The effects of a number of parameters on the fatigue characteristics of a bolted graphite/epoxy composite laminate are investigated. In particular, tests were per formed in order to study the influence of three independent parameters; applied stress level, orientation of the outer layer reinforcing filaments, and the bolt torque level on the fatigue life of a graphite/epoxy composite. Analysis of variance and censoring techniques were used to analyze the experimentally obtained data. Fatigue life data was determined to be adequately characterized by using a log-normal distribution.
Whitney, J.M.1981"Fatigue Characterization of Composite Materials,"Fatigue of Fibrous Composite Materials, ASTM STP723, pp 133-151
2.
Whitney, J.M.1983"A Residual Strength Degradation Model for Competing Failure Modes,"Long-Term Behavror of Composites, ASTM STP 813, T K O'Brien, ed , pp 225-245
3.
Sendeckyj, G.P.1981"Fitting Models to Composite Materials Fatigue Data,"Test Methods and Design Allowables for Fibrous Composites, ASTM STP734 , C C. Chamis, ed., pp. 245-260
4.
Talreja, R.1981. "Estimation of Weibull Parameters for Composite Material Strength and Fatigue Life Data,"Fatigue of Fibrous Composite Materials, ASTM STP723 , American Society for Testing and Materials , pp 291-311.
5.
Little, R.E.1990. "Optimal Stress Amplitude Selection in Estimating Median Fatigue Limits Using Small Samples,"Journal of Testing and Evaluation, 18(2).115-122
6.
Weibull, W.1961. Fatigue Testing and Analysis of ResultsNew York: Pergamon Press.
7.
Hahn, H.T. and R.Y. Kim.1976"Fatigue Behavior of a Composite Lammate,"Journal of Composite Materials, 10:156-180.
8.
Park, W.J. and R.Y. Kim.1982"Statistical Analysis of Composite Fatigue Life,"Progress in Science and Engineering of Composites , T Hayashi, K Kawata and S Umekawa, eds., pp 709-716
9.
Kim, R.Y. and W.J. Park1980"Proof Testing under Cyclic Tension-Tension Fatigue,"Journal of Composite Materials, 1469-79
10.
Yang, J.N.1977. "Fatigue and Residual Strength Degradation for Graphite/Epoxy Composites under Tension-Compression Cyclic Loading,"Journal of Composite Materials, 1219-39
11.
Yang, J.N. and C.T. Sun1980"Proof Test and Fatigue of Unnotched Composite Laminates,"Journal of Composite Materials, 14.168-176
12.
Yang, J.N. and D.L. Jones.1981. "Load Sequence Effects on the Fatigue Unnotched Composite Materials,"Fatigue of Fibrous Composite Materials, ASTM STP723, pp. 213-232
13.
. Yang, J.N. and S. Du.1983. 'An Exploratory Study into the Fatigue of Composites under Spectrum Loading,"Journal of Composite Materials , 17:511-526.
14.
Radhakrishnan, K.1984. "Fatigue and Reliability Evaluation of Unnotched Carbon Epoxy Laminates,"Journal of Composite Materials, 18:21-31
15.
Shimokawa, T. and Y. Hamaguchi.1982"Distributions of Fatigue Life and Fatigue Strength in Notched Specimens of a Carbon Eight-Harness Satin Laminate,"Progress in Science and Engineering of Composites, T Hayashi, K. Kawata and S Umekawa, eds , pp 717-725
16.
Poon, C.1987"Literature Review on the Design of Mechamcally Fastened Composite Joints."Behaviour and Analysis of Mechanically Fastened Joints in Composite Structures, AGARD-CP -427.
17.
Crews, J.H.1981. "Bolt-Bearing Fatigue of a Graphite Epoxy Laminate,"Joining of Composite Materials, ASTM STP 749, K T Kedward, ed , American Society for Testing and Materials, pp 131-144
18.
Mallick, P.K. , R.E. Little and J.W. Dunham1986"Fatigue of Bolted Continuous Fibre Sheet Molding Compound Composite-Metal Joints,"Fatigue in Mechanically Fastened Composite and Metallic Joints, ASTM STP927 .
19.
Little, R.E. and P.K. Mallick1990. "Fatigue of Bolted Joints in SMC-R18 Sheet Molding Compound Composites,"Journal of Composites Technology and Research, 12(3) 155-163
20.
Ramkumar, R.L. and E.W. Tossavainen1986"Strength and Lifetime of Bolted Laminates,"Fatigue in Mechanically Fastened Composite and Metallic Joints, ASTM STP 927, J M Potter, ed., Philadelphia, pp 251-273.
21.
Kam, C.Y.1981. "Bolt Hole Growth in Graphite-Epoxy Laminates for Clearance and Interference Fits When Subjected to Fatigue Loads," Fatigue of Fibrous Composite Materials, ASTM STP 723, American Society for Testing and Materials, pp 21-30.
22.
Schutz, D., J.J. Gerharz and E. Alschweig.1981"Fatigue Properties of Unnotched, Notched, and Jointed Specimens of a Graphite/Epoxy Composite," Fatigue of Fibrous Composite Materials, ASTM STP 723, American Society for Testing and Materials, pp. 31-47.
23.
Herrington, P.H. and M. Sabbaghian. In press "Effect of Radial Clearance Between Bolt and Washer on the Bearing Strength of Composite Bolted Joints,"Journal of Composite Materials.
24.
Herrington, P.H. and M. Sabbaghian.1991. "Factors Affecting the Friction Coefficients between Metallic Washers and Composite Surfaces,"Composites, 22(6)
25.
American Society for Testing and Materials.1987. "Standard Test Methods for Bearing Strength of Plastics," ASTM D 953-87, pp. 1-8.
26.
Neter, J., W. Wasserman and M. Kutner1985. Applied Linear Statistical Models, SecondEdition, R. D. Irwin, ed.
27.
Cohen, A.C.1959. "Simplified Estimators for the Normal Distribution When Samples Are Singly Censored or Truncated,"Technometrics , 1(3):217-237.
28.
Cohen, A.C.1961. "Tables for Maximum Likelihood Estimates: Singly Truncated and Singly Censored Samples,"Technometrics , 3(4):535-541.
29.
Lilliefors, H.W.1967. "On the Kolmogorov-Smirnov Test for Normality with Mean and Vanance Unknown,"Journal of the American Statistical Association, 62.399-402.
