Paper Title :Evaluation of Flexural Stiffness for the Lightweight Polymer Foam Core Sandwich Structures
Author :Cagri Uzay, Durmus Can Acer, Necdet Geren, Ahmet Cetin
Article Citation :Cagri Uzay ,Durmus Can Acer ,Necdet Geren ,Ahmet Cetin ,
(2018 ) " Evaluation of Flexural Stiffness for the Lightweight Polymer Foam Core Sandwich Structures " ,
International Journal of Mechanical and Production Engineering (IJMPE) ,
pp. 36-40,
Volume-6,Issue-9
Abstract : Composite sandwiches are the multi-layer structural members that can be designed with vast variety of materials
to obtain desired physical and mechanical properties. Very high strength to weight ratio, good impact and corrosion
resistance, heat and acoustic insulation are the main advantages of the composite sandwich structures. Besides these,
depending upon the core and face sheet materials it also provides superior flexural stiffness. However, the evaluation of the
flexural stiffness of the sandwich structures is not based on a common standard and the calculations have been carried out
according to the sandwich handbooks’ formulations which are related to cumulative summation of each layer stiffness. In
this study, the flexural stiffness of a sandwich having lightweight polymer foam core (48 kg/m3 PVC) and carbon fiber
facings (3K woven plain, 200 g/m2) was evaluated with the aid of ASTM D7250/D7250M – 06 Standard. The composite
sandwiches manufactured by vacuum bagging method were tested considering two different loading configurations as
indicated in ASTM Standard under three-point bending loading. The span length was first determined as 150 mm and then
200 mm, respectively. The use of ASTM D7250 Standard approach eliminates additional tests for determining the young
modulus of the core and facings and directly helps to calculate flexural stiffness considering two different loading
configurations.
Index Terms: Sandwich structures, flexural stiffness, three-point bending test, ASTM D7250 Standard.
Type : Research paper
Published : Volume-6,Issue-9
DOIONLINE NO - IJMPE-IRAJ-DOIONLINE-13548
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Published on 2018-11-20 |
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