Advances in Civil Engineering

Research Article

Numerical Simulation Research on Cutting Rock with a PDC Cutter Assisted by an Impact Force

Table 1

Parameters of the finite element model.


Parameter/unit	Value

A	0.79
B	1.6
N	0.61
C	0.007
f_c^’/GPa	0.048
S_max	7
D₁	0.04
D₂	1
EF_min	0.01
P_crush/GPa	0.016
μ_crush	0.001
K₁/GPa	85
K₂/GPa	−171
K₃/GPa	208
μ_lock	0.1
P_lock/GPa	0.8
T/GPa	0.004
G/GPa	14.86
ρ/kg/m³	2440
J/Kg·K	654

A: standard viscosity coefficient; B: standard pressure hardening coefficient; N: pressure hardening index; C: strain rate coefficient; f_c′: quasi-static uniaxial compressive strength; Smax: the upper limit of standard equivalent stress; D₁: constant; D₂: constant; EF_min: plastic strain limit of material failure; P_crush: stress in the uniaxial compression stress experiment; μ_crush: volume strain in the uniaxial compression stress experiment; K₁, K₂, and K₃: material constant without porosity; μ_lock: locked volume strain rate; P_lock: locked stress; T: the maximum hydrostatic pressure that the material can withstand; G: the shear modulus; ρ: density of rock; and J: specific heat capacity.