Implementation of failure criteria for transverse failure of orthotropic Non-Crimp Fabric composite materials

Failure Criteria Analysis of Laminate Composite Materials

This paper deals with the development of a numerical simulation methodology for estimating damages in laminate composite materials caused by a low-speed impact. Experimental tests were performed on laminate plates reinforced with woven carbon fibers and epoxy resin. Three thickness plates were evaluated. The impact loads were transversal and punctual. Two lamina failure criteria were evaluated....

Proposal for a Failure Surface for Orthotropic Composite Materials

A Study of Failure Criteria of Fibrous Composite Materials

Since its founding, NASA has been dedicated to the advancement of aeronautics and space science. The NASA Scientific and Technical Information (STI) Program Office plays a key part in helping NASA maintain this important role. The NASA STI Program Office is operated by Langley Research Center, the lead center for NASA's scientific and technical information. The NASA STI Program Office provides ...

Failure stress criteria for composite resin.

In previous work (Peters and Poort, 1983), the stress distribution in axisymmetric models of restored teeth was analyzed by finite element analysis (FEA). To compare the tri-axial stress state at different sites, they calculated the Von Mises equivalent stress and used it as an indication for weak sites. However, the use of Von Mises' theory for material failure requires that the compressive an...

تععین پارامتر های ترانسفورماتور به منظور تشخیص خطا transformer parameter determination for the purpose of failure diagnosis

چکیده ترانسفورماتورهای قدرت ادوات گران قیمتی هستنند که نقش بسیار مهمی را در سیستم های قدرت ایفا می کنند. در سالهای اخیر روشهای مختلفی جهت تشخیص خطا و مونیتورینگ ترانسفورماتورها ارائه شده است. در این پایان نامه برخی از این روشها جهت تعیین پارامتر های ترانسفورماتور در شرایط سالم و خطاهای مختلف در محدوده ی وسیعی از فرکانس بررسی شده است. همچنین با استفاده از روش اجزای محدود و محاسبات بر پایه فرمو...