Solid‐shell formulations based on reduced integration – investigations of anisotropic material behaviour at large deformations

PAMM ◽  
2018 ◽  
Vol 18 (1) ◽  
Author(s):  
Oliver Barfusz ◽  
Randy Smeenk ◽  
Stefanie Reese
Keyword(s):  
Anisotropic Material ◽  
Large Deformations ◽  
Solid Shell ◽  
Material Behaviour ◽  
Reduced Integration

scholarly journals Theoretical description of large deformations in criss-cross composites (with application to Tensylon®)

2020 ◽  
Vol 23 (2) ◽  
pp. 269-281
Author(s):  
Pavel S. Mostovykh
Keyword(s):  
Theoretical Model ◽  
Anisotropic Material ◽  
Large Deformations ◽  
Theoretical Description ◽  
Elastic Behaviour ◽  
Large Strains ◽  
Experi Mental Data ◽  
Deforma Tion

A theoretical model of an anisotropic material, Tensylon®, under large strains is proposed. This model is capable to describe the material’s response in in-plane tension at different angles to the fibrils. At 0° and at 90°, i.e., along the fibrils in either “criss” or “cross” plies, it quantitatively predicts the experimentally observed elastic behaviour until failure. At 45° to the fibrils, it quantitatively describes the experi- mental data in the elastic and plastic domains. The description remains accurate up to strains of 35%, that corresponds to 30÷40% of deforma- tion gradient components. The infinitesimal strains model would give at least 25% of error under such circumstances.

Considering Anisotropic Material Behaviour of Sheet Metals for Ductile Fracture Prediction

2014 ◽  
Vol 1018 ◽  
pp. 229-236
Author(s):  
Andreas Sabathil ◽  
Ingo Heinle ◽  
Arnulf Lipp ◽  
Josef Meinhardt ◽  
Marion Merklein
Keyword(s):  
Ductile Fracture ◽  
Anisotropic Material ◽  
Isotropic Material ◽  
Fracture Prediction ◽  
Model Parameters ◽  
Suitable Model ◽  
Sheet Metals ◽  
Material Behaviour ◽  
Fracture Models ◽  
Body In White

In the manufacturing process of body in white components made from sheet metal it is state of the art to accompany the process by means of finite element analysis. A main criterion for determining a feasible tool design and process parameters is the prediction of material failure, which can be categorized in instability and ductile fracture. The ductile fracture failure mode is more likely to occur, as more advanced high strength steels and aluminium alloys are used for body in white components. Therefore various approaches have been presented to model ductile fracture over the past years. However, there is no guideline to determine which models are suitable for predicting ductile fracture. The same applies when it comes to choosing experiments and calibration of model parameters. A suitable model calibration is vital, as the fracture prediction depends on the determined model parameters. Usually an isotropic material behaviour is assumed for calibration of fracture models. However, sheet metals can show an anisotropic material behaviour due to the rolling process. Therefore it is arguable if an isotropic material model can be applied when fracture models are calibrated.

A reduced integration-based solid-shell finite element formulation for gradient-extended damage

2021 ◽  
Vol 382 ◽  
pp. 113884
Author(s):  
Oliver Barfusz ◽  
Tim van der Velden ◽  
Tim Brepols ◽  
Hagen Holthusen ◽  
Stefanie Reese
Keyword(s):  
Finite Element ◽  
Finite Element Formulation ◽  
Element Formulation ◽  
Solid Shell ◽  
Reduced Integration ◽  
Shell Finite Element
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