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高分子囊泡是一类由薄膜包裹液体而形成的“软粒子”，其在生物医药、化妆品以及食品等领域具有广泛的应用，是材料领域最富有意义的研究内容之一。与一般微纳米粒子相比，高分子囊泡在外场作用下极易发生形变，因而研究高分子囊泡在微流道中穿过受限孔洞的动力学行为对其在药物输运、细胞筛选、薄膜性能表征等应用领域具有重要的意义。 由于流体（高分子囊泡内部和外部流体）和固体（高分子囊泡膜）强烈地耦合在一起，再加上流体与膜边界的移动和变形，使得高分子囊泡实际的过孔图像十分复杂。本工作借助COMSOL Multiphysics流固耦合（FSIs）接口，运用任意拉格朗日-欧拉（ALE）算法 ... Mehr lesen
A very important phase in construction of a pavement structure is the compaction process of the asphaltic mixture. It reflects a complex mechanism where many parameters are influential. These parameters are associated with the initial air voids content in the asphaltic mixture, aggregate ... Mehr lesen
As a sustainable urban transport system, the tricycle can represent an adaptive mobility vehicle used to transport people and bulk load. This transport system must guarantee the security of its end users, so experimental and modeling works are very useful tools in order to evaluate the ... Mehr lesen
在对以聚二甲基硅烷（PDMS）为腔道材料的声表面波（SAW）微流控器件建模时，通常采用简化模型来描述PDMS的声学特性。本文以声表面驻波（SSAW）微流控芯片为例，通过三种不同的方式对PDMS腔体建模，利用有限元方法分析了腔体内部的物理场和腔体内粒子的运动过程。对PDMS腔体建模时，分别采用COMSOL中的固体力学、压力声学和声阻抗边界三种方式分析PDMS腔体对微流腔内声场和流场的影响。从结果中我们发现，PDMS中的横波并不会显著影响腔体内的声场和声辐射力场，但会对声流产生较为明显的影响，进而影响受声场和流场作用的粒子运动轨迹 ... Mehr lesen
In this work a modified anisotropic creep model with structure for soft soils was implemented by using the Physics Builder. The model is validated against boundary value laboratory test such as undrained tri-axial tests and CRS (constant rate of strain) tests. The implemented user ... Mehr lesen
Ionic polymer-metal composite (IPMC) materials are promising candidates for soft robotics and artificial muscle applications. The primary actuation mechanism in such devices is ion migration in a polymer membrane, localized swelling, and a corresponding overall material deformation, ... Mehr lesen
During the manufacturing of CFRP components one of the most critical process steps is the vacuum bagging. In this process several layers of material are draped separately over complex part shapes. The specific properties of each material, which are needed for the process (i. e. breather, ... Mehr lesen
Silicide-based thermoelectric modules (TEMs) for power generation operate at mid-high temperature range. In the operating conditions, thermal stresses in materials with different coefficient of thermal expansion may reduce the mechanical strength of the modules. In this work, a finite ... Mehr lesen
反应堆内固有的多物理场环境使得核燃料的堆内行为演化十分复杂，除了传统的热、力学现象外，反应堆内中子辐照场对核燃料性能演化具有至关重要的作用，主要体现在：1）中子辐照将引起材料内部发生显著的微结构演化，这一方面将影响燃料及包壳材料的热物理性能，另一方面，材料微结构演化将引起特殊的宏观变形现象，例如辐照肿胀、辐照生长等；2）核素裂变产生的难溶性或易挥发性裂变产物在燃料基质内积累、扩散、聚集并最终释放进入气腔引起的裂变气体释放现象。为了准确预测反应堆内燃料元件的热、力及辐照性能演化，本文基于多物理场耦合分析平台COMSOL，搭建了棒状燃料热-力-辐照耦合性能分析工具 ... Mehr lesen
Heat treatment of the advanced steel grades (like micro-alloyed steels or AHSS steel grades) is a challenging process as the residual stress/deformation are very pronounced and the customer quality requirements are getting stricter. Instead of a trial and error based process control, a ... Mehr lesen