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A Review on the Mullins Effect in Tough Elastomers and Gels

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Acta Mechanica Solida Sinica 2024年第2期37卷 181-214页

作者： Lin Zhan shaoxing Qu Rui Xiao MOE Key Lab of Disaster Forecast and Control in Engineering College of Mechanics and Construction EngineeringJinan UniversityGuangzhou510632China State Key Laboratory of Fluid Power and Mechatronic System Key Laboratory of Soft Machines and Smart Devices of Zhejiang ProvinceDepartment of Engineering MechanicsZhejiang UniversityHangzhou310027China

Tough elastomers and gels have garnered broad research interest due to their wide-ranging potential ***,during the loading and unloading cycles,a clear stress softening behavior can be observed in many material systems,which is also named as the Mullins *** this work,we aim to provide a complete review of the Mullins effect in soft yet tough materials,specifically focusing on nanocomposite gels,double-network hydrogels,and multi-network *** first revisit the experimental observations for these soft *** then discuss the recent developments of constitutive models,emphasizing novel developments in the damage mechanisms or network *** phenomenological models will also be briefly *** attention is then placed on the anisotropic and multiaxial modeling *** is demonstrated that most of the existing models fail to accurately predict the multiaxial data,posing a significant challenge for developing future anisotropic models tailored for tough gels and elastomers.

关键词： Mullins effect Double-network hydrogels Nanocomposite gels Multi-network elastomers Anisotropic damage model Multiaxial model

智能软材料多场耦合本构理论及其在软体机器中的应用

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中国科学：物理学、力学、天文学 2024年第6期54卷 2-14页

作者：肖锐钱劲曲绍兴浣江实验室诸暨311800 浙江大学工程力学系浙江省软体机器人与智能器件研究重点实验室杭州310027

智能软材料能在外场作用下产生激励效应,且其智能响应行为与大变形深度耦合,这对建立其力学本构理论提出了重要挑战.本文以形状记忆聚合物、液晶弹性体、介电弹性体、磁敏弹性体、智能水凝胶为代表性智能软材料,介绍了上述材料的发展概... 详细信息

智能软材料能在外场作用下产生激励效应,且其智能响应行为与大变形深度耦合,这对建立其力学本构理论提出了重要挑战.本文以形状记忆聚合物、液晶弹性体、介电弹性体、磁敏弹性体、智能水凝胶为代表性智能软材料,介绍了上述材料的发展概况以及在相关多场耦合本构理论领域的进展.智能软材料在软体机器人领域也有着广泛的应用前景,因此,本文也将探讨基于软材料多场耦合理论模型来设计软体机器人的现状以及不足之处,以期为后续该领域的发展提供借鉴.

关键词：软材料软体机器人多场耦合

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以“四轮”驱动战略推进“水上台州”建设

中国水利 2018年第23期 24-26页

作者： Taizhou municipal water resources bureau of zhejiang province 浙江省台州市水利局

“台州地阔海冥冥,云水长和岛屿青”。位于浙江东南沿海的台州市,市区河流纵横、水网密布,水域面积46.1 km^2,属典型的江南水乡。水是台州的特色和优势所在,山海之奇、经济之雄、历史之厚、人文之美塑造了这座充满生机和幸福的城市。“... 详细信息

“台州地阔海冥冥,云水长和岛屿青”。位于浙江东南沿海的台州市,市区河流纵横、水网密布,水域面积46.1 km^2,属典型的江南水乡。水是台州的特色和优势所在,山海之奇、经济之雄、历史之厚、人文之美塑造了这座充满生机和幸福的城市。“山海水城、和合圣地、制造之都”既是台州的城市特色,也是台州“十三五”时期的城市发展定位。做好“山海水城”文章,灵魂在水,核心是全市域构建“水上台州”。

关键词：台州市云水城市特色东南沿海水域面积江南水乡城市发展水城

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浙江绍兴印山大墓发掘简报

文物 1999年第11期 4-16,97-99+1+1页

作者： The Institute of Archaeology of zhejiang province CPAM of shaoxing County 浙江省文物考古研究所绍兴县文物保护管理所

印山大墓位于浙江省绍兴县城西南,是春秋晚期越王的陵墓。该墓的墓圹和墓道总长达100米,是在印山之巅的岩石中凿出,上堆筑高大的封土墩,四周围绕印山开挖长方形的壕沟,构成8500平方米的陵园。印山大墓墓室用加工规整的巨大方木构筑,室... 详细信息

