Low velocity impact response of flax/polypropylene hybrid roving based woven fabric composites: Where does it stand with respect to GRPC?

In an attempt to increase the low-velocity impact response of natural fiber composites, a new hybrid intraply woven fabric based on flax and basalt fibers has been used to manufacture laminates with both thermoplastic and thermoset matrices. The matrix type (epoxy or polypropylene (PP) with or without a maleated coupling agent) significantly affected the absorbed energy and the damage mechanisms. The absorbed energy at perforation for PP-based composites was 90% and 50% higher than that of epoxy and compatibilized PP composites, respectively. The hybrid fiber architecture counteracted the influence of low transverse strength of flax fibers on impact response, irrespective of the matrix type. In thermoplastic laminates, the matrix plasticization delayed the onset of major damage during impact and allowed a better balance of quasi-static properties, energy absorption, peak force, and perforation energy compared to epoxy-based composites.

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Low velocity impact response of composites and fiber metal laminates with open holes

Journal of Composite Materials ◽

10.1177/0021998316653817 ◽

2016 ◽

Vol 51 (6) ◽

pp. 797-810 ◽

Cited By ~ 2

Author(s):

C Rubio-González ◽

E José-Trujillo ◽

F Chávez ◽

A Ruiz

Keyword(s):

Composite Plates ◽

Impact Response ◽

Woven Fabric ◽

Low Velocity Impact ◽

Critical Parameters ◽

Low Velocity ◽

Fiber Metal Laminates ◽

Velocity Impact ◽

Fiber Metal Laminate ◽

Fiber Metal

Low-velocity impact response of glass/epoxy composite plates and fiber metal laminates with and without holes is investigated. The critical parameters that affect the delamination characteristics of laminates are impact energy, holes separation distance, type and directionality of fibers. An experimental investigation has been conducted to evaluate the effect of the presence of holes and the incorporation of aluminum layers in the extent of delamination. The extent of damage introduced during the impact event was observed on images obtained from C-scan non-destructive ultrasonic technique. Results indicate that fiber metal laminate made with aluminum layers exhibits an improved dynamic response in comparison with that of conventional laminates. The beneficial effect of using aluminum layers to reduce the extent of delamination produced by impact loading especially on laminates with holes is demonstrated. Furthermore, fiber metal laminates show better load carrying capability than conventional composite plates. The better response of fiber metal laminate with multidirectional fabric in comparison with fiber metal laminate with woven fabric is also examined. These results may be useful to better design the location of holes in composite structures.

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Influence of Fiber Orientation and Fillers on Low Velocity Impact Response of the Fabric Reinforced Epoxy Composites

Applied Composite Materials ◽

10.1007/s10443-021-09910-1 ◽

2021 ◽

Author(s):

M. Bunea ◽

V. Bria ◽

F. S. Silva ◽

I. G. Bîrsan ◽

M. Buciumeanu

Keyword(s):

Fiber Orientation ◽

Impact Response ◽

Epoxy Composites ◽

Low Velocity Impact ◽

Low Velocity ◽

Velocity Impact

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Response and failure modes of biaxial warp-knitted flexible composite subject to low-velocity impact

Journal of Industrial Textiles ◽

10.1177/15280837211015477 ◽

2021 ◽

pp. 152808372110154

Author(s):

Ziyu Zhao ◽

Tianming Liu ◽

Pibo Ma

Keyword(s):

Impact Energy ◽

Linear Density ◽

Failure Modes ◽

Impact Response ◽

Low Velocity Impact ◽

Minor Effect ◽

Low Velocity ◽

Velocity Impact ◽

Flexible Composites ◽

The Impact

In this paper, biaxial warp-knitted fabrics were produced with different high tenacity polyester linear density and inserted yarns density. The low-velocity impact property of flexible composites made of polyurethane as matrix and biaxial warp-knitted fabric as reinforcement has been investigated. The effect of impactor shape and initial impact energy on the impact response of flexible composite is tested. The results show that the initial impact energy have minor effect on the impact response of the biaxial warp-knitted flexible composites. The impact resistance of flexible composite specimen increases with the increase of high tenacity polyester linear density and inserted yarns density. The damage morphology of flexible composite materials is completely different under different impactor shapes. The findings have theoretical and practical significance for the applications of biaxial warp-knitted flexible composite.

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