Modelling and Microstructural Aspects of Ultra-Thin Sheet Metal Bundle Cutting

Abstract

The results of numerical simulations of the cutting process obtained by means of the finite element method were studied in this work. The physical model of a bundle consisting of ultra-thin metal sheets was elaborated and then submitted to numerical calculations using the computer system LS-DYNA. Experimental investigations rely on observation of metallographic specimens of the surfaces being cut under a scanning electron microscope. The experimental data showing the microstructure of an ultra-thin metal bundle were the basis for the verification of the numerical results. It was found that the fracture area consists of two distinct zones. Morphological features of the brittle and ductile zones were identified. There are distinct differences between the front and back sides of the knife. The experimental investigations are in good agreement with the simulation results.

Modelling of Guillotine Cutting of a Cold-Rolled Steel Sheet

“…The bilinear elastic–plastic material model of a sheet made of C75S (high-strength steel) was adopted for performing the numerical simulations and is presented in Figure 4. The details of the material properties for which the numerical calculations were performed are juxtaposed in Table 1 [2,12,13]. The assumed bilinear material model belongs to the simplest possible ones describing the nonlinear stress–strain behavior [39].…”

“…Many literature positions describe numerical or experimental investigations of machining processes, such as turning [5], milling [6,7,8], boring [9,10], grinding [11], etc. Much less attention is given to covering mechanical cutting on guillotines [12,13,14,15,16,17,18].…”

“…The crucial issue is designing new industrial machines [24], as well as the selection of an appropriate finite element model [25,26,27,28,29,30]. The cutting of a single sheet [12,14] is much simpler in comparison with the cutting of a bundle of plates [13].…”

“…A study of the cutting process by means of a non-symmetrical cutting tool was performed by Kaczmarczyk et al [12,13]. In those papers, investigations concerning the cutting of one [12] and two separated sheets [13] were discussed in detail. The cutting tool was modelled as a non-symmetrical rigid body and the plate was cut as a deformable one.…”

Meso-Scale Simulation of Concrete Based on Fracture and Interaction Behavior

“…The macro-mechanic response of concrete is the reflection of its meso-mechanical and micro-mechanic characteristics [2]. According to this idea, scholars have attempted to use finite element methods to research fractures in concrete, similar to the research of metal fractures [4]. Due to the advance of multi-processors' parallel processing capability, finite element simulation of composite material's meso-mechanical characteristics has progressed [5].…”