hamila, Nahiene; Boisse, Philippe; Bikard, Jérôme

doi:10.1016/j.compositesa.2015.08.017

Cited by 101 publications

(64 citation statements)

References 51 publications

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“…The characterization of the shear modulus and the bending stiffness is particularly challenging, especially due to their additional deflection and shear rate dependencies. There is no established method for the efficient characterization of these properties [8].…”

Section: Introductionmentioning

confidence: 99%

“…The draping over double curved geometries requires in-plane shear deformations [2,4] and as the shear stiffness increases with increasing shear angle, wrinkles start to form. The onset and development of wrinkle formation is a global phenomenon that depends on all of the stiffnesses of the material, however the size and shape of wrinkles is predominantly determined by the out-of-plane bending stiffness [2,4,5,[7][8][9]. Several studies [9,10] have demonstrated the importance of bending stiffness in the simulation of a forming process.…”

Section: Introductionmentioning

confidence: 99%

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A thermo-viscoelastic approach for the characterization and modeling of the bending behavior of thermoplastic composites

Ropers

Kardos

Osswald

2016

Composites Part A: Applied Science and Manufacturing

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Please cite this article as: Ropers, S., Kardos, M., Osswald, T.A., A thermo-viscoelastic approach for the characterization and modeling of the bending behavior of thermoplastic composites, Composites: Part A (2016), doi: http://dx. AbstractCurrently, there is no established and cost-effective method for the bending characterization of continuous fiber reinforced thermoplastic composites. Isothermal mechanical testing techniques are time and labor-intensive and deliver information only about distinct points of the temperature-dependent property curves. In this study, Dynamic Mechanical Analysis (DMA) as well as novel rheometer-based bending experiments were performed to assess temperature-dependent and viscoelastic behavior. On the basis of the experimental results a new method was defined and validated for the efficient characterization of temperature-dependent elastic bending behavior via DMA. Furthermore a linear viscoelastic material model was derived from DMA experiments by means of time-temperature superposition. As the material behavior proved to be of a highly viscoelastic nature, a method was developed to calibrate a material model, the parallel rheological framework, implemented in Abaqus.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A thermo-viscoelastic approach for the characterization and modeling of the bending behavior of thermoplastic composites

Ropers

Kardos

Osswald

2016

Composites Part A: Applied Science and Manufacturing

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“…Following [34], the gradient of a scalar β is a first order tensor. 1 The expression (30) for ij g differs from that of [33] because, in our case, r h = e n, where h depends on the coordinates p and q .…”

Section: Appendix Arbitrary Curvilinear Shell Descriptionmentioning

confidence: 97%

“…This is the case, for instance, of Plasfib [30], Aniform [31] or PAMForm [4]. In order to improve the physical description of these tools, accurate prediction of heat transfer is required.…”

Section: Proposed Integration In a Global Proceduresmentioning

confidence: 99%

On the Alternate Direction Implicit (ADI) Method for Solving Heat Transfer in Composite Stamping

Lévy¹,

Hoang²,

Corre³

2017

MSA

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Thermostamping of thermoplastic matrix composites is a process where a preheated blank is rapidly shaped in a cold matching mould. Predictive modelling of the main physical phenomena occurring in this process requires an accurate prediction of the temperature field. In this paper, a numerical method is proposed to simulate this heat transfer. The initial three-dimensional heat equation is handled using an additive decomposition, a thin shell assumption, and an operator splitting strategy. An adapted resolution algorithm is then presented. It results in an alternate direction implicit decomposition: the problem is solved successively as a 2D surface problem and several onedimensional through thickness problems. The strategy was fully validated versus a 3D calculation on a simple test case and the proposed strategy is shown to enable a tremendous calculation speed up. The limits of applicability of this method are investigated with two parametric studies, one on the thickness to width ratio and the other one on the effect of curvature. These conditions are usually fulfilled in industrial cases. Finally, even though the method was developed under linear assumption (constant material properties), the strategy validity is extended to multiply, temperature dependant (nonlinear) case using an industrial test case. Because of the standard methods involved, the proposed ADI method can readily be implemented in existing software.

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“…The curve of SCSK decreases sharply with the increase of temperature which suggests that the rigidity of SCSK is lower than that with SCA. 39 Curves in Figure 8(d) show a staged variety which reflects the change of softness. In Figure 8(b), SCSK-3%AMEO has better elasticity than that of SCSK-3%DAMO.…”

Section: Microstructurementioning

confidence: 99%

Effects of different silane coupling agents on structure and properties of starch–chitosan–kaolin composites

Zhang

Xing

et al. 2019

J of Applied Polymer Sci

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Effects of different silane coupling agents on clay surface modification were studied. Herein, functionalized superfine kaolin was compounded with starch-chitosan (SCS) to prepare starch-chitosan-functionalized superfine kaolin composite. The characterization results showed that kaolin (K) was successfully modified; the composite formed a dense intercalated structure. The glass-transition temperature (T g ) was measured by differential scanning calorimetry and dynamic mechanical analysis. It decreased by 60 C which attested the crystallinity of SCS. The results of thermogravimetric analysis showed that the fastest weight-loss temperature (T max ) was elevated by over 50 C for composites. Mechanical properties of the composites were explored by electronic universal testing machine. Tensile strength and elongation of composites were improved by 4.7 and 10.9 times.

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Thermomechanical analysis, modelling and simulation of the forming of pre-impregnated thermoplastics composites

Cited by 101 publications

References 51 publications

A thermo-viscoelastic approach for the characterization and modeling of the bending behavior of thermoplastic composites

A thermo-viscoelastic approach for the characterization and modeling of the bending behavior of thermoplastic composites

On the Alternate Direction Implicit (ADI) Method for Solving Heat Transfer in Composite Stamping

Effects of different silane coupling agents on structure and properties of starch–chitosan–kaolin composites

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