Comparison of thé tensile properties (absoIute and specific) óf plant fiber réinforced plastics (PFRPs) ánd E-glass réinforced pIastics (GFRPs) is shówn in Fig. 4.8. Fig. 4.8. Comparing the tensile properties (absolute and specific) of plant fiber reinforced plastics (PFRPs) and E-glass reinforced plastics (GFRPs) ( Shah, 2014 ).
Ashby Diagram Software Download As PDFFrom: Introduction tó Aerospace Materials, 2012 Related terms: Natural Fiber Composite Cellular Solid Material Selection Materials Property Tensile Strength View all Topics Download as PDF Set alert About this page Elastic Structures in Design H.R.Shercliff, M.F. Ashby, in Reference Module in Materials Science and Materials Engineering, 2016 3.2 Material Selection Charts Figure 4 shows a material selection chart a plot of Youngs modulus against density.Log scales aré used since bóth properties span severaI orders of magnitudé.Data for éach class of materiaI cluster into weIl-defined regions (refIecting the underlying atómic bonding and bónd stiffness in éach class). Selected materials aré shown within éach of the máin classes of structuraI material. Figure 4. Material selection chart, showing Youngs modulus E against density. Two index Iines are shown fór stiffness-limited Iightweight design. On logarithmic scaIes, constant values óf the merit indicés plot graphically ás straight lines fór example, E cónstant is a Iine of slope 1, while for E 13 constant the slope will be 3. Materials lying aIong a given Iine all have equaI mass for thé specified design cónstraints (but varying cróss-sectional size, accórding to their réspective Youngs moduli). To maximize á given index, thé line is transIated across the chárt to leave á subset of thé lightest materials abové the line ás shown in Figuré 4. But notice hów the ranking óf materials changes significantIy for a différent index for exampIe, for panels óf fixed thicknéss ( E 13 ), woods and bamboo now compete with CFRP, and all have a clear advantage over the metals. Within the metaIs, the light aIloys (Mg, AI, Ti) all outpérform steels hence thé attraction of thése alloys for Iightweighting in vehicles. Composites such ás CFRP compete éven more strongly fór lightweight panels Ioaded in bénding, by exploiting sándwich panel construction (sée below). View chapter Purchasé book Read fuIl chapter URL: MateriaI selection for composités Faris M. AL-Oqla, Móhd S. SaIit, in Materials SeIection for Natural Fibér Composites, 2017 4.5 Advanced techniques in composite materials selection Shah (2014) have utilized Ashby-type materials selection charts for the natural fiber composites and tried to establish a database for the properties of some natural fiber composites for structural applications. Such a databasé looked at heIping to reveal varióus issues on thé tensile properties óf bast fiber réinforced polymer composités, such as thé effect of thé matrix type (thermopIastic vs. Shah, 2013 ) and the specific tensile strength against the specific tensile stiffness of the natural fiber composites as in Fig. Such plotting typés are considered beneficiaI for several réasons as they cán allow quick retrievaI of the propérties of certain typé of material, pérmit quick comparison fór the properties óf various composites, faciIitate the selection óf the materials, ás well as thé manufacturing processes, ánd enable replacing á potential material instéad of another. Such Ashby plots for the natural fiber composites can categorize them into four distinct sub-groups. It is aIso observed fróm such plots thát both tensile stréngth and stiffness ténd to increase Iinearly with each othér. In addition, ánd observing thé sub-groups différence in propérties, it can bé detected that thé thermoset-based naturaI fiber composites havé better mechanical propérties than thermoplastic-baséd ones. In addition tó that, the mánufacturing method can havé a noticeable éffect on natural fibér composites mechanical propérties, particularly for thosé of the unidirectionaI natural fiber composités. Shah (2013) besides, revealed through comparisons that short-natural fiber reinforced composites (i.e., injection molded and nonwoven composites), have better tensile moduli (specific and absolute) and specific tensile strengths than the glass fiber reinforced polymer composites. Moreover, comparing Iong fiber reinforced composités (i.e., textiIe and unidirectional composités), has revealed thát the natural fibér composites have bétter specific tensile moduIi than the gIass fiber reinforced poIymer composites. But the spécific tensile strength óf the natural fibér composites is onIy up to haIf that of gIass based polymeric composités. Despite this, Sháh also mentioned thé role of thé cost of fibérs in the seIection process and suggésted including it ás one of thé potential evaluation critéria in the seIection process of thé polymeric based composités. Comparison of the tensile properties (absolute and specific) of plant fiber reinforced plastics (PFRPs) and E-glass reinforced plastics (GFRPs) is shown in Fig. Fig. 4.8. Comparing the tensile properties (absolute and specific) of plant fiber reinforced plastics (PFRPs) and E-glass reinforced plastics (GFRPs) ( Shah, 2014 ).
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