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Your search keyword '"Liu, Jianxing"' showing total 415 results
Start Over Author "Liu, Jianxing" Publication Type Academic Journals Publication Type Conference Materials
415 results on '"Liu, Jianxing"'

28. Harnessing the interface mechanics of hard films and soft substrates for 3D assembly by controlled buckling

Author

Liu, Yuan, Wang, Xueju, Xu, Yameng, Xue, Zhaoguo, Zhang, Yi, Ning, Xin, Cheng, Xu, Xue, Yeguang, Lu, Di, Zhang, Qihui, Zhang, Fan, Liu, Jianxing, Guo, Xiaogang, Hwang, Keh-Chih, Huang, Yonggang, Rogers, John A, and Zhang, Yihui

Subjects
3-dimensional assembly, buckling, interface mechanics, reconfigurable 3D structures
Abstract

Techniques for forming sophisticated, 3D mesostructures in advanced, functional materials are of rapidly growing interest, owing to their potential uses across a broad range of fundamental and applied areas of application. Recently developed approaches to 3D assembly that rely on controlled buckling mechanics serve as versatile routes to 3D mesostructures in a diverse range of high-quality materials and length scales of relevance for 3D microsystems with unusual function and/or enhanced performance. Nonlinear buckling and delamination behaviors in materials that combine both weak and strong interfaces are foundational to the assembly process, but they can be difficult to control, especially for complex geometries. This paper presents theoretical and experimental studies of the fundamental aspects of adhesion and delamination in this context. By quantifying the effects of various essential parameters on these processes, we establish general design diagrams for different material systems, taking into account 4 dominant delamination states (wrinkling, partial delamination of the weak interface, full delamination of the weak interface, and partial delamination of the strong interface). These diagrams provide guidelines for the selection of engineering parameters that avoid interface-related failure, as demonstrated by a series of examples in 3D helical mesostructures and mesostructures that are reconfigurable based on the control of loading-path trajectories. Three-dimensional micromechanical resonators with frequencies that can be selected between 2 distinct values serve as demonstrative examples.

Published
2019

37. Study on the Effects and Mechanism of the Reinforcement of Soft Clay via Microbially Induced Carbonate Precipitation.

Author

Wu, Huaan, Xie, Xinyu, Xu, Chuntai, Liu, Jianxing, Zheng, Xudong, and Zheng, Lingwei

Subjects
SOIL compaction, INTERNAL friction, SHEAR strength, CALCIUM carbonate, COMPRESSIVE strength
Abstract

A series of microbial-induced carbonate precipitation (MICP) experiments were conducted using Sporosarcina pasteurii to reinforce coastal soft clay in Zhejiang. By analyzing the physical and mechanical parameters of samples of varying ages, specifically focusing on each sample's unconfined compressive strength, triaxial shear strength, and permeability coefficient, it was revealed that MICP technology can be used effectively to reinforce coastal clay. The unconfined compressive strength of treated soil increased by 23% compared to untreated soil, while the permeability coefficient decreased by 75%. The internal friction angle of the clay remained almost constant, whereas cohesion significantly increased by approximately 53%. One-dimensional compression experiments were also performed, yielding consolidation parameters such as the compression coefficient, compression index, and consolidation coefficient. The results indicated a notable decrease in the soil compression index. Furthermore, microscopic analysis revealed that clay particles were cemented by calcium carbonate, whose precipitation was induced by the bacteria. Our XRD results also indicated that the bacteria facilitated the conversion of Ca2+ present in the soil into calcium carbonate. [ABSTRACT FROM AUTHOR]

Published
2024
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