Quasistatic anisotropic induced behaviour of a tatb-based plastic-bonded explosive

被引：3
|
作者：
Plassart, Gaetane [1 ,2 ]
Picart, Didier [1 ]
Gratton, Michel [2 ]
Frachon, Arnaud [2 ]
Caliez, Michael [2 ]
机构：
[1] CEA DAM Le Ripault, F-37260 Monts, France
[2] Univ Tours, Univ Orleans, INSA Ctr Val de Loire, LaMe,EA 7494, F-41000 Blois, Loir & Cher, France
来源：
MECHANICS OF MATERIALS | 2022年 / 170卷
关键词：
Plastic-bonded explosives; Constitutive law; Quasistatic mechanical behaviour; Load-induced anisotropy; Non-linear kinematic hardening; anisotropic damage; Viscoelasticity; Viscoplasticity; VISCOELASTIC BEHAVIOR; DAMAGE MODELS; IMPLICIT; TENSION; LAW;
D O I：
10.1016/j.mechmat.2022.104318
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The constitutive law of a plastic-bonded explosive (PBX) based on TATB crystals is studied in the quasistatic loading range. The experimental data highlight a viscoelastic behaviour with damage, and an anisotropy induced by plastic flow. The existing models for PBXs being not appropriate, a constitutive law accounting for the observed mechanisms is proposed. The linear viscoelasticity is integrated in a microplane model describing an effective anisotropic damage. A multilayer viscoplasticity is used to yield a non-linear kinematic hardening. A von Mises yield criterion is defined on each surface and a dilatancy function describes the volumetric plastic yield. This law is implemented in the Abaqus/Standard finite element code in the form of a UMAT subroutine. The model is calibrated on ten tests. The simulations performed to compare the model to each experimental test correctly reproduce the behaviour of the studied explosive composition.
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页数：17
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