曲绍兴
博士 教授 博士生导师
浙江大学 航空航天学院
智能软材料与软机器、复合材料力学、微纳米力学。
个性化签名
- 姓名:曲绍兴
- 目前身份:在职研究人员
- 担任导师情况:博士生导师
- 学位:博士
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学术头衔:
博士生导师
- 职称:高级-教授
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学科领域:
固体力学
- 研究兴趣:智能软材料与软机器、复合材料力学、微纳米力学。
曲绍兴,山东莱州人,1974年1月出生,国家杰出青年科学基金获得者,任中国力学学会副理事长、教育部高等学校教学指导委员会力学类专业教指委委员、浙江大学航空航天学院副院长、浙江省软体机器人与智能器件研究重点实验室主任、浙江省软机器与柔性电子国际科技合作基地主任、浙江大学-中国空间技术研究院智能材料与柔性电子技术联合实验室主任。
1992-1997年在中国科学技术大学攻读理论与应用力学学士学位,1997-2000年在清华大学攻读固体力学硕士学位,2000-2004年在美国伊利诺依大学香槟分校(UIUC)攻读机械工程博士学位,2004-2006年在美国布朗大学进行博士后研究,2006年9月份回国到浙江大学工作,2008年9月至2009年6月在美国哈佛大学访问研究。
主要研究方向为智柔体、复合材料力学、微纳米力学。发表SCI学术论文160余篇;获国家发明专利8项。担任Proceedings of the Royal Society A 编委、International Journal of Fracture编委、International Journal of Computational Materials Science and Engineering编委、Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)编委、Mechanics of Soft Materials编委、《固体力学学报英文版》编委、《力学进展》编委、《机器人》青年编委。
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成果数
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【期刊论文】3D printing of highly stretchable hydrogel with diverse UV curable polymers
Science Advances,2021,7(2):eaba4261
2021年01月06日
Hydrogel-polymer hybrids have been widely used for various applications such as biomedical devices and flexible electronics. However, the current technologies constrain the geometries of hydrogel-polymer hybrid to laminates consisting of hydrogel with silicone rubbers. This greatly limits functionality and performance of hydrogel-polymer–based devices and machines. Here, we report a simple yet versatile multimaterial 3D printing approach to fabricate complex hybrid 3D structures consisting of highly stretchable and high–water content acrylamide-PEGDA (AP) hydrogels covalently bonded with diverse UV curable polymers. The hybrid structures are printed on a self-built DLP-based multimaterial 3D printer. We realize covalent bonding between AP hydrogel and other polymers through incomplete polymerization of AP hydrogel initiated by the water-soluble photoinitiator TPO nanoparticles. We demonstrate a few applications taking advantage of this approach. The proposed approach paves a new way to realize multifunctional soft devices and machines by bonding hydrogel with other polymers in 3D forms.
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【期刊论文】Functional hydrogel coatings
National Science Review,2020,8(2):nwaa254
2020年10月05日
Hydrogels—natural or synthetic polymer networks that swell in water—can be made mechanically, chemically and electrically compatible with living tissues. There has been intense research and development of hydrogels for medical applications since the invention of hydrogel contact lenses in 1960. More recently, functional hydrogel coatings with controlled thickness and tough adhesion have been achieved on various substrates. Hydrogel-coated substrates combine the advantages of hydrogels, such as lubricity, biocompatibility and anti-biofouling properties, with the advantages of substrates, such as stiffness, toughness and strength. In this review, we focus on three aspects of functional hydrogel coatings: (i) applications and functions enabled by hydrogel coatings, (ii) methods of coating various substrates with different functional hydrogels with tough adhesion, and (iii) tests to evaluate the adhesion between functional hydrogel coatings and substrates. Conclusions and outlook are given at the end of this review.
hydrogel coatings,, coating methods,, coating tests,, adhesion,, hydrogel applications
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【期刊论文】Micromechanical modeling of the multi-axial deformation behavior in double network hydrogels
International Journal of Plasticity,2021,137():102901
2021年02月01日
The Mullins-type damage behaviors in double network hydrogels have attracted a broad research interest in recent years. However, most of current works focus on characterizing and modeling the uniaxial deformation behaviors of these materials. In this work, we combine experimental and theoretical approaches to investigate the anisotropic damage behaviors of double network hydrogels revealed in multi-axial deformation conditions. We demonstrate that an isotropic damage model based on the eight-chain model and the network alteration theory fails to capture the stress response in multi-axial loading tests. An anisotropic damage theory based on the microsphere model has also been developed, while both the affine and non-affine approaches are adopted to obtain the micro-macro mapping. The results show that the affine microsphere model cannot describe the experimental results in pure shear and unequal biaxial tests. Remarkably, the non-affine microsphere model with three parameters captures all the important features of the experimental observations. This is because the non-affine model accurately predicts the directional damage of the primary cross-linked network. The non-affine microsphere model is also able to describe the damage cross-effect in double network hydrogels. The developed theoretical framework can promote the fundamental understanding of the anisotropic damage behaviors in various types of tough gels.
