动力学-3.pdf

节选段落一：
In an isotropic, elastic material the effective Lamé's constants can be defined in terms of Young's modulus, E,
and Poisson's ratio, , by
Δt ≈ ,
Lmin
cd
Lmin cd
λ0 μ0
Δt
1/√2 1/√3
cd
λ̂
Ĝ = 2μ̂ Δp ΔS
Δϵvol Δe
Δp = (3λ̂+ 2μ̂)Δϵvol,
ΔS = 2μ̂Δe .
3K̂ = 3λ̂+ 2μ̂ = ,
Δp
Δϵvol
2μ̂ = ,
ΔS : Δe
Δe : Δe
λ̂+


节选段落二：
2μ̂ = (3K̂ + 4μ̂) .
1
3
cd =√ ,λ̂+ 2μ̂
ρ
ρ
ν
λ̂ = λ0 =
Eν
(1 + ν) (1 − 2ν)
Page 3 of 13Explicit dynamic analysis
2021/7/25file:///E:/ABAQUS/help/SIMULIA2017doc/English/SIMACAEANLRefMap/simaanl-...
and
Time incrementation
The time increment used in an analysis must be smaller than the stability limit