Modeling of compressive failure in fiber reinforced composites

✍ Scribed by K. Niu; R. Talreja

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 462 KB
• Volume: 37
• Category: Article
• ISSN: 0020-7683
• DOI: 10.1016/s0020-7683(99)00010-4

✦ Synopsis

The classical results of compressive strength in ®ber reinforced composites are brie¯y reviewed. The microbuckling analysis by Rosen (1965) and the Argon-Budiansky analysis for kink band formation (Argon, 1972;Budiansky 1983) are discussed and their results are rederived by using a new generalized Timoshenko beam model which is developed for a two-dimensional periodic matrix±®ber±matrix laminate. Introducing a `shear hinge' to simulate a kink band and using the method of split rigidities it is shown that not only an initial ®ber misalignment but also any misalignment in the loading system can aect the critical stress for kinking. A new mechanism based on shear instability of matrix is proposed for kink band formation and a simple formula is then derived to predict the kink band angle. Finally, a criterion for matrix yielding combining axial compressive stress and transverse shear perturbation is applied to modify the Argon±Budiansky kinking formula.