Double network hydrogel Mullins effect Microsphere model Anisotropic damage
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Advanced Engineering Materials,2020,22(12):2000640
2020年08月27日
The soft actuators similar to the periodic motion of biological organisms are accomplished based on assembling multiple unidirectional memory effect shape memory alloys (SMAs) components or introducing biasing elements, which give rise to the complex structure and difficult control of soft actuators. Herein, inspired by the power‐amplified biological systems, beneficial with the advantages of 3D integrated molding technology, an integrated SMA‐polydimethylsiloxane (PDMS) composite structure (SPCS) is proposed, which can achieve periodic heterogeneous actuation only by controlling the SMA phase transformation and the PDMS strain potential energy distribution states. To test the feasibility of the mechanism, a theoretical model of SPCS deformation is conducted. The results of numerical feasibility analysis show that the factors affecting SPCS deformation mainly involve the excitation current strength of SMA, PDMS structure thickness and its distribution state. The experimental results show that the current intensity mainly affects the deformation rate of SPCS, and the thickness of PDMS is not only the key to realize the periodic deformation of SPCS but also the orderly arrangement of PDMS structure thickness is helpful for SPCS to achieve periodic heterogeneous deformation. These demonstrate that the proposed mechanism can inspire the design of soft actuators, smart wearable equipment, and medical devices.
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Geotextiles and Geomembranes,2020,48(5):724-734
2020年10月01日
The basic pore unit model is extended to predict the strained pore size characteristics of woven slit-film geotextiles subjected to unequal biaxial tensile strains. The strained per cent open area (POA) and analytical pore size are expressed as functions of the weft strain and the warp strain to weft strain ratio. The influence of the biaxial tensile strain on pore size characteristics is evaluated in three woven slit-film polypropylene geotextile samples using image analysis under the warp strain to weft strain ratios of 1, 2, 3 and 4. It is shown that the experimental POA and O95 increased significantly with increasing strain at different warp strain to weft strain ratios, and the PSD curves moved toward the direction of large open sizes. The analytical models of POA and pore size can accurately predict the increasing trend of POA and O95. Moreover, unequal biaxial tensile strains can significantly change the shape of the pores, which may influence the results of the pore size obtained by indirect methods. A larger warp strain to weft strain ratio can lead to a larger change in the pore shape when the length to width ratios of initial pores are close to 1.
Geosynthetics Pore size characteristic Unequal biaxial tensile strain Analytical model Pore shape Image analysis
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Mechanics of Materials,2020,150():103575
2020年11月01日
An electro-mechanically coupled visco-hyperelastic-plastic constitutive model is established in this work to describe the cyclic deformation of dielectric elastomers (DEs) by addressing the significant ratchetting and cyclic stress-softening behaviors of DEs resulting from the coupled visco-hyperelasticity, plasticity and electro-mechanical effects. First, a visco-hyperelastic-plastic constitutive model is constructed in the framework of large deformation to incorporate the visco-hyperelasticity and plasticity of DEs, simultaneously. The typical Ogden's formulation is employed for the description of basic hyperelastic response; multiple relaxation mechanisms are adopted to capture the time-dependent viscoelastic part; and a finite plastic flow rule based on the arc-length description is proposed to describe the plastic one. Then, within the framework of nonlinear electro-mechanically coupling approach and by assuming quasi-linear dielectric behavior, the visco-hyperelastic-plastic constitutive model is extended to an electro-mechanically coupled one. Finally, the proposed models are, respectively, validated by comparing the predicted results with corresponding experimental ones of VHB™4910 DE. It is found that the pure mechanical and electro-mechanically coupled cyclic deformation of VHB™4910, including the ratchetting and cyclic stress-softening as well as their dependence on the loading level, loading rate and phase-angle difference of cyclic electro-mechanical loading, can be reasonably predicted by the proposed constitutive models.
