Results 11 to 20 of about 625,687 (114)
, 2023 聚脲是一种由异氰酸酯组分和氨基组分反应生成的新型弹性体高聚物.由于聚脲具有断裂伸长率高、应变率强化、高耗能等一系列优异的力学性能,其在国防、能源、交通等领域显示出广阔的应用前景.目前,国内外学者针对聚脲在不同温度、不同应变率下的静动态力学性能开展了大量研究,在此基础上提出了多种本构模型,对温度、应变率等因素相关的力学行为进行了描述和预测.这些工作为深刻理解聚脲抗冲击机理及材料的进一步应用奠定了基础.文章首先简要介绍了聚脲弹性体的微相分离结构及特点 ...
龚臣成, 陈艳, 戴兰宏
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, 2007 目前,力学界广泛采用黏聚力模型表征界面的力学响应,模拟界面的开裂与裂纹扩展。黏聚力模型是一个宏观唯象的模型,是对不同空间尺度界面现象的简化,具体表示为界面相对位移与粘结力的解析关系式 ...
尤雪梅, 魏悦广
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, 2013 利用有限元计算方法,采用包含拉剪混合破坏模式的双线性内聚力模型,讨论了内聚力模型中初始刚度,断裂能,内聚强度等内聚参数的黏接层厚度依赖性及相应的选取方法 ...
廖丽涓, 黄晨光
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Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Biodegradable zinc (Zn)‐based materials are considered promising candidates for orthopedic applications because of their favorable mechanical properties, controllable biodegradability, and good biosafety profiles. However, their clinical translation is limited by early‐stage corrosion‐induced cytotoxicity and inflammation, as well as ...
Jinlong Mao +9 more
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Shuitu Baochi Xuebao, 2023 为研究自然边坡其强度特性随含水率的变化规律。通过设计不同体积含水率(20%,27%,35%,40%,45%)和2种含根量(RAR=0.1%,0.3%)的重塑土进行不固结不排水三轴试验,以研究含水率对土体破坏方式、抗剪强度和初始切线模量的影响。结果表明:(1)试样破坏模式多为剪切变形和剪胀变形,在含水率为20%,27%时,出现明显剪切贯穿面破裂带,其余含水率下表现为剪胀变形;(2)含水率对根土复合体抗剪强度主要体现在黏聚力上,含水率从20%升至45%时,2种含根量的根土复合体黏聚力分别降低67%,72 ...
骆丕昭 +5 more
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Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Thermo‐responsive hydrogels based on poly(N‐isopropylacrylamide) (PNIPAM) are promising candidates for soft actuation, yet their practical applications are often constrained by sluggish thermo‐responsive kinetics and insufficient mechanical robustness.
Hui Liu +5 more
wiley +1 more source
Surface Properties of Pediococcus pentosaceus and Antibacterial Effect(戊糖片球菌表面蛋白性质及抑菌作用研究) [PDF]
Shipin kexue jishu xuebao, 2019 The growth condition and analysis of acid production capacity showed that Pediococcus pentosaceus F28-8 had a good acid adaptability, and the surface structure was observed with transmission electron microscopy. The S-layer was extracted with 5mol/L LiCl
SUN Yanfei(孙艳菲) +6 more
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, 2013 壁虎具有超强的黏附爬行能力,几乎能在任意表面上行走,其特殊的黏附本领引起了人们的广泛关注.本文介绍了壁虎脚掌的精细黏附系统结构是其超强黏附能力的主要来源,并综述了目前国内外对壁虎黏附机理的研究进展.最后 ...
陈少华, 彭志龙
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Shuitu Baochi Xuebao, 2017 三峡水库消落带在高压淹水浸泡和干湿交替作用下，土壤力学特性必然发生变化，影响土体抗侵蚀性能，破坏库岸稳定性。目前对消落带土壤力学特性变化及其对淹水—落干驱动的响应尚不明确。以三峡水库消落带广泛分布的紫色土为研究对象，模拟水压作用和淹没—出露交替过程，研究紫色土应力—应变和抗剪强度参数对高压淹水和干湿交替作用的响应。结果表明：水柱压力、干湿交替次数和干湿交替幅度都能显著驱动紫色土力学特性发生变化。与对照组相比，随着水柱压力增加，紫色土刚度逐渐增强，黏聚力降低幅度变小，内摩擦角增大。随干湿交替次数增加 ...
吕发友, 鲍玉海, 唐, 曹植菁
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