CAJ | 학술논문

提出了一种描述橡胶材料不同应变率下力学响应的黏超弹本构模型。首先，利用 Instron 实验机和 SHTB实验装置，开展橡胶材料单轴拉伸实验；其次，结合 Exp －ln 超弹性本构模型和广义黏弹性方法，建立了橡胶材料黏超弹本构模型；再次，推导本构模型三维增量格式，编写了用户子程序（VUMAT），验证了本构模型的一维和三维有效性；最后，建立橡胶底座冲击附加载荷计算数值模型，并将冲击附加载荷实验与数值仿真进行对比验证。结果表明：单轴拉伸实验与数值解吻合较好，冲击附加载荷实验值与仿真值误差约为7％，验证了黏超弹本构模型的正确性。
제출료일충묘술상효재료불동응변솔하역학향응적점초탄본구모형。수선，이용 Instron 실험궤화 SHTB실험장치，개전상효재료단축랍신실험；기차，결합 Exp －ln 초탄성본구모형화엄의점탄성방법，건립료상효재료점초탄본구모형；재차，추도본구모형삼유증량격식，편사료용호자정서（VUMAT），험증료본구모형적일유화삼유유효성；최후，건립상효저좌충격부가재하계산수치모형，병장충격부가재하실험여수치방진진행대비험증。결과표명：단축랍신실험여수치해문합교호，충격부가재하실험치여방진치오차약위7％，험증료점초탄본구모형적정학성。
A visco-hyperelastic constitutive model was proposed to describe mechanical responses of rubber material under different strain rates.Firstly,the uniaxial tensile tests for rubber material were conducted with Instron testing machines and SHTB testing devices.Secondly,combined with Exp-ln hyperelastic constitutive model and the generalized viscoelastic method,the visco-hyperelastic constitutive model for rubber material was built.Thirdly,the three-dimensional incremental format of the visco-hyperelastic constitutive model was deduced,the user subroutine VUMAT was written,the one-dimensional effectiveness and three-dimensional one were verified.Finally,the impact additional load numerical simulation model of a rubber base was established,the results of impact additional load tests were compared with those of the numerical simulation.The results showed that the numerical results agree well with the uniaxial tensile test data,the error between the impact additional load test value and the simulation one is approximately 7%,the correctness of the visco-hyperelastic constitutive model is verified.