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Abstract

This paper deals with the prediction of long-term strength of CFRP structure components based on the combined method of the strain invariant failure theory (SIFT) developed by Gosse and Christensen and the accelerated testing methodology (ATM) developed by Miyano and Nakada. The time—temperaturedependent master curves of SIFT critical parameters are constructed by tension and compression tests for the longitudinal and transverse directions of unidirectional CFRP under various temperatures based on the time-temperature superposition principle which holds for the viscoelastic modulus of matrix resin. These master curves can be used for predicting the long-term strength of composite structures with multi-directional laminations at any time, temperature. The long-term open-hole compression strength of the quasi-isotropic CFRP laminates is predicted using the master curves of SIFT critical parameters based on SIFT/ATM combined method and structural stress and strain analysis by finite element method. The applicability of SIFT/ATM combined method to predict the long-term strength of CFRP structures is experimentally confirmed.

Keywords

open-hole compression strength strain invariant failure theory accelerated testing methodology time—temperature dependence.

References

Aboudi, J. and Cederbaum, G. (1989). Analysis of Viscoelastic Laminated Composite Plates , Composite Structures, 12: 243-256.

Gates, T. (1992). Experimental Characterization Nonlinear Rate Dependent Behavior in Advanced Polymer Matrix Composites, Experimental Mechanics, 32: 68-73.

Miyano, Y. , Kanemitsu, M. , Kunio, T. and Kunh, H. (1986). Role of Matrix Resin on Fracture Strengths of Unidirectional CFRP, Journal of Composite Materials, 20: 520-538.

Miyano, Y. , Nakada, M. , McMurray, M.K. , Muki, R. and Muki, R. (1997). Prediction of Flexural Fatigue Strength of CFRP Composites under Arbitrary Frequency, Stress Ratio and Temperature, Journal of Composite Materials, 31: 619-638.

Miyano, Y. , Nakada, M. , Kudoh, H. and Muki, R. (1999). Prediction of Tensile Fatigue Life under Temperature Environment for Unidirectional CFRP, Adv. Composite Mater. , 8(3): 235-246.

Hongneng Cai , Toru Mizotani , Masayuki Nakada and Yasushi Miyano (2003). Time-Temperature Dependent Flexural Fatigue Behavior of Honeycomb Sandwich Composites, In: Proceedings of The 14th International Conference on Composite Materials (ICCM-14), 14-18 July, San Diego, California, USA.

Gosse, J.H. and Christensen, S. (2001). Strain Invariant Failure Criteria for Polymer in Composite Materials, Collection of Technical Papers-AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference, 1: 45-55.

Tay, T.E. , Liu, G. and Tan , V.B.C. (2006). Damage Progression in Open-hole Tension Laminates by the SIFT-EFM Approach , Journal of Composite Materials, 40: 971-992.

Tay, T.E. , Tan, V.B.C. and Tan , S.H.N. (2005). Element-Failure: An Alternative to Material Property Degradation Method for Progressive Damage in Composite Structures, Journal of Composite Materials, 39: 1659-1675.

10.

Je Hoon Oh , Kyo Kook Jin and Sung Kyu Ha (2006). Interfacial Strain Distribution of a Unidirectional Composite with Randomly Distributed Fibers under Transverse Loading, Journal of Composite Materials, 40: 759-778.

11.

Stephen, W.T. (2004). An Excel-Based Micro-Macromechanics Analysis Software: Super Mic-Mac, In: The Eighth Composites Durability Workshop (CDW8), 26 March, Zaragoza, Spain.

12.

Hongneng Cai , Toshihiko Murase , Masayuki Nakada and Yasushi Miyano (2004). Time-Temperature Dependent Strength of CFRP Laminate Based on Strain Invariant Failure Theory, JCOM:JSMS Composites 33, pp. 80-84, 17-19 March, Kyoto.

13.

Hart-Smith, L.J. and Gosse, J.H. (2003). Formulation of Fiber-Failure Criteria for Fiber-Polymer Composites in Terms of Strain Invariants, In: Proceedings of The 14th International Conference on Composite Materials (ICCM-14) , 14-18 July, San Diego, California, USA.

Long-term Open-hole Compression Strength of CFRP Laminates based on Strain Invariant Failure Theory

Abstract

Keywords

References