印山大墓位于浙江省绍兴县城西南,是春秋晚期越王的陵墓。该墓的墓圹和墓道总长达100米,是在印山之巅的岩石中凿出,上堆筑高大的封土墩,四周围绕印山开挖长方形的壕沟,构成8500平方米的陵园。印山大墓墓室用加工规整的巨大方木构筑,室内髹漆,横截面呈等腰三角形,形成长达34.8米、高约5米的长条形木屋,分为前中后三室。中室顺置的一长6米余的独木棺,采用一大型圆木一剖为二,再经掏挖而成。该墓虽早年被盗,随葬品较少,但其规模庞大,结构奇特,是我国近年来重大考古发现之一。据研究,该墓就是史书上记载的“木客大冢”,墓主应是越王勾践之父允常。本期刊发了印山大墓的发掘简报。

关键词：印山大墓发掘简报独木棺随葬品绍兴县填土长方形浙江地区斜撑木浙江省

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山地地质灾害气象等级预报(预警)模型应用

山地学报 2006年第4期24卷 416-423页

作者：薛根元诸晓明王镇铭浙江省气象局浙江省绍兴市气象局

浙江省是一个山地地质灾害多发地区,这些灾害包括泥石流、滑坡、崩塌等,它们的发生大多与降水有关。在分析浙江省地质灾害发生规律的基础上,探讨了地质灾害气象等级预报(预警)模型的主要结构、功能和特点,重点讨论了该模型在台风强降水... 详细信息

浙江省是一个山地地质灾害多发地区,这些灾害包括泥石流、滑坡、崩塌等,它们的发生大多与降水有关。在分析浙江省地质灾害发生规律的基础上,探讨了地质灾害气象等级预报(预警)模型的主要结构、功能和特点,重点讨论了该模型在台风强降水引发的地质灾害预报(预警)中的应用情况。该模型应用于0414号台风“云娜”、0418号台风“艾利”影响期间浙江省地质灾害的预报(预警),取得了较好的效果。

关键词：数值预报地质灾害预报预警应用研究

Effects of nitrogen fertilization strategies on nitrogen use efficiency in physiology, recovery, and agronomy and redistribution of dry matter accumulation and nitrogen accumulation in two typical rice cultivars in zhejiang, China

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Journal of zhejiang University-Science B(Biomedicine & Biotechnology) 2007年第3期8卷 208-216页

作者： XIE Wen-xia, WANG Guang-huo, ZHANG Qi-chun, GUO Hai-chao (Institute for Soil and water resources and Environment, zhejiang University, Hangzhou 310029, China) Institute for Soil and water resources and Environment Zhejiang University Hangzhou 310029 China.

Field experiments were conducted in farmers’ rice fields in 2001 and 2002 to study the effects of nitrogen (N) man-agement strategies on N use efficiency in recovery (RE), agronomy (AE) and physiology (PE) and redistribution of dry matter accumulation (DMA) and nitrogen accumulation (NA) in two typical rice cultivars in Jinhua, zhejiang province. This study aimed mainly at identifying the possible causes of poor fertilizer N use efficiency (NUE) of rice in zhejiang by comparing farmers’ fertilizer practice (FFP) with advanced site-specific nutrient management (SSNM) and real-time N management (RTNM). The results showed that compared to FFP, SSNM and RTNM reduced DMA and NA before panicle initiation and increased DMA and NA at post-flowering. There is no significant difference between SSNM and FFP in post-flowering dry matter redistribution (post-DMR) and post-flowering nitrogen redistribution (post-NR). These results suggest that high input rate of fertilizer N and improper fertilizer N timing are the main factors causing low NUE of irrigated rice in the farmer’s routine practice of zhejiang. With SSNM, about 15% of the current total N input in direct-seeding early rice and 45% in single rice could be reduced without yield loss in zhejiang, China.

