Sage Journals: Discover world-class research

Abstract

Depth sensing indentation (DSI) has been used to investigate the mechanical properties of the epoxy based resin SL7580, which was manufactured by the stereolithography (SL) process. Post-processing techniques used in the SL process have been studied and their influence on mechanical properties determined. Depth sensing indentation has been used to investigate differences in the polymerisation process in the border scan (edge) and the hatch scan (centre) areas. These experiments showed a higher scatter in the indentation hardness at the edge of the sample than in the centre. This was attributed to the higher surface roughness at the edges, as measured using atomic force microscopy (AFM). Changes in mechanical properties with respect to time were also observed and these were attributed to post-curing of the SL7580. The curing kinetics was investigated using differential scanning calorimetry (DSC) and found to fit a simple mechanistic model. The predicted degree of cure was found to correlate well with the measured indentation hardness and modulus and a simple method of predicting the variation in mechanical properties with time is proposed.

Keywords

NANOINDENTATION EPOXY DSC AFM STEREOLITHOGRAPHY

Get full access to this article

View all access options for this article.

References

Cooper

K. G.

: ‘Rapid prototyping technology: selection and application’; 2001, New York, Marcel Dekker Inc.

Hague

R. J.

, Mansour

, Saleh

and Harris

: J. Mater. Sci. , 2004, 39, 2457–2464.

Hague

R. J.

, Campbell

R. I.

and Dickens

P. M.

: Proc. Inst. Mech. Eng. C , 2003, 217C, 25–30.

Jacobs

P. F.

: ‘Stereolithography and other RP&M technologies’; 1996, Dearborn, MI, Society of Manufacturing Engineering.

Available at: www.huntsman.com

Pharr

G. M.

: Mater. Sci. Eng. A , 1998, A253, 151-159.

Hertz

: J. Reine Angew. Math. , 1881, 92, 156–171.

Hertz

: J. Reine Angew. Math. , 1882, 61, 410.

Oliver

W. C.

and Pharr

G. M.

: J. Mater. Res. , 1992, 7, (4), 1564–1583.

10.

Doerner

M. F.

and Nix

W. D.

: J. Mater. Res. , 1986, 1, (4), 601–609.

11.

Fischer-Cripps

A. C.

: Nanoindentation'; 2002, New York, Springer-Verlag.

12.

Ward

I. M.

: ‘Mechanical properties of solid polymers’; 1983, New York, John Wiley and Sons.

13.

Ward

I. M.

and Hadley

D. W.

: ‘An introduction to the mechanical properties of solid polymers’: 1993, New York, John Wiley and Sons.

14.

Ward

I. M.

: J. Mater. Set , 1971, 6, 1397–1417.

15.

Miller

: ‘Introduction to plastics and composites’; 1996, New York, Marcel Dekker Inc.

16.

Briscoe

B. J.

, Sebastian

K. S.

and Sinha

S. K.

: Philos. Mag. A , 1996, 74A, (5), 1159–1169.

17.

Lucas

B. N.

: in ‘Thin-films — stresses and mechanical properties VII 505’, (ed. Cammarata

R. C.

et al), 97;1998, Pittsburgh, PA, Materials Research Society.

18.

Zheng

and Ashcroft

I. A.

: Int. J. Adhes. A dhes. , 2005, 25, (1), 67–76.

19.

‘Metallic materials-instrumented indentation test for hardness and materials parameters’, ISO 14577, ISO, Geneva, Switzerland, 2002.

20.

Jacobs

P. F.

: ‘Rapid prototyping and manufacturing, fundamentals of stereolithography’, Chapter 9, 221-247; 1992, Dearborn, MI, Society of Manufacturing Engineers.

21.

Ullett

J. S.

, Schultz

J. W.

and Chartoff

R. P.

: Rapid Prototyp. J , 2000, 6, (1), 8–17.

22.

Halley

P. J.

and Mackay

M. E.

: Polym. Eng. Set , 1996, 36, 593–608.

23.

Karkanas

P. I.

and Partridge

I. K.

: J. Appl. Polym. Set , 2000, 77, 1419–1431.

Investigation of stereolithography material by depth sensing indentation and differential scanning calorimetry

Abstract

Keywords

Get full access to this article

References