Average fiber tensile strength

Based on the same average fiber tensile strength model as that employed in Section 4.2.3, the fiber fragmentation criterion is derived in terms of the external stress, ffa(= (h = o er, for the partially debonded interface ... 

The individual fiber properties which contribute to the tensile properties of paper include the following (8) fiber tensile strength mean fiber length fiber cross-sectional area perimeter of the average fiber cross section density of the fibrous material fraction of the fiber area bonded in the sheet and the shear strength per unit area of fiber-to-fiber bonds. 

Ta b I e 6.1 Characteristic values for creep strength In unidirectional glass fiber reinforced UP [1015], [1016] 100 % corresponds to short-term strength 1,100 N/mm (average Initial tensile strength) for I hour based on short-term strength... 

Assume that the conductivity of a undirectional, continuous fiber-reinforced composite is a summation effect just like elastic modulus and tensile strength that is, an equation analogous to Eq. (5.88) can be used to describe the conductivity in the axial direction, and one analogous to (5.92) can be used for the transverse direction, where the modulus is replaced with the corresponding conductivity of the fiber and matrix phase. Perform the following calculations for an aluminum matrix composite reinforced with 40 vol% continuous, unidirectional AI2O3 fibers. Use average conductivity values from Appendix 8. 

However, other factors, particularly the presence of flaws, may limit the observed strength. From selected PAN based carbon fibers, Diefendorf and Tokarsky determined an experimental average value of (2y /Jtc) = 4650N /m (=56 psi ). Hence, the relationship between modulus and tensile strength at break, for PAN... 

Table 5.2-3. Average values for Density, Tensile Strength and Elasticity Modulus of Fibers.

Type of carbon fibers Average diameter (pm) Average length (mm) Specific gravity (20°C) Elastic modulus in tension (GPa) Tensile strength (MPa)... 

Examples of length of long natural cellulose fiber are shown in Table 3.19. Cross-sectional area for long cellulose fiber, listed in Table 3.19, vary within error margin (standard deviation) for all species, so that the average cross-sectional area for all of them can be expressed as 273 + 109 mc, or, more realistically, 300 100 mc. From those, hemp is the strongest one (in terms of tensile strength) and the stiffest one (in terms of tensile modulus) (Table 3.20). 

Glass Fiber, wt. % Average Particle Size, SSG Apparent Density, g/1 Shrinkage, /o Tensile Strength, MPa Break Elongation, /o... 

Run Temperature [°C] Hz Flow [l/min] MTS Flow [g/min] [Pa/Torr] Tensile Strength average [GPa] range Weight for 15.2 cm fiber [g] Coat- ing Thick- ness [pm] Fiber Agglo- mera- tion [%]... 

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