SPH-Simulation of the Fiber-reinforced Composite Workpiece Cutting for the Surface Quality Improvement

Modeling of the interface delamination process when machining hybrid multi-material assemblies

“…No separation zone is used in the JC damage model and therefore only one fracture energy is defined for the whole titanium phase. In fact, a separation zone is used to simplify the numerical analysis [24,26,36]. As for the cohesive bonding surface, a small thickness of the cohesive element (5 µm) was used.…”

“…A direct relationship should be noted between the fracture energy, the chip morphology, and the cutting forces. It can be noticed that fragmented, segmented, or continuous chips can be obtained for three energy levels: low (<20), medium (20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30)(31)(32)(33)(34)(35) or high (>40) respectively. The cutting forces increase with increased fracture energy.…”

“…Pramanik et al [23] reported that rupture is generated due to debonding of particles (case of glass-fiber and matrix debonding) in front of the tool. Whereas Shchurov et al [24] argued that the main reason for this fact is the high strength of fibers in comparison with the matrix one. To understand this physics in detail, it is more reasonable to focus on the damage mechanism of a composite part in the assembly.…”

Effect of Different Cutting Depths to the Cutting Forces and Machining Quality of CFRP Parts in Orthogonal Cutting: A Numerical and Experimental Comparison

“…The quality of machined surface relies on many surface parameters. [Pramanik et al, 2007] mentioned that newly generated surfaces remain under residual compressive stress and these surfaces are damaged due to cavities left by the pullout of fibers; whereas [Shchurov et al, 2016] said it is the interfacial debonding between fibers and matrix in the area under machined surface which is responsible. In this paper the surface roughness has been analyzed from experimental results following a numerical and experimental crack generation and propagation comparison.…”

“…Since the machined surface quality and subsurface damage have been known to be highly dependent on many process parameters, there have been many previous studies focused separately on the effect of fiber position, cutting speed, rake angle on the surface quality, eg: [Blanchet, 2015] [Iliescu, 2008] [Shchurov et al, 2016] [Arola et al, 1996] [Arola et al, 2002] [Alaiji et al, 2015] [Wang and Zhang, 2003]. Different failure models, Hashin, Maximum stress and Hoffman criterion have been used by [Lasri et al, 2009] focusing on progressive failure of unidirectional glass fiber-reinforced polymer composite (FRP).…”