A time-domain viscoelastic model of nonlinear compression behavior under cyclic loading

被引:0
|
作者
He, Jia-Xuan [1 ,2 ]
Xu, Zhao-Dong [1 ,2 ]
Li, Qiang-Qiang [3 ]
Hu, Zhong-Wei [1 ,2 ]
Wei, Ya-Xin [1 ,2 ]
Ge, Teng [4 ]
Dong, Yao-Rong [5 ]
Huang, Xing-Huai [1 ,2 ]
Milani, Gabriele [6 ]
机构
[1] Southeast Univ, Sch Civil Engn, Nanjing 210096, Peoples R China
[2] Southeast Univ, China Pakistan Belt & Rd Joint Lab Smart Disaster, Nanjing 210096, Peoples R China
[3] Xian Univ Technol, Sch Civil Engn & Architecture, Xian 710048, Peoples R China
[4] Hohai Univ, Sch Civil & Transportat Engn, Nanjing 210024, Peoples R China
[5] Xian Univ Architecture & Technol, Sch Civil Engn, Xian 710055, Peoples R China
[6] Politecn Milan, Dept Architecture Built Environm & Construct Engn, I-20133 Milan, Italy
基金
中国国家自然科学基金; 中国博士后科学基金;
关键词
Viscoelastic; Time-domain mechanical model; Nonlinear behavior; Large deformation; Frequency dependent; HYPERELASTIC CONSTITUTIVE MODEL; RUBBER-LIKE MATERIALS; NETWORK MODELS; ELASTICITY; DAMPERS; DAMAGE;
D O I
10.1016/j.ijengsci.2024.104200
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Viscoelastic (VE) pads, commonly employed as passive damping components in damping devices to absorb and dissipate energy, present challenges in predicting the mechanical behavior under large deformation due to significant nonlinearity. This study introduces a novel nonlinear timedomain model to accurately characterize the response of VE pads subjected to cyclic loading across small, moderate, and large compressive deformations. Effects such as strain hardening, the Mullins effect, continuous stress softening, and residual deformation are incorporated into the model. The proposed model integrates hyperelastic, viscoelastic, and elastoplastic parts, arranged in parallel, each addressing distinct aspects of the mechanical behavior. The hyperelastic part captures the time-independent response, in particular strain hardening in nonlinear stiffness. The VE part accounts for the frequency-dependent damping behavior, focusing on the initial unloading stiffness, the shape and area of the hysteresis loop, and major residual deformations. The elastoplastic part models the frequency-dependent plasticity, adjusting residual deformation and determining the extent of Mullins effect and continuous stress softening. Model parameters are determined through fitting procedures using uniaxial quasi-static and cyclic compression test data, allowing for an accurate description of the nonlinear mechanical behavior in the time domain. To assess the prediction capacity and applicability of the proposed model, the simulation results are comparatively evaluated by error analysis. The sensitivity analysis is further performed to investigate the influence of individual parameters. The proposed model demonstrates high accuracy and robustness in representing the mechanical behavior of VE pads across small, moderate, and large compressive deformations. The parameters in the hyperelastic, viscoelastic, and elastoplastic parts have accurate interpretations, providing distinct roles and contributions to the overall mechanical behavior.
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页数:20
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