剪切增稠胶的力学行为与作用机理研究

剪切增稠型智能材料能够根据环境应力场刺激自动调节自身力学性能，因而在安全防护材料领域引起世界各国专家的高度重视。目前，在安全防护领域最受关注的剪切增稠型智能材料主要有剪切增稠液、剪切增稠液/纤维复合材料和剪切增稠胶三种。本申请针对剪切增稠液及其复合材料的不足，在已有的预研基础上，优化剪切增稠胶材料的制备方法，建立剪切增稠胶材料的力学性能测试表征系统，从理论和实验两方面研究不同应变率条件下剪切增稠胶材料的力学行为，结合力学性能与内在微观结构演化，探索该类智能材料在抗冲、吸能过程中的实际机理，建立能正确描述其力学行为的模型。最后，结合理论和实验结果，优化设计智能安全防护器件，推动剪切增稠胶材料的工程应用。

When encountering the external stress, the shear thickening smart materials can adjust their mechanical characteristics. Thus they have attracted intensive interests of researchers in the safe protection area all over the world. They mainly consist of shear thickening fluid (STF), STF/Kevlar composite, and shear thickening gel (STG). To overcome the weakness in the area of shear thickening fluid and STF/Kevlar composite, we proposed this proposal based on our pre-studies. Here, we will focus on optimizing the preparation of the shear thickening gel, designing the mechanical property measurement system, and investigating its unique protection behavior. In combing the experimental study, theoretic analysis and computer simulation together, the mechanical behavior of STG under different shear rate will be investigated. By studying the structure dependent mechanical property, the anti-shocking mechanism will be obtained. Then, the relative mechanical model will be established and the behavior simulation of the composite materials will be conducted. Based on the above results, we will design novel safe protection device, develop multifunctional body armor, analyze their protection ability, and then promote the practical application of shear thickening gel.