版權(quán)說明:本文檔由用戶提供并上傳,收益歸屬內(nèi)容提供方,若內(nèi)容存在侵權(quán),請(qǐng)進(jìn)行舉報(bào)或認(rèn)領(lǐng)
文檔簡(jiǎn)介
1、Glass fiber mat and kenaf fiber mat reinforced thermosetting composites are usually post cured at an elevated temperature and then cooled to room temperature.Because of their dissimilarity in nature and expansion-contrac
2、tion behavior and different mechanical properties of the two components (fiber and resin),thermal stresses and strain can be easily generated.These effects are elevated by environmental agents like moisture,temperature v
3、ariation and thermal cycling,which can be occurred in a working environment.The aim of the present work is to investigate the influence of thermal cycling fatigue with open air moisture on mechanical properties of glass
4、fiber mat unsaturated polyester (UP) resin composites and comparing with kenaf fiber mat UP composites,although thermal cycling effects on mechanical properties of different types of paper mat/UP were described briefly a
5、t the end of this study.For this purpose,notched and un-notched tensile test,low cycle tensile fatigue tests were performed to the both types of specimens,which have previously been subjected to a certain number of therm
6、al cycles (from+58 oC to-25 oC).The influence and maximum changes of notched and un-notched tensile strength,modulus are delineated in this work.And different phenomena of low cycle fatigue (LCF) are described graphicall
7、y after experiencing thermal cycling of both types of composites.Scanning electron microscopy (SEM) was used to monitor the potential changes in the microstructure due to the degradation caused by the thermal cycles.
8、 In case of tensile properties,in this study after definite number of thermal cycling kenaf mat composites suffered much than the glass mat composites.But notched kenaf mat composites;dropped off same percentage of thei
9、r notched strength compared to glass mat composites.In this case kenaf mat showed a sharp better notched strength property considered to glass mat composites.From the finite element analysis (FEA) we also get the corresp
10、onding results,that was after thermal cycling kenaf mat/UP showed longer characteristic distances and better resistance properties against hole effect.
After definite number thermal cycles except 100 cycles in LCF t
11、ests there was almost same type of modulus variation in every LCF cycles,these indicate the better performance properties of kenaf mat/UP compared to glass mat/UP in loading application of environmental service life.But
12、after 100 thermal cycles,the kenaf mat/UP become weakened in case of modulus drop,although tensile strength changing rate was little bit less than that of glass mat/UP.
Although glass fiber/UP composite had superior
13、 mechanical properties considering the volume fraction and fiber strength but after thermal cycling kenaf mat/UP showed better energy absorption properties,better tensile notched strength properties and better resistance
14、 properties against the hole effect.This phenomena happened probably because of the difference in fiber molecular structure and fiber matrix interfacial adhesion.
Only un-notched tensile properties of three differen
溫馨提示
- 1. 本站所有資源如無特殊說明,都需要本地電腦安裝OFFICE2007和PDF閱讀器。圖紙軟件為CAD,CAXA,PROE,UG,SolidWorks等.壓縮文件請(qǐng)下載最新的WinRAR軟件解壓。
- 2. 本站的文檔不包含任何第三方提供的附件圖紙等,如果需要附件,請(qǐng)聯(lián)系上傳者。文件的所有權(quán)益歸上傳用戶所有。
- 3. 本站RAR壓縮包中若帶圖紙,網(wǎng)頁內(nèi)容里面會(huì)有圖紙預(yù)覽,若沒有圖紙預(yù)覽就沒有圖紙。
- 4. 未經(jīng)權(quán)益所有人同意不得將文件中的內(nèi)容挪作商業(yè)或盈利用途。
- 5. 眾賞文庫僅提供信息存儲(chǔ)空間,僅對(duì)用戶上傳內(nèi)容的表現(xiàn)方式做保護(hù)處理,對(duì)用戶上傳分享的文檔內(nèi)容本身不做任何修改或編輯,并不能對(duì)任何下載內(nèi)容負(fù)責(zé)。
- 6. 下載文件中如有侵權(quán)或不適當(dāng)內(nèi)容,請(qǐng)與我們聯(lián)系,我們立即糾正。
- 7. 本站不保證下載資源的準(zhǔn)確性、安全性和完整性, 同時(shí)也不承擔(dān)用戶因使用這些下載資源對(duì)自己和他人造成任何形式的傷害或損失。
最新文檔
- Mechanical Properties of Green Composites Reinforced with Flaxseed Fiber Bundles.pdf
- 管理能力測(cè)驗(yàn)mat
- mechanical and thermal evaluation of ultra high performance fiber reinforced concretes for engineering applications
- Mechanical and thermal evaluation of Ultra High Performance Fiber Reinforced Concretes for engineering applications.pdf
- 基于mat自然圖像摳圖算法研究
- um_mm16_row mat.sale
- Mechanical and thermal evaluation of Ultra High Performance Fiber Reinforced Concretes for engineering applications.pdf
- MIMO信道中MAT方案的性能研究.pdf
- 2017.7初級(jí)管理會(huì)計(jì)mat原題含答案
- 2017初級(jí)管理會(huì)計(jì)mat原題含答案
- 2017.7初級(jí)管理會(huì)計(jì)mat原題含答案
- evaluation system and method for sustainable development of regional ski sports tourism based on mat
- P2P網(wǎng)絡(luò)中的MAT穿透機(jī)制研究.pdf
- 2017.7初級(jí)管理會(huì)計(jì)mat原題含答案
- The Effect of the Binder Coverage on the Glass Fiber and Interface of Its Composites.pdf
- Study of Pan Based Carbon Fiber and Its Properties.pdf
- MAT261質(zhì)譜計(jì)數(shù)字系統(tǒng)的剖析與改造.pdf
- 蔥葉枯匍柄霉(Stemphylium botryosum)交配型基因MAT1-1、MAT1-2敲除載體的構(gòu)建及遺傳轉(zhuǎn)化系統(tǒng)的建立.pdf
- Relationship Between Fiber Properties and Rotor Spun Yarn Strength.pdf
- effects of grain refining and modification on mechanical properties and microstructures of multielem
評(píng)論
0/150
提交評(píng)論