Potential sensitivity of the buckling behavior of cracked composite cylindrical shells to service life cracking is explored by carrying out linear buckling analysis. Computational models of cracked composite cylindrical shells are developed by exploiting a special meshing scheme in which the element size is reduced incrementally from the element size employed in the uncracked region by approach...

We present several algorithms suited for the generation and analysis of structures used in manufacturing laminate electromechanical devices. These devices may be fabricated by a family of related manufacturing processes such as printed-circuit MEMS (PC-MEMS) smart composite microstructures (SCM), or lamina emergent mechanisms (LEM), which, by utilizing multimaterial laminate composites, enables...

The paper looks into a specific route of incorporating nanodoped materials in dry preforms to enhance the electrical conductivity of the final infused carbon fibre reinforced epoxy laminate, without affecting mechanical room temperature (RT) and hot/wet (H/W) performances. The aim is to select suitable nanodoped polymeric carriers followed by an assessment of the manufacturing, electrical and m...

A damage detection technique, which does not rely on any past baseline signals, is proposed to assess damage in composite plates by using an enhanced time reversal method. A time reversal concept of modern acoustics has been adapted to guided-wave propagation to improve the delectability of local defects in composite structures. In particular, wavelet-based signal processing techniques have bee...

Thermal effects on the pin-bearing behavior of an IM7/PETI5 composite laminate are studied comprehensively. A hypothesis presents factors influencing a change in pin-bearing strength with a change in temperature for a given joint design. The factors include the change in the state of residual cure stress, the material properties, and the fastener fit with a change in temperature. Experiments ar...

The objective of the this research paper is to predict the deformation length of glass/epoxy composite laminates using Finite Element Analysis (FEA) and compare with the Universal Testing Machine (UTM) deformation results through the tensile load. The laminate was made by six layered glass fiber (in woven mat form) with epoxy as the binding medium by hand lay-up technique, cured at room tempera...

A typical aerospace composite component can be modeled on (at least) three different scales: (i) macroscale (structural level), (ii) mesoscale (laminate level), and (iii) microscale (the level of microconstituents). Additional scales can be introduced into the model. For example, the scale of material heterogeneity in each microphase, such as dislocations and grain boundaries, could be consider...

The question of the effective response of two-phase hybrid “fibrous-laminate” piezoelectric composites, with periodic microstructure, is adressed with two homogenization approaches: a full-field numerical scheme based on Fourier transform and a simplifying approach relying on a decoupled two-step homogenisation process. In the case of a two-phase epoxy/PZT composite, this latter is shown to ove...

The propagation of leaky Lamb waves in a plate consisting of a general balanced symmetric composite material is considered. The problem has been examined both analytically as well as experimentally. An exact solution for the dispersion equation was obtained. Numerical results for complex‐valued wavenumber were obtained for an isotropic material (aluminum) and a (0/903)s graphite/epoxy laminate....

The creation of reliable structural laminate composites for space applications requires precision design and manufacturing using an integrated, concurrent engineering approach. Since the final material characteristics are established at the same time the part or subassembly is fabricated, part design, fabrication development, and material characterization must proceed concurrently. Because comp...