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摘要: 基于纤维增强复合材料连续介质力学理论及粘弹性理论,提出了猪后腿肌肉的率相关本构模型。 通过拟合以往研究中猪后腿肌肉的SHPB和SHTB实验应力应变曲线,确定了本构模型的相关参数。结果 表明:提出的本构模型既能描述猪后腿肌肉沿纤维方向的动态压缩力学性能又能描述其动态拉伸性能,理论 模型与实验模型有较好的一致性。该结果可为安全防护数值模拟提供一定的理论依据。Abstract: Basedonthecontinuum medium mechanicstheoryoffiberreinforcedcompositematerials andtheviscoelastictheory,arate-dependentconstitutivemodelwasproposedforporcineham muscle. Themodelparametersweregainedbyfittingtheconstitutiveequationstothestress-straincurves whichwereobtainedinthepreviousSHPBandSHTBtests.Theresultsexhibitthattheproposed modelcandescribethedynamiccompressiveandtensilemechanicalpropertiesofporcineham muscle alongthefiberdirection.Theconsistencybetweenthemodelandtheexperimentshowsthatthestudy cangiveatheoryfoundationforthenumericalsimulationofthesecurityprotectionsystems.
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Key words:
- solidmechanics /
- constitutivemodel /
- transverselyisotropic /
- muscle
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