<strong>AlSi10Mg</strong>多孔结构在不同加载应变率下的损伤模式及响应机制

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AlSi10Mg多孔结构在不同加载应变率下的损伤模式及响应机制

蔡宣明, 张伟, 范志强, 高玉波, 王俊元, 张柱军

Damage Modes and Response Mechanisms of AlSi10Mg Porous Structures Under Different Loading Strain Rates

CAI Xuanming, ZHANG Wei, FAN Zhiqiang, GAO Yubo, WANG Junyuan, ZHANG Zhujun

表1 Johnson-Cook本构模型和断裂准则相关参数

Table 1 Correlation parameters of the Johnson-Cook principal model and fracture criterion

Parameter	Symbol	Value	Unit
Yield strength parameter	M	331.17	MPa
Model parameter	B	576.65	MPa
Strain rate sensitive parameter	C	0.032
Hardening index	n	0.99
Temperature softening parameter	m	0.945
Reference strain rate	${\dot{ε}}_{0}$	1	s^-1
Reference temperature	T_r	298	K
Melting point temperature	T_m	843	K
Material model parameter	D₁	0.04704
	D₂	1.155
	D₃	-0.841
	D₄	-0.042
	D₅	0
Material density	ρ	2700	kg·m^-3
Elastic modulus	E	75	GPa
Poisson's ratio	ν	0.3