... ultimate strength and the modulus of elasticity of the tested laminate with or without embedded PFCS are within 7% of each other. The stress–life (S-N) curves obtained from fatigue tests indicates that the fatigue lives and strengths with and without the PFCS are close to each other as well. From short...

.../epoxy and glass/epoxy laminated composites as well as a steel specimen, the distribution of released strains on the top and the back surfaces due to the shear stresses is calculated using finite element method and compared with those due to the residual normal stress. The results show that on the back...

... ratio of impact contact area over cross-section area. Of all the parameters tested the thickness of the unidirectional laminate on the specific energy absorption does not appear to have a significant effect at the studied thickness ratios. References 1 Hull , D. , 1988 , “ Energy Absorbing...

... integration internal stresses laminates mesh generation Cohesive element delamination fracture laminates Prediction of residual strength and fatigue life of composite structures requires computational schemes that account for all failure modes and their interactions. Significant progress...

...Levent Aktas; Duane P. Bauman; Scott T. Bowen; Mrinal C. Saha; M. Cengiz Altan The first part of this paper characterizes the effect of tooling and process parameters such as the length of distribution media used in vacuum assisted resin transfer molding (VARTM) of composite laminates. To achieve...

...Volkan Eskizeybek; Ahmet Avci; Ahmet Akdemir; Ömer Sinan Şahin Fatigue crack growth and related damage mechanisms were investigated experimentally in a stainless steel/aluminum laminated composite with middle through thickness crack, and two different fracture mechanics approaches applied...

... in composite laminates is very difficult. The choice between failure criteria is complex, and there is a lack of experimental study to validate the result obtained partly because the biaxial tests are still difficult to perform. This work employs a mixed methodology based on a theoretical and an experimental...

..., and the analyses have to be newly conducted for the study of post-buckling behavior of laminated beams. Many papers treating the local buckling of one-dimensional or circular delaminations in beams or plates caused by uniaxial or axisymmetric in-plane compressive loadings ( 7 8 9 10 11 12 ) have been...

... economical, hybrid composite laminate. For each response measured (flexural capacity, stiffness, and ductility), at least one hybrid configuration displayed mechanical properties comparable to all carbon composite laminates. The results indicate that hybrid composite plates manufactured using 3k...

...Christos G. Papakonstantinou; Konstantinos Katakalos The aim of this paper was to investigate the tensile and flexural properties of hybrid laminates made with titanium sheets and high modulus carbon fiber composites. Grade II titanium was used, which exhibits great high-temperature performance...

...Suhasini Gururaja; Mamidala Ramulu Unidirectional fiber-reinforced plastic (UD-FRP) laminates have been modeled previously as an equivalent quasihomogeneous monoclinic half-space subjected to an inclined line load on the surface using Lekhnitskii’s formulation simulating the orthogonal edge...

... damage, a clearly visible impact damage, and a penetration damage. After the impact test, constant-amplitude tension-tension fatigue was done to delineate the modes of damage initiation and growth and the effect of damage on fatigue life and residual strength. The results showed that GLARE laminates...

...S. Bernhardt; M. Ramulu; A. S. Kobayashi The low-velocity impact response of a hybrid titanium composite laminate, known as TiGr , was compared to that of graphite/epoxy composite. The TiGr material comprised of two outer plies of titanium foil surrounding a composite core. The composite core...

.... The basic configuration of this system is composed of two separate components—namely, an inner PMC sandwich panel and outer damping panels. The inner PMC sandwich infill consists of two fiber-reinforced polymer (FRP) laminates with Divincell® H core, and outer damping panels are made of FRP laminate plates...

...A. Birur; A. Gupta; J. Raghavan Evolution of various damage modes with time, in multidirectional laminates of a polymer composite (Hexcel F263-7/T300) subjected to a constant load, was experimentally studied and correlated to experimental creep rupture results to understand the influence...

...Brajabandhu Pradhan; Saroja Kanta Panda The present study encompasses the thermoelastic effect of material anisotropy and curing stresses on interlaminar embedded elliptical delamination fracture characteristics in multiply laminated fiber-reinforced polymeric (FRP) composites. Two sets of full...

... composites laminates sandwich structures plates (structures) beams (structures) fracture mechanics elasticity brittle fracture cracks notch strength According to current practice and all textbooks, sandwich plates and shells are generally designed under the hypothesis...

..., and the facesheets are woven glass-epoxy laminates, scaled by increasing the number of plies. The test results reveal a size effect on the mean nominal strength, which is strong enough to require consideration in design. The size effect observed is fitted with the size effect law of the energetic (deterministic...

...S. G. Kalarikkal; B. V. Sankar; P. G. Ifju The research presented in this paper is an effort to better understand the interlaminar fracture behavior of graphite/epoxy composite laminates in cryogenic conditions. Double cantilever beam tests were performed on different types of specimens, at room...

.... Pseudo-quasi-isotropic [0/+45/90/−45/0]s and angle ply laminate [±45]2s samples from each level of postcure are examined at 1, 10, 30, 100, and 300 days after postcure in order to track strength, stiffness, failure strain, creep, and fatigue performance as functions of time. In parallel, the matrix...