Micromechanical modeling of transient waves from matrix cracking and fiber fracture in laminated beams
2000 (English)In: International Journal of Solids and Structures, ISSN 0020-7683, E-ISSN 1879-2146, Vol. 37, no 30, 4083-4102 p.Article in journal (Refereed) Published
A micromechanical model for excitation of waves resulting from fiber fracture and matrix cracking in laminated beams is presented. The source is described as a time dependent displacement discontinuity and the wave propagation in the beam is modeled by a higher-order beam theory. The equations of motion defined by the beam model are then formally solved by employing integral transforms. Asymptotically valid solutions are subsequently found using residue calculus and the stationary phase method. As an example, a [90/0(2)/90] beam with a width to thickness ratio of 10 is considered. The dispersion curves resulting from the beam theory and three-dimensional finite element computations are compared and a maximum frequency for applicability of the beam theory is determined. The time response from fiber fracture and transverse matrix cracking is presented. The applications of the results to the analysis of acoustic emission experiments are also discussed.
Place, publisher, year, edition, pages
2000. Vol. 37, no 30, 4083-4102 p.
transient waves, beam, bar, dispersion, matrix crack, fiber fracture, acoustic emission, acoustic-emission, plate, propagation
IdentifiersURN: urn:nbn:se:kth:diva-19746DOI: 10.1016/S0020-7683(99)00147-XISI: 000086974000003OAI: oai:DiVA.org:kth-19746DiVA: diva2:338438
QC 201005252010-08-102010-08-102010-10-22Bibliographically approved