Experiment?calculation comparison of the cutting conditions representative of the long fiber composite drilling phase

On the sharpness of straight edge blades in cutting soft solids: Part II – Analysis of blade geometry

“…In general, indentation studies have only been interested in the response of the indenter and substrate before cutting initiates [1][2][3][4][5][6][7][8][9], while cutting studies [10][11][12][13][14][15][16][17][18][19][20][21][22][23] have generally examined the long term response of the cutting process, where material separation or cutting reaches a steady state.…”

“…Where anisotropy existed in the substrate, a full three-dimensional analysis was employed [14]. On the other hand, the cutting tool or instrument has been modelled as both rigid [10,11,15,16] and/or deformable [12,[16][17][18][19][20].…”

“…In most of the cutting papers reviewed [10][11][12][13][14][15][16][17]19] the work piece or substrate material was modelled with deformable finite elements and most studies used a two dimensional finite element formulation [10-13, 15, 16, 19]. Where anisotropy existed in the substrate, a full three-dimensional analysis was employed [14].…”

“…However, very little information was given on the actual value of the coefficients of static and dynamic friction at the tool/substrate interface, with most researchers just estimating it. Many different approaches such as cohesive zone models [10], the CockroftLatham model [11], virtual crack extension method [14], fracture mechanics [14] and element deletion using a shear failure criterion [16] have been used to simulate material separation as the cutting commences. To solve the problem many different commercially available finite element codes, such as ABAQUS [10,16], DEFORM-2D [11,19], MARC [12,13,15], SAMCEF [14] and ANSYS [17,18] have been used, with no fundamental underpinning reason for the particular choice of code.…”

Influence of the Double Cone Drill Geometry on the Holes Quality during Drilling Multi-Stack Made of CFRP/Al

“…The damages are peel up delamination at the hole entry, thermal alteration, fibre pull-out and fuzzing on the wall of the hole, and exit delamination and uncut fibre at the hole exit [3]- [5]. Moreover, the mechanism of material removal in composite materials is strongly influenced by the relative angle between the direction of the cutting speed and the direction of fiber [6]. Sakuma et al [4] drilled holes using four drill materials and investigated drill wear pattern, flank wear width and cutting forces.…”