A numerically efficient approach for the prediction of consecutive growth of delaminations with curved fronts is developed. The approach is based on the assumption that the delamination grows from its current front to a predefined advanced front and that the delamination front remains smooth during the entire growth process. For computation of the load required to propagate the delamination the...

Abstract The axial compressive bearing capacity, failure modes, and mechanisms of carbon fiber-reinforced aluminum laminate (CARALL) columns with single-channel cross sections were studied in detail. In this study, two types short CARALL specimens a 5/4 configuration first fabricated using 2024-T3 alloy different fiber orientations ([0°/90°/0°] 3 , [45°/0°/−45°] ) via pressure-molding thermal-c...

Cemented tailings backfill (CTB) is continually practiced in a large number of metallic mines for re-filling underground ore extraction areas. Re-filling these areas can boost the security mining teams during construction. Hence, CTB’s durability/ductility extremely vital to ensure safety entire mine. In this study, layered-fiber-reinforced CTB (LFR-CTB) was manufactured using polypropylene fib...

We argue that basic psychological needs theory (BPNT) offers impetus to the value of mental toughness as a mechanism for optimizing human functioning. We hypothesized that psychological needs satisfaction (thwarting) would be associated with higher (lower) levels of mental toughness, positive affect, and performance and lower (higher) levels of negative affect. We also expected that mental toug...

Interlaminar failure of bonded composite structures is quite often. Nowadays there a lot lightweight high reliability carbon or glass fiber (CFRP GFRP) reinforced polymer constructions with rods. In order to better understand the delamination processes rods, analytical equations were analyzed. Later, mode I interlaminar experiments CFRP rods 3x3 mm performed and fracture toughness GIC = 135 J/m...

Abstract In this work, a novel binary hybrid woven carbon nanotube (CNT) tape/copper wire fiber reinforced epoxy resin composite is prepared. The mode I interlaminar fracture toughness ( G IC ) employed to critically evaluate the delamination performance. A comparison of value with that confirms incorporating CNT tapes and copper wires into increases by 263%. transverse through-thickness direct...

Modeling of crashworthy composite structures is limited by the inability of current generations of finite element crash codes to effectively model certain critical failure modes, such as delamination. Previous efforts to model delamination and debonding failure modes using crash codes have typically relied on ad hoc failure criteria and quasistatic fracture data. Improvements to these modeling ...

the use of methods employed for estimating the strength and toughness of composites reduces the trial-and-error in their design. the strength of interface between reinforcement and matrix and the effective surface of pulled-out particles have great influences on toughness and strength of these composites. in this study, a model was proposed to estimate the interface strength and matrix strength...