tailieunhanh - Engineered Interfaces in Fiber Reinforced Composites Part 8

Tham khảo tài liệu 'engineered interfaces in fiber reinforced composites part 8', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Fig. . Comparison between the compressive and tensile a strengths and b moduli of carbon fiber-epoxy matrix composites with three types of fiber surface condition. AU-4 without surface treatment AS-4 with surface treatment AS-4C with coating of pure epoxy after surface treatment. After Drzal and Madhukar 1993 . cross-sectional area of the specimen is under relatively uniform tension. The interlaminar in-plane shear strength values obtained from these shear tests are consistent with each other within experimental scatter as shown in Fig. . A good correlation of mode I interlaminar fracture toughness with interface bond quality is shown in Table . An increase in interfacial bond strength causes a slight improvement in mode I interlaminar fracture toughness. Its sensitivity is quite similar to that of transverse tensile strength which is expected as one can envisage from the similar transverse tensile stress dominating the failure process in both the test methods. One of the most dominant failure mechanisms responsible for the Chapter 5. Surface treatments of fibers and effects on composite properties 195 Table Summary of off-axis properties of carbon fiber-828 mPDA epoxy matrix composites with different fiber surface treatments11 Off-axis properties AU-4 fiber AS-4 fiber AS-4C fi iber Transverse tensile strength MPa Transverse tensile modulus GPa Transverse flexural strength MPa Transverse flexural modulus GPa 45 js in-plane shear strength MPa 45 js in-plane shear modulus GPa losipescu in-plane shear strength MPa losipescu in-plane shear modulus GPa Short beam interlaminar shear strength MPa After Drzal and Madhukar 1993 . improved interlaminar fracture toughness is the matrix deformation enhanced by the strong interface

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