Fracture and failure behavior of fabric‐reinforced all‐poly(propylene) composite (Curv®)

Abstract

The in-plane static fracture of a fabric reinforced all-poly(propylene) (all-PP, Curv 1 ) composite was studied at ambient temperature using the concept of the linear elastic fracture mechanics. The apparent fracture toughness was determined on single-edge notched tensile specimens (SEN-T) considering the maximum load. The related values did not differ much from those determined by the resistance curve (K R ) method. The crack growth, requested to construct the K R curves, was traced by the movement in the center of gravity of the cumulative amplitude of the located acoustic emission (AE) events. The quality of consolidation of the all-PP composite was reflected by the forcedisplacement curve (appearance of pop-in), course of the cumulative AE events during loading, extension and change of the estimated damage zone during fracture. The failure behavior was studied also by fractography and is discussed.

Single-polymer composites (SPCs): Status and future trends

“…Quality of the products was assessed by various destructive methods (different kind of mechanical loading) coupled with further in situ (such as acoustic emission [151,152] or post mortem (light and scanning electron microscopy) failure inspections so far. Non-destructive techniques were rarely used for quality management though ultrasonic testing [153] and X-ray micro computed tomography seems (Figure 8) to be the right tools [154].…”

Manufacturing of Self-Reinforced All-PP Composites

“…These elements include the presence of endless fibers (fiber pull-out or break), the layered structure (delamination) [6,25,30,77], the high macromolecular orientation (defibrillation of the fibers) and the ductility inherent to the basic fiber (plastic deformation) [36]. Additionally, these characteristics contribute to splinter-free composite failure [78] even at temperatures below freezing. This is especially advantageous for protective applications.…”

Single-Polymer Composites: Concepts, Realization and Outlook: Review

“…For the quality assurance of the SPC parts non-destructive techniques should be developed. Note that the acoustic emission methods, adapted so far [60][61], can be treated only as quasi non-destructive one. In this respect, tomography techniques may be the winners-cf.…”