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Materials Today Physics,2020,14():100219
2020年08月01日
Stretchable tactile sensor (STS) is promising for wearable electrical devices, human-machine interfaces, and electronic skin. However, developing a STS based on piezoresistive composite high-pressure sensitivity and dynamic stability remains challenging because stretching deformation destroys the original dispersed state of conductive fillers. This interference of stretching strain on the pressure sensing greatly reduces device performance. Here, we realize an STS based on a piezoresistive composite with different elastic modulus in its functional regions. The composite contains high elastic modulus region (59.1 MPa) of vertically aligned columns of urchin-shaped nanoparticles, and low elastic modulus region (2.4 MPa) of pure matrix. The sensor exhibits high-pressure sensitivity (12.05 kPa−1) owing to the increased conductive contact area between urchin-shaped nanoparticles in the high elastic modulus region. While stretching to 400% strain, the sensor exhibits excellent dynamic stability via strain accommodation in the low elastic modulus region. Our design to separate sensing from multiple stimulus by elastic modulus regulation is easy operative and universal. In addition, the sensor has a low hysteresis coefficient (5.25%), a good detection limit (22 mg), a low response/recovery time (<50 ms), and an excellent mechanical durability (cycled 10,000 times). Finally, we demonstrate the use of our STS for several important stretchable electronic applications to show the feasibility of our design.
Stretchable E-skin Elastic modulus regulation Urchin-shaped conductive magnetic nanoparticles Pressure sensitivity Stretching insesnitivity
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【期刊论文】A constitutive model for multi network elastomers pre-stretched by swelling
Extreme Mechanics Letters,2020,40():100926
2020年10月01日
Multi network elastomers (MNEs), composed of a single sacrificial network and other matrix networks, exhibit appealing mechanical properties. In this paper, we develop a constitutive model for MNEs prepared by multiple swellings. Firstly, the swelling process is analyzed. The free energy of a swollen elastomer consists of the strain energy of deformed polymer chains and the energy of mixing. We analyze the mechanical equilibrium and chemical potential equilibrium during the swelling of MNEs. The degree of swelling of MNEs is affected by the preparation conditions, like the component of the solution, as well as the microscopic physical quantities, such as the chain length and density of polymer chains of the networks. Secondly, the free energy of the completed MNE subjected to external loading is composed of the strain energy of each network. The chains of the sacrificial network (first network) can be destroyed gradually when the applied load increases. We adopt the network alteration theory to describe the above progressive damage of the sacrificial network. In addition, the matrix networks are fully elastic. We verify this model using the experimental data including stress–stretch curves of elastomers with double and triple networks, as well as the step cycle curves of triple network elastomers (TNEs). This model predicts well for the swelling-induced pre-stretches of each network under specified preparation conditions. It relates the stress to the stretch of MNEs under external loading, and indicates the stress contribution of each network, and the damage evolution of the sacrificial network. Our model is instructive for designing MNEs with desired mechanical properties.
Multi network elastomer Swelling Free energy Damage
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J. Appl. Mech. ,2020,87(11):110801
2020年08月05日
In this paper, we review constitutive models for soft materials. We specifically focus on physically based models accounting for hyperelasticity, visco-hyperelasticity, and damage phenomena. For completeness, we include the thermodynamically based viscohyperelastic and damage models as well as the so-called mixed models. The models are put in the frame of statistical mechanics and thermodynamics. Based on the available experimental data, we provide a quantitative comparison of the hyperelastic models. This information can be used as guidance in the selection of suitable constitutive models. Next, we consider visco-hyperelasticity in the frame of the thermodynamic theory and molecular chain dynamics. We provide a concise summary of the viscohyperelastic models including specific strain energy density function, the evolution laws of internal variables, and applicable conditions. Finally, we review the models accounting for damage phenomenon in soft materials. Various proposed damage criteria are summarized and discussed in connection with the physical interpretations that can be drawn from physically based damage models. The discussed mechanisms include the breakage of polymer chains, debonding between polymer chains and fillers, disentanglement, and so on.
constitutive modeling of soft materials,, mechanical properties of soft materials
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J. Mater. Chem. C,2020,8():7688-7697
2020年05月20日
Conductive hydrogel based soft electronics with superior mechanical/electrical properties and biocompatibility have great potential for sensing and stimulation at device–human interfaces, in which one piece of the functional gel is usually used as a multi-sensor to chemicals, mechanical deformations, etc. Also, it is important to develop a facile strategy for patterning intricate circuits and conductive components in a hydrogel system to afford integrated functions. Demonstrated here is a hybrid conductive hydrogel system that can be facilely patterned and integrated with complex circuits, which enables monitoring of multiple signals, including tensile strain, out-of-plane pressure, and temperature. The conductive hydrogel was fabricated by a stencil-aided printing of percolated silver nanowires (AgNWs) on a tough supramolecular hydrogel with robust interfacial bonding. The obtained hydrogel-based electronics exhibited remarkable electrical and mechanical properties, with a sheet resistance of 0.76 Ω sq−1, breaking strain of over 600%, breaking stress up to 3.3 MPa, and self-healing ability, superior to most existing conductive hydrogels. The strain sensors exhibited a gauge factor up to 58.2, enabling monitoring various subtle human motions. Multiple sensing units can be facilely fabricated in this approach using a well-designed silhouette mask. The powerful functions of the integrated electronics were manifested by the detection of complex stress or temperature fields.
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