A study on abrasive wear characteristics of side plate of FRP ship

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A study on abrasive wear characteristics of side plate of FRP ship

Byung Tak K IM and Sung Wi K OH *

School of Mechanical Engineering, Pukyong National University, Busan 608 739, Korea

Generally the side plate materials of FRP ship are composed of glass fiber and unsaturated polyester resin composites(GFRP composites). In this study, the effect of applied load and sliding speed on friction and wear characteristics of these materials were investigated at ambient temperature by pin-on-disc friction test.

The cumulative wear volume, friction coefficient and wear rate of these materials for SiC abrasive paper were determined experimentally. The cumulative wear volume showed a tendency to increase nonlinearly with increase of sliding distance and was dependent on applied load and sliding speed for these composites.

The friction coefficient of GFRP composites was increased as applied load increased at same sliding speed in wear test. It was verified by SEM photograph of worn surface that major failure mechanisms were microfracture, deformation of resin, cutting and cracking.

Key words : Abrasive wear, Wear characteristics, SiC paper, Cumulative wear volume, Friction coefficient

* Corresponding author: [email protected], Tel: 82-51-629-6192, Fax: 82-51-629-6188

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SiC (3M) 80mm,

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SiC 9, 15, 30 μm

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10N, 20N 30N, 0.1m/s, 0.3m/s, 0.6m/s

1000m .

50m 100m

200m 1000m

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10, 20, 30N

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Ravikiran and Jahanmir(2001)

Chand et al.(2000) .

Fig. 1. Photograph of specimen and stainless disk bonded SiC paper.

Fig. 2. Variation of wear volume as a function of sliding distance for the composites tested on 9μμm SiC paper at sliding speed of 0.1 m/s and applied load of 10, 20, 30N.

4

3 2

1

0 Wear volume(mm

)

0 200 400 600 800 1000

0.1m/s, 9μm __ __ : 10N __ __ : 20N __ __ : 30N

Sliding distance(m)

Fig. 3. Variation of wear volume as a function of sliding distance for the composites tested on 9μμm SiC paper at sliding speed of 0.3 m/s and applied load of 10, 20, 30N.

5

4

3 2

1 0 Wear volume(mm

)

0 200 400 600 800 1000

0.3m/s, 9μm __ __ : 10N __ __ : 20N __ __ : 30N

Sliding distance(m)

0.3m/s Fig. 2

Fig. 3

. 0.3m/s

10N 20N

.

Fig. 4 10N, SiC

9 μm

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, 0.3m/s 0.6m/s

. Fig. 5

10N

20N, 30N

. Fig. 6 FRP

0.1m/s, SiC 9 μm

. 200m

400m

.

.

Fig. 7 0.6m/s, SiC

9 μm Fig. 4. Variation of wear volume as a function of sliding

distance for the composites tested on 9μμm SiC paper at applied load 10N and sliding speed of 0.1, 0.3, 0.6 m/s.

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4

3

2

1

0 Wear volume(mm

)

0 200 400 600 800 1000

10N, 9 μm __ __ : 0.1m/s __ __ : 0.3m/s __ __ : 0.6m/s

Sliding distance(m)

Fig. 5. Variation of wear volume as a function of applied load for the composites tested on 9μμm SiC paper at sliding speed of 0.1, 0.3, 0.6 m/s.

5

4

3

2

1

0 Wear volume(mm

)

0 10 20 30 40

__ __ : 0.1m/s __ __ : 0.3m/s __ __ : 0.6m/s

Applied load(N)

Fig. 6. Variation of friction coefficient as a function of sliding distance for the composites tested on 9μμm SiC paper at sliding speed of 0.1 m/s and applied load of 10, 20, 30N.

0.5

0.4

0.3

0.2

0.1

0.0

Friction coefficient

0 200 400 600 800 1000

0.1m/s, 9 μm __ __ : 10N __ __ : 20N __ __ : 30N

Sliding distance(m)

400m

Fig. 6 .

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, Fig. 8 20N

, SiC

9 μm

. 400m

.

Fig. 9 0.3m/s, 9 μm SiC

. Fig. 7. Variation of friction coefficient as a function of

sliding distance for the composites tested on 9 μμm SiC paper at sliding speed of 0.6 m/s and applied load of 10, 20, 30N.

0.4

0.3

0.2

0.1

0.0

Friction coefficient

0 200 400 600 800 1000

0.6m/s, 9μm __ __ : 10N __ __ : 20N __ __ : 30N

Sliding distance(m)

Fig. 8. Variation of friction coefficient as a function of sliding distance for the composites tested on 9μμm SiC paper at applied load 20N and sliding speed of 0.1, 0.3, 0.6 m/s.

0.5

0.4

0.3

0.2

0.1

0.0

Friction coefficient

0 200 400 600 800 1000

20N, 9μm __ __ : 0.1m/s __ __ : 0.3m/s __ __ : 0.6m/s

Sliding distance(m)

Fig. 9. Variation of wear rate as a function of sliding distance for the composites on 9 μμm SiC paper at sliding speed of 0.3 m/s and applied load of 10, 20, 30N.

2.0

1.5

1.0

0.5

0.0 Wear volume( 10

m

/m)

0 200 400 600 800 1000

0.3m/s, 9μm __ __ : 10N __ __ : 20N __ __ : 30N

Sliding distance(m)

Fig. 10. Variation of wear rate as a function of sliding distance for the composites tested on 9 μμm SiC paper at sliding speed of 0.6 m/s and applied load of 10, 20, 30N.

2.5

2.0

1.5

1.0

0.5

0.0 Wear volume( 10

m

/m)

0 200 400 600 800 1000

0.6m/s, 9μm __ __ : 10N __ __ : 20N __ __ : 30N

Sliding distance(m)

.

. Fig. 10 0.6m/s,

SiC 9 μm

. Fig. 11

30N, 9 μm SiC

.

, CFRP

(Koh et al., 2006).

Fig. 12 GFRP

. 50m

SEM . Fig.

12(a) 0.1m/s, 10N

. (micorcrack)

(microfracture) ,

, (microcutting)

. 20N

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(Fig. 12(b) ).

30N Fig. 12(c)

. Fig.

12(d) 10N

0.6m/s

.

FRP SiC

Fig. 11. Variation of wear rate as a function of sliding distance for the composites tested on 9μμm SiC paper at applied load of 30N and sliding speed of 0.1, 0.3, 0.6m/s.

2.5

2.0

1.5

1.0

0.5

0.0 Wear rate( 10

m

/m)

0 200 400 600 800 1000

30N, 9 μm __ __ : 0.1m/s __ __ : 0.3m/s __ __ : 0.6m/s

Sliding distance(m)

Fig. 12. SEM photographs of worn surface for the composites on each test condition at sliding distance 50m.

(a) 0.1m/s, 10N (b) 0.1m/s, 20N

(c) 0.1m/s, 30N (d) 0.6m/s, 10N

. FRP

,

.

400m

,

.

,

.

, , (cutting)

(cracking)

SEM .

2006

(PK 2006 8500)

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