Transient response of laminated composites with subsurface cracks
The dynamic response of subsurface cracks in fiber-reinforced composites is analytically studied. The response of layered half-space and three-layered plate with two interface cracks excited by a plane SH-wave and line load, respectively, are studied by formulating the problem as integral equations in the frequency domain. The governing equations along with boundary, regularity, and continuity conditions across the interface are reduced to a coupled set of singular integral equations by using Betti's reciprocal theorem along with the Green's functions. In addition, the transient response of an orthotropic half-space with a subsurface crack subjected to inplane line load at an arbitrary angle is analyzed. Two new Green's functions for the uncracked medium are developed and used along with the representation theorem to derive the scattered field. Numerical results are presented for isotropic and anisotropic materials for several different crack geometries. The results show significant influence of crack geometries and material properties on the surface response of composites.
- Research Organization:
- Arizona Univ., Tucson, AZ (USA)
- OSTI ID:
- 5300314
- Country of Publication:
- United States
- Language:
- English
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