A continuum damage mechanics (CDM) meso-model was derived for both intraply and interply progressive failure behaviors of a 2D woven-fabric composite laminate under a transversely low velocity impact. An in-plane anisotropic damage constitutive model of a 2D woven composite ply was derived based on CDM within a thermodynamic framework, an elastic constitutive model with damage for the fibre dir...

The influence of in-plane fiber waviness on the first ply failure quasi-isotropic thermoplastic composite laminates was investigated. mode and stress at were studied by using a four-point bending test an end-loaded (ELB) test. experimental results confirm that no undesirable concentration due to load introduction occurred in ELB test, thereby supporting use this as alternative method measure fa...

Bellows are special structures that require high strength as well as good flexibility. The design, manufacture, and analysis of bellow tubes thus are more complicated. Test of bellows to understand their mechanical behavior, and to verify a design purpose finite element program is needed for practical use. In this paper, digital-image-correlation method is applied to measure the stiffness of si...

Fiber reinforced polymer (FRP) laminates are being used as external reinforcement for strengthening concrete members. The performance of unidirectional FRP laminates is highly dependent on fiber orientation with respect to applied load direction. In the case of fabrication by manual lay-up, it is possible to have fiber plies installed with improper orientation. In this project, the degradation ...

Abstract. Composite structures are considered as the auxiliary to conventional metallic materials. However, a thorough understanding of material behaviour is required replace materials in use with scientific evidence for design rather than designing based on high safety factor. The filament wound E-glass/epoxy pipes different helix angles exposed internal pressure studied. sample GFRP pipe name...

Thin-ply composites are gaining significant attention owing to their high damage resistance and ability enhance design flexibility in a composite structure. Herein we proposed mechanics model considering diffuse discrete ply damages thin-ply laminates for mesoscale simulation. To investigate the effects of thickness on evolution, loading unloading tests were conducted using cross-ply, angle-ply...

In order to study the mechanical properties of ZT7G/LT-03A carbon fiber reinforced composite bolted joints, single-bolt double-lap joints tests were carried out with 3 kinds ply and width, effects different ratios, width diameter ratios on failure load mode analyzed. Then, process specimens was simulated by using progressive damage analysis method. The model are consistent that specimen, which ...

We study the transverse cracking of the 90◦ ply in [0/90]S cross-ply laminates by means of a discrete element method. To model the 90◦ ply a two-dimensional triangular lattice of springs is constructed where nodes of the lattice model fibers, and springs with random breaking thresholds represent the disordered matrix material in between. The spring-lattice is coupled by interface springs to two...

The structural analysis of an infinite unsymmetric laminated composite Timoshenko beam over Pasternak viscoelastic foundation under moving load is studied. The beam is subjected to a travelling concentrated load. Closed form steady state solutions, based on the first-order shear deformation theory (FSDT) are developed. In this analysis, the effect of bend-twist coupling is also evaluated. Selec...