Experimental evaluation of blanking and piercing of PVC based composite and hybrid laminates

Abstract

Blanking is one of the high speed processes to produce flat products from sheets economically. In order to expand this process to new materials, the blanking of polyvinyl chloride (PVC)/fiberglass thermoplastic composite laminates and composite/aluminum hybrid laminates was investigated. The laminates were produced by the film stacking procedure and then blanked by circular die and punches. The blanking process was done in two levels of clearance including 4% and 8% of the laminates thickness, two levels of punch speed including 40 mm/min and 200 mm/min and at two levels of temperature (room temperature and 80 °C) for both composite and hybrid laminates. The effects of the parameters on the maximum blanking force, cutting energy, and quality and precision of sheared edges were studied. Cutting mechanism for blanking in different conditions was explained. It was concluded that at room temperature, blanked composite and hybrid laminates had a high quality of sheared edges but at elevated temperature, although the maximum blanking force was reduced, the quality of sheared edge was reduced significantly.

Keywords

Composite laminate / Hybrid laminate / Blanking / Fiberglass / Polyvinyl chloride (PVC)

References

[1] Davey S, Das R, Cantwell WJ, Kalyanasundaram S. Forming studies of carbon fibre composite sheets in dome forming processes. Compos Struct, 2013, 97: 310-316.

[2] Sexton A, Cantwell W, Kalyanasundaram S. Stretch forming studies on a fibre metal laminate based on a self-reinforcing polypropylene composite. Compos Struct, 2012, 94: 431-437.

[3] Sinmazçelik T, Avcu E, Özgür Bora M, Çoban O. A review: Fibre metal laminates, background, bonding types and applied test methods. Mater Des, 2011, 32: 3671-3685.

[4] Wu W, Abliz D, Jiang B, Ziegmann G, Meiners D. A novel process for cost effective manufacturing of fiber metal laminate with textile reinforced pCBT composites and aluminum alloy. Compos Struct, 2014, 108: 172-180.

[5] Chang PY, Yeh PC, Yang JM. Fatigue crack initiation in hybrid boron/glass/aluminum fiber metal laminates. Mat Sci Eng A, 2008, 496: 273-280.

[6] Crammond G, Boyd SW, Dulieu-Barton JM. Evaluating the localised through-thickness load transfer and damage initiation in a composite joint using digital image correlation. Composites A, 2014, 61: 224-234.

[7] Komori K. Simulation of crack arrest in blanking using the node separation method. Int J Mech Sci, 2013, 68: 150-159.

[8] Falconnet E, Makich H, Chambert J, Monteil G, Picart P. Numerical and experimental analyses of punch wear in the blanking of copper alloy thin sheet. Wear, 2012, 296: 598-606.

[9] Xu J, Guo B, Wang C, Shan D. Blanking clearance and grain size effects on micro deformation behavior and fracture in micro-blanking of brass foil. Int J Machh Tool Manuf, 2012, 60: 27-34.

[10] Yokoi H, Nakagawa T, Kudo H. Precision piercing and blanking of fiber reinforced plastics by vibro-punching. Ann CIRP, 1983, 32: 173-176.

[11] Fratini L, Ruisi VF. Self-piercing riveting for aluminium alloys-composites hybrid joints. Int J Adv Manuf Technol, 2009, 43: 61-66.

[12] Kroll L, Mueller S, Mauermann R, Gruetzner R (2011) Strength of self-piercing riveted joints for CFRP/aluminium sheets. In: 18th International conference on composite materials (ICCM/18), South Korea, 21–26 Aug 2011

[13] Ueda M, Miyake S, Hasegawa H, Hirano Y. Instantaneous mechanical fastening of quasi-isotropic CFRP laminates by a self-piercing rivet. Compos Struct, 2012, 94: 3388-3393.

[14] Luo H, Xiong G, Yang Z, Raman SR, Li Q, Ma C, Li D, Wang Z, Wan Y. Preparation of three-dimensional braided carbon fiber-reinforced PEEK composites for potential load-bearing bone fixations. Part I. Mechanical properties and cytocompatibility. J Mech Behav Biomed Mater, 2014, 29: 103-113.

[15] Sadighi M, Rabizadeh E, Kermansaravi F. Effects of laminate sequencing on thermoforming of thermoplastic matrix composites. J Mater Process Technol, 2008, 201: 725-730.

[16] Slavic J, Bolka S, Bratus V, Boltezar M. A novel laboratory blanking apparatus for the experimental identification of blanking parameters. J Mater Process Technol, 2014, 214: 507-513.

[17] Fang G, Zeng P, Lou L. Finite element simulation of the effect of clearance on the forming quality in the blanking process. J Mater Process Technol, 2002, 122: 249-254.

[18] Kwak TS, Kim YJ, Bae WB. Finite element analysis on the effect of die clearance on shear planes in fine blanking. J Mater Process Technol, 2002, 130–131: 462-468.

[19] Pawlikowski M. Non-linear approach in visco-hyperelastic constitutive modelling of polyurethane nanocomposite. Mech Time Depend Mat, 2014, 18(1): 1-20.

[20] So H, Fabmann D, Hoffmann H, Golle R, Schaper M. An investigation of the blanking process of the quenchable boron alloyed steel 22MnB5 before and after hot stamping process. J Mater Process Technol, 2012, 212: 437-449.