Crack surface displacement coupling due to material anisotropy

✍ Scribed by Yong Li Xu

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 673 KB
• Volume: 49
• Category: Article
• ISSN: 0013-7944
• DOI: 10.1016/0013-7944(94)90270-4

✦ Synopsis

It is found that unlike in isotropic materials, there is crack surface displacement coupling (CSDC) for cracks in anisotropic solids, i.e. crack surfaces will distort even under the influence of a symmetrical load, likewise, crack surface shear stress will cause crack surfaces to open or interfere. By considering a crack in an anisotropic medium subjected to symmetrical or skew symmetrical load, the behavior of the CSDC is analyzed, the minimum conditions that the material should satisfy in order to eliminate the CSDC are derived. It is shown that the CSDC stems from the dislocation coupling. Numerical results of CSDC are obtained for cracks in the carbon-fiber-epoxy-matrix composites. Since under some circumstances, the crack surface shear stress will cause the interference of the crack surfaces, we have to consider the occurrence of the crack surface contact for those cases.