检索结果-南通市图书馆

A temperature/strain-rate-dependent finite deformation constitutive and failure model for solid propellants

Science China(Physics,Mechanics & Astronomy) 2023年第9期66卷 63-78页

作者： Ming Lei Erhao Chen Zeang Zhao Lihua Wen Jinyou Xiao Xiao Hou School of Astronautics Northwestern Polytechnical UniversityXi’an 710072China Institute of Advanced Structure Technology Beijing Institute of TechnologyBeijing 100081China China Aerospace Science and Technology Corporation Beijing 100048China

The stress-strain response under progressive damage and the ultimate failure of solid propellants are two key issues affecting the integrity of solid rocket *** research primarily focused on the progressive damage in solid propellants during production and ***,they failed to take the temperature/strain-rate-dependent ultimate failures into *** failure strains of solid propellants are experimentally observed to show strong temperature/strain-rate dependence and exhibit an abnormal evolution at low and high temperatures,*** increasing loading strain rate,the failure strains decrease at low temperatures near the glass transition temperature(T_g)but increase at high temperatures far above T_(g).In this study,we introduce the glassy and rubbery failure criteria based on strain energy densities at ultralow and ultrahigh temperatures,respectively,into a viscoelastic constitutive model and build a unified model for the progressive damage and the ultimate failure of solid *** the introduction of these two additional criterion parameters,the developed model can effectively predict the yield-type stress-strain responses,microscopic damage-induced volume dilatations,and temperature/strain-ratedependent ultimate failures of the solid propellants by comparing the model predictions with the experimental *** competition between the glassy failure and the rubbery failure results in the propellants exhibiting a maximum break strain near the glass transition ***,when the strain rate is increased,the propellants exhibit a predominantly glassy response,which shifts the failure envelope toward a higher *** induces an abnormal evolution of failure strains by making the propellants stretchable at high temperatures and brittle at low temperatures.

关键词： viscoelastic material polymeric material constitutive behavior fracture toughness failure envelope

来源：

维普期刊数据库

同方期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Polymer-based Nanogenerator for Biomedical Applications

引用

Chemical Research in Chinese Universities 2020年第1期36卷 41-54页

作者： LI Jun LONG Yin WANG Xudong Department of materials Science and Engineering University of Wisconsin-MadisonMadisonWisconsin 53706USA

polymeric devices are the workhorses of modern *** one of the cutting-edge technology leveraging polymeric materials,nanogenerator that could convert micro-/nano-scale mechanical energy into electri-city based on the mechanism of piezoelectricity and triboelectricity exhibited great promise for biomedical applications,owning to the simple configuration,high efficiency,decent electrical output,biomimetic property as well as excellent *** this manuscript,the recent representative developments of NGs in biomedical applications are ***,such as working mechanisms underneath different NG prototypes are discussed,which is followed by innovative strategies endowing NG with biomimetic mechanical *** attempts to implement NG in specific biomedical fields(e.g.,power source for implantable medical devices,therapeutic electric stimulator,etc.)are introduced and *** manuscript ends up with subsection summarizing existed challenges while providing potential solutions for future NG developments in biomedical engineering.

关键词： Nanogenerator polymeric material Biomedical application

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Surgical staples:Current state-of-the-art and future prospective

引用

Medicine in Novel Technology and Devices 2022年第4期16卷 150-161页

作者： Sumanta Ghosh Namdev More Govinda Kapusetti Department of Medical Devices National Institute of Pharmaceutical Education and Research(NIPER)AhmedabadOpposite Air Force StationPalajGandhinagar382355GujaratIndia

Wound closing is one of the widely performed and prominent clinical practices in the surgical intervention process.A physician or surgeon has several options ranging from surgical sutures and adhesive strips to fibrin glue for effective wound closure to close the commonly occurring surgical cuts and deep skin tissue ***,all the commercially available wound closure devices have some limitations in each and another *** the beginning of the late 90s,surgical staples got tremendous attention as efficient wound closure devices for their time-effective and sufficient mechanical strength,performance feasibility,fewer chances of surgical site infection and require minimal expertise characteristics in consideration of remote *** in the context of the recent COVID19 pandemic,the clinical acceptance and patient compliance for the staples have increased due to minimizing the chances of prolonged interaction between the patient and *** surgical staples application is extensive and diversified,ranging from common external cuts to highly complex surgery procedures like laparoscopic appendectomy,intestinal anastomosis,***,in this literature review,we try to give a comprehensive glimpse of the development and current state-of-the-art surgical staples in consideration with research from a commercial point of *** a special note,this review also describes a very brief outline of the regulatory aspects and some common internationally acceptable‘de jure standards for the development of commercially viable surgical staples.

关键词： Surgical staples Wound healing Finite element analysis Suture polymeric material

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：