关键词： Recovery N use efficiency (RE) Agronomic N use efficiency (AE) Physiological N use efficiency (PE) Nitrogen management Rice Accumulation and redistribution

Modeling and Generating Realistic Background Traffic by Hybrid Approach

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China Communications 2015年第10期12卷 147-157页

作者： QIAN Yaguan GUAN Xiaohui JIANG Ming CEN Gang School of Science Zhejiang University of Science and Technology zhejiang University of water resources and Electric Power College of Computer Science Hang Zhou Dianzi University School of Information and Electronic Engineering Zhejiang University of Science and Technology

One of the key challenges in largescale network simulation is the huge computation demand in fine-grained traffic *** from using high-performance computing facilities and parallelism techniques,an alternative is to replace the background traffic by simplified abstract models such as fluid *** paper suggests a hybrid modeling approach for background traffic,which combines ON/OFF model with TCP *** ON/OFF model is to characterize the application activities,and the ordinary differential equations(ODEs) based on fluid flows is to describe the TCP congestion avoidance *** apparent merits of this approach are(1) to accurately capture the traffic self-similarity at source level,(2) properly reflect the network dynamics,and(3) efficiently decrease the computational *** experimental results show that the approach perfectly makes a proper trade-off between accuracy and complexity in background traffic simulation.

关键词： network simulation background traffic ON/OFF models fluid flows self-similarity

Inclusion Size Effect on Mechanical Properties of Particle Hydrogel Composite

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Acta Mechanica Solida Sinica 2019年第5期32卷 643-651页

作者： Xiaocheng Hu shaoxing Qu State Key Laboratory of Fluid Power and Mechatronic System Key Laboratory of Soft Machines and Smart Devices of Zhejiang ProvinceDepartment of Engineering Mechanics38 Zheda RoadHangzhou 310027China

Particle hydrogel composite(PHC)combines the characteristics of at least two mat erials and has pot ential applications in many *** functions require the particle size to range from nanometer to millimeter,which has a noticeable effect on the mechanical properties of the hydrogel *** this paper,the mechanical properties of silica-inlaid PAAM hydrogel are measured with various particle diameters from 75 nm to 50|*** results show no obvious size effect on the mechanical properties of PHC when the particle diameter falls in micron ***,as the particle size decreases to nanoscale,the modulus of the PHC begins to increase *** size-irrelevant moduli and stress fields of PHCs with random and uniform particle distributions under different loading conditions are obtained based on the finite element ***,the toughening mechanism and the failure of the PHC are *** size-irrelevant modulus of the PHC is also predicted by the equivalent inclusion ***,the interaction between the hydrogel polymer chains and the particles is described from the microscopic point of view,requiring the nanoscale size-dependent theory and new experimental approach to further explore the mechanical proper ties of PHC.

关键词： Particle hydrogel composite Size effect Finite element method

Isotope Tracing and Prospecting Assessment of Gold-Silver Deposits in zhejiang province

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Acta Geologica Sinica(English Edition) 1997年第3期71卷 293-304页

作者： Chen Haoshou and Xu Butai Department of Earth Sciences, zhejiang University, Hangzhou, zhejiang zhejiang Institute of Geology and Mineral resources, Hangzhou, zhejiang Liu Xinzhu Department of Earth Sciences Zhejiang University Hangzhou Zhejiang zhejiang Institute of Geology and Mineral resources Hangzhou Zhejiang [?]Chen Haoshou Born in 1939 graduated from the Geochemistry Specialty of the Department of Geology Peking University in 1964. He has long been engaged in researches on isotopic geochemistry and worked successively in Tianjin Institute of Geology and Mineral Resources Xi' an Institute of Geology and Mineral Resources and Yichang Institute of Geology and Mineral Resource under the Chinese Academy of Geological Sciences. He is now professor of Zhejiang 1Jniversity.

Three different types of gold and silver deposits in zhejiang province(Huangshan gold deposit, Zhilingtou gold-silver deposit and Haoshi silver deposit) showmarked differences in lead and strontium isotopic composition, suggesting three differentsources and geneses of these deposits. The Huangshan gold deposit features low initial Srisotope ratios and low μ values or low content of radiogenic Pb and its ore-forming materialscame primarily from the upper mantle; the Zhilingtou gold-silver deposit shows high initial Srisotope ratios and high μ values or high content of radiogenic Pb and the ore-forming materialswere derived mainly from the upper crust; and the Haoshi silver deposit has its Pb and Srisotope ratios between the above two cases with the ore-forming materials stemming from boththe mantle and the crust. The characteristic Pb isotopic composition may serve as an indicatorfor prospecting for different types of ore deposits.

关键词： isotope tracing gold deposit silver deposit zhejiang province