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Temperature-Dependent tearing Behavior of Rubber Materials:Characterization and Modeling

Acta Mechanica Solida Sinica 2024年第2期37卷 316-326页

作者： Qinyuan Yao Feilong Zhang Pan Dong Ziyuan Zhao Yi He Weiguo Li Liming Chen State Key Laboratory of Coal Mine Disaster Dynamics and Control Chongqing UniversityChongqing400044China College of Aerospace Engineering Chongqing UniversityChongqing400044China

With the increasingly widespread application of rubber in many fields,there is a growing demand for quantitative characterization of temperature-dependent mechanical properties in high-temperature service *** critical tearing energy is an important criterion for determining whether rubber materials will experience tearing instability,while tear strength is a key parameter for rubber materials to resist *** is necessary to quantitatively characterize their evolution with *** theoretical research mainly relies on fitting a large amount of experimental data,which is not convenient for engineering ***,in this work,a temperature-dependent critical tearing energy model is firstly developed based on the force-heat equivalence energy density *** model considers the equivalent relationship between the critical tearing energy required for crack instability propagation and the thermal energy stored in the rubber *** is demonstrated that our model has higher prediction accuracy when compared to other ***,combining with the Griffith fracture theory,temperature-dependent tear strength models applicable to three different crack modes are separately *** models are validated using experimental data for Mode I opening cracks and ModeⅢtearing cracks,and good consistency is ***,a quantitative analysis of the influence of elastic modulus on tear strength at different temperatures is *** work provides a reliable way for predicting temperature-dependent tearing instability behavior and offers beneficial suggestions for improving the tear strength of rubber materials at different temperatures.

关键词： Temperature-dependent Critical tearing energy tear strength Rubber Theoretical model

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Evaluate the strength of Denim Goods Using Different Washing Technique

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Journal of Materials Science and Chemical Engineering 2021年第3期9卷 1-8页

作者： Jakaria Ahamed Md. Faysal Mahmud Md. Faysal Ahammed Rony Mia Md. Zahid Hasan Tarequl Hasan Khan Golam Qibria Limon Al Mojnun Shamim Department of Textile Engineering National Institute of Textile Engineering & Research (NITER) Savar Dhaka Bangladesh School of Textile Science & Engineering Wuhan Textile University Wuhan China College of Chemistry & Chemical Engineering Wuhan Textile University Wuhan China

Day by day, the demand and popularity of denim have increased. With the increase in demand for denim, washing has also increased. When we washed a piece of denim fabric, then its properties also changed. The properties are tensile strength, GSM, color fading, stiffness, abrasion resistance, moisture regain, etc. In this study, we conduct different washing processes on denim fabric such are Stonewash, Caustic wash, Acid wash, Normal wash, Pigment wash, Sandblasting, and Super whitewash. After washing, the properties of denim fabric have been analyzed especially strength. The tear and tensile strength were measured by ISO standard. From the above washing method, Normal & pigment wash showed good strength properties comparing with others.

关键词： Denim Fabric Washing Treatment tear strength Tensile strength Normal Wash Pigment Wash

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牛仔布质量关键因素评估的实验研究

牛仔布质量关键因素评估的实验研究

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作者： Nazmus Sakib 浙江理工大学

学位级别：硕士

Uses of denim are increasing day by day because of its flexibility,comfortability,and *** the last few years,there are lots of development invented for making better quality and comfortable *** not only search for fashionable garments,but also want comfortable and quality *** comfort has been identified as one of the key attributes in consumers' perception of the desirability of apparel products in all *** the extensive research in the area of comfort perception and clothing,there are still uncertainties with regard to fabric or garment *** garments are evaluated according to how good quality fabric is used for *** quality garments can be defined when Psychological,sensorial,and thermos physiological comfort can be ***-physiological comfort was affected by the fiber type,fiber fineness,yarn quality,fabric structure,and finishing *** it is very important to understand how different factors affect the quality of *** all of our focus should be on making perfect quality *** we know different construction,different fiber content has different properties,which has different influences on ***,in this study,I used five different denim samples where constructions are different but fiber content is same for these five samples.98%cotton&2%Lycra is used for this *** quality denim means high performance fabric,which must be ensured by quality tests like tensile strength,tear strength,dimensional stability,and color fastness to wash,water&*** these results fulfill customer's valuable *** relate customers claim the quality test is a good way to evaluate if there is any problem,what is the problem,even if it is a problem or how to solve *** study shows that to ensure high quality is the only way of high quality denim and jeans on the point of the differences how quality changes in terms of denim construction and *** in my study I discu

关键词： Denim Quality Weaving Tensile strength tear strength Desizing Finishing

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