Smart hydrogels are environmentally sensitive hydrogels, which can produce a sensitive response to external stimuli, and often exhibit the characteristics of multi filed coupling. In this paper, a hydrogel rod under c...Smart hydrogels are environmentally sensitive hydrogels, which can produce a sensitive response to external stimuli, and often exhibit the characteristics of multi filed coupling. In this paper, a hydrogel rod under chemomechanical coupling was analytically studied based on a poroelastical model. The already known constitutive and governing equations were simplified into the one dimensional case, then two different boundary conditions were considered. The expressions of concentration, displacement,chemical potential and stress related to time were obtained in a series form. Examples illustrate the interaction mechanism of chemical and mechanical effect. It was found that there was a balance state in the diffusion of concentration and the diffusion process could lead to the expansion or the stress change of the hydrogel rod.展开更多
Space masts are widely used in the aerospace engineering as one type of deployable space structures.In this paper,based on the stimuli-responsive effects of shape-memory polymers(SMPs),an intelligent mast with shape-m...Space masts are widely used in the aerospace engineering as one type of deployable space structures.In this paper,based on the stimuli-responsive effects of shape-memory polymers(SMPs),an intelligent mast with shape-memory function is studied.The thermos-mechanical constitutive model of SMPs is associated with the finite element(FE)software,and then the deployable deformation and shape-memory effect of the intelligent mast are investigated by the FE method.It is demonstrated that the mast can automatically deploy due to the shape recovery characteristics of SMPs.Furthermore,the effects of structure parametric of the mast and temperature are also investigated.The results can contribute to the design and application of novel SMP masts.展开更多
基金financial supports from the National Natural Science Foundation of China (Grants 11472020, 11502007, and 11632005)Hong Kong Scholars Program (Grant XJ2016021)
文摘Smart hydrogels are environmentally sensitive hydrogels, which can produce a sensitive response to external stimuli, and often exhibit the characteristics of multi filed coupling. In this paper, a hydrogel rod under chemomechanical coupling was analytically studied based on a poroelastical model. The already known constitutive and governing equations were simplified into the one dimensional case, then two different boundary conditions were considered. The expressions of concentration, displacement,chemical potential and stress related to time were obtained in a series form. Examples illustrate the interaction mechanism of chemical and mechanical effect. It was found that there was a balance state in the diffusion of concentration and the diffusion process could lead to the expansion or the stress change of the hydrogel rod.
基金supported by the National Natural Science Foundation of China[Project Number 11632005,11772012,and 11872079].
文摘Space masts are widely used in the aerospace engineering as one type of deployable space structures.In this paper,based on the stimuli-responsive effects of shape-memory polymers(SMPs),an intelligent mast with shape-memory function is studied.The thermos-mechanical constitutive model of SMPs is associated with the finite element(FE)software,and then the deployable deformation and shape-memory effect of the intelligent mast are investigated by the FE method.It is demonstrated that the mast can automatically deploy due to the shape recovery characteristics of SMPs.Furthermore,the effects of structure parametric of the mast and temperature are also investigated.The results can contribute to the design and application of novel SMP masts.
