Sensitivity Analysis of the Influence of Dynamic Material Parameters on the Blanking Process and Quality of the Cut

• Autorzy: Bohdal Ł. , Kukiełka L.
• Konferencja: French-Polish Seminar of Mechanics (18 ; 31.05.2010 ; Warsaw, Poland)
• Języki publikacji: EN

Abstrakty

EN

The sensitivity analysis of the influence of dynamic material parameters on the blanking process and quality of the cut was done in Ansys/LS-Dyna program with using explicit method. To describe the properties of sheet-plate being cut, the Cowper-Symonds' equation was used. A Cowper-Symonds' model allows for linear-isotropic, kinematic or mixed plastic strain hardening and the effect of the intensity of plastic strain velocity. The influence of Cowper-Symonds' model parametr's C and P (the material parameters defining the effect of intensity of plastic strain rate) at state of stresses and strains in steel element blanking was presented. Huber-Mises-Hencky's yield criterion and the associated law of material flow was utilised in materials model, described incremental components of Pioli-Kirchhoff s stress tensor and Green-Lagrange's strain tensor. The formation of rollover, burnished, smooth surface, burr and crack initiation and propagation at the shearing region were simulated. For the description of the non-linear phenomena, at the typical increment ratio, the updated Lagrange's description was used. Nonlinearity of the material was described by means of the increment model taking into consideration the deformation and deformation rate records. The condition of the material after pre-machining processes was also taken into account by means of implementation of initial conditions of: displacement, stress, strain and strain rate. The mathematical model was completed by incremental movement equations as well as uniqueness conditions.

Słowa kluczowe

EN

sensitivity analysis; dynamic parameters; blanking process; ANSYS; LS-DYNA; cutting process

• Wydawca: Oficyna Wydawnicza Politechniki Warszawskiej
• Czasopismo: Machine Dynamics Research
• Rocznik: 2010
• Tom: Vol. 34, No. 2
• Strony: 14--20
• Opis fizyczny: Bibliogr. 4 poz., wykr.

Twórcy

autor

Bohdal Ł.

autor

Kukiełka L.

• Koszalin University of Technology. Faculty of Mechanical Engineering, Department of Technological Mechanics and Mechanics of Materials,

Bibliografia

• Erbel, S., Kuczyński, K., Marciniak, Z., 1981, Plastic working, Warsaw (in polish).
• Marciniak, Z., 1994, Punch construction, WNT Warsaw (in polish).
• Polański, Z., 1978, Blanking, WNT Warsaw (in polish).
• Bohdal, Ł., 2009, The modelling and numerical analysis of the cutting process with the regard of the geometrical and physical nonlinearity, PhD dissertation, Technical University of Koszalin (in polish).