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Register a new userImprove the mechanical properties of unsaturated polyester reinforced with random fiber glass which used in the manufacture of wind turbine blade
تحسين الخواص الميكانيكية للبولي استر غير المشبع المدعم بألياف زجاجية عشوائية المستخدم في تصنيع شفرة عنفة ريحية
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نتيجة لتطور مجال استخدام المركّبات المدعمة بالألياف في التطبيقات العملية بشكل مستمر يهدف البحث الى دراسة تأثير نسبة المواد البيروكسيدية المضافة الى مادة البولي استر غير المشبع على خواص الشد لعينات محضرة من البولي الاستر غير المشبع المدعم بالألياف الزجاجية المستخدمة في تصنيع شفرات توربينات الرياح، و كذلك دراسة تأثير مدة تطبيق عمليات المعالجة الحرارية على تصلب البولي استر غير المشبع و خواص عملية الشد بعد تطبيق المعالجة الحرارية بهدف تحسين خواص هذه الشفرات. تم تحضير عينات اختبار تحتوي على نسب (1% - 1.5% - 2%) من المادة البيروكسيدية ميتيل ايتيل كيتون بيروكسيد MEKP و أظهرت نتائج الاختبار أن أفضل نسبة عند 1.5%. في حين أظهرت نتائج المعالجة الحرارية أن أفضل قيم لمقاومة الشد عند الانقطاع هي للعينات المعالجة لزمن قدره /48 hours/.
As a result of the development of the use of reinforced Composites with fibers in practical applications continuously, research aims to study the effect of proportion piroxide additives to unsaturated polyester resin on the tensile properties of the samples prepared from unsaturated polyester resin reinforced with glass fiber used in wind turbine blades manufacturing, and also studying the effect of for the application of heat treatment operations on the hardening of the unsaturated polyester and tensile properties after heat treatment process the application in order to improve the properties of these blades. Test samples were prepared containing ratios (1% - 1.5% - 2%) of methyl Etel ketone piroxide MEKP and test results showed that the best ratio at 1.5%. While the heat treatment results showed that the best values for tensile strength at break of the samples are treated to a time of / 48 hours /.
References used
K.SURESH BABU, N.V.SUBBA RAJU, M.SRINIVASA REDDY, D. NAGESWARA RAO THE MATERIAL SELECTION FOR TYPICAL WIND TURBINE BLADES USING A MADM APPROACH& ANALYSIS OF BLADES. SRKR Engineering College, Bhimavaram , June, 2006, 1-6
MISHNAEVSKY JR, L. composite materials in wind energy technology. University of Denmark, Roskild, Denmark, 2011, 11-24
XIA CAO, JAMES LEE. L. Effect of dual-initiator on low temperature curing of unsaturated polyester resins. Department of chemical Engineering, The Ohio State University, VOl 13,2005, 1-10
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This research includes an experimental study for the manufacture of
a composite material based on polymer (unsaturated polyester),
reinforced with random fiberglass at different weight fractions. By
suite, it has been studied some mechanical prope
rties of the models
manufactured, to determine the effect of glass fiber content on the
tensile strength, hardness and impact resistance. This study has
shown that the best results were for samples reinforced by 40%
fiberglass, where the tensile strength increased about 70%, hardness
up to 30%, and impact resistance about 43%. It will be observed
that the mechanical properties decrease clearly at 60% of weight
fraction of fiberglass. This fact can be related to the quantity of
unsaturated polyester become inadequate for recharge of the fibers,
which leads to weakness in the forces bonding in composite
materials.
This search aims to study the effect of additive materials ( Ethyl Methyl Keton
Peroxide MEKP , Cobalt Naphthenate ) at the important values of (stress-strain) curves
( stress and elongation at break ) for the preparing specimens from reinforced an
d nonreinforced
with fiber glass unsaturated polyester resin.
The result showed that the investigated parameters are clearly affected with using
additive materials and the optimum concentration for non-reinforced specimens which was
curing in room temperature was (1% MEKP + 1% Cobalt Naphthenate) and (0.8% MEKP
+ 1% Cobalt Naphthenate), and for reinforced specimens with fiber glass was:( 1% MEKP
+ 0.8% Cobalt Naphthenate) and ((0.2-0.4) % MEKP + 1% Cobalt Naphthenate).
The results showed also that it is possible to get the better values of tensile stress at
break when the specimens was curing in oven at 100 Cº and treated at this temperature for
15 min.
This research aims to study the effect of addition the filling materials (sodium aluminosilicate, Talc) to the unsaturated polyester(unsaturated polyester resign)(UPR) first, and unsaturated polyester reinforced by fiberglass (20%) secondly, Number o
f mechanical tests were done, they included (Tensile, Flexural Strength). The effect of addition of filling materials sodium aluminosilicate (SAS), Talc, and a mixture of sodium aluminosilicate and Talc to the unreinforced polyester with fiberglass was studied in the first step of the research, and the results showed that the best values were gotten when adding a mixture of ((SAS) and Talc) at ratio (10% SAS,5% Talc), where the tensile strength value raised up from (31.2 MPa) to (33 MPa), and the elastic module value also raised up from (2330 MPa) to (2750.5 MPa) , and the flexural strength value also raised up from (0.057 GPa) to (0.0729 GPa). The effect of addition of filling materials (sodium aluminosilicate, Talc, and a mixture of sodium aluminosilicate and Talc ) to the reinforced polyester with fiberglass (20%) was studied in the second step of the research, and the results showed that the best values were gotten when adding a mixture of ((SAS) and Talc) at ratio (5% SAS,5% Talc), where the tensile strength value raised up from (101.7 MPa) to (108.8 MPa), and the elastic module value also raised up from (5616 MPa) to (6367.9 MPa), and the flexural strength value raised up from (0.1203 GPa) to (0.1597 GPa).
In this research a study was carried out to evaluate the effect of
adding random distribution plastic waste fiber inside soil on the
geotechnical properties of clayey soil. The research is based on
experimental method through many stages.
In this paper an experimental investigation of unsaturated polyester(UPR) with
different weight fractions(2,4,5,7 )wt% of (Al2O3,MgO,TiO2) as powders ,has been done.
the identification of their flammability and fire resistance ranges are found out
. the time
needed to puncture the samples, the mass loss, the diameter variation ,and the flame effect
on the samples surface are measured. the samples were tested by Oxyacetylene flame using
a device which is designed in the Faculty of Mechanical and Electrical Engineering labs.
The results showed that (MgO) is the best one for its flammability and fire
resistance. The longest time before puncture , and the lowest mass loss were achieved by(
UPR+ 7% MgO) with(16% mass loss in 112 sec ), while pure UPR has ( 27% mass loss in
45 sec).
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