Partial closure of rectilinear bridged cracks in stringer plate with a hole

• Дата: 2017
• Автор: Мир-Салим-заде, М. В.
• Формат: Стаття
• Мова: Russian
• Опубліковано: Інститут енергетичних машин і систем ім. А. М. Підгорного Національної академії наук України 2017
• Теми: stringer plate; circular hole; cohesive forces in bonds; contact of crack faces; contact stresses; УДК 539.375; стрингерная пластина; круговое отверстие; силы сцепления в связях; контакт берегов трещин; контактные напряжения; стрингерна пластина; круговий отвір; сили зчеплення в зв’язках; контакт берегів тріщин; контактні напруження.
• Онлайн доступ: https://journals.uran.ua/jme/article/view/105683
• Назва журналу: Energy Technologies & Resource Saving

An elastic isotropic plate reinforced by stringers and having a circular hole has been considered. From the circular hole two symmetric rectilinear bridged cracks are originate. Size of the cracks end zones (zones with the interfacial bonds) is comparable with size of the cracks. The case of partial closure of the cracks is considered. Size of the zones of the crack faces contact is unknown in advance. Effect of the stringers is replaced by unknown equivalent concentrated forces applied at the points of the ribs and plate joining. For definition of the parameters characterizing the closure of cracks, a singular integral equation has been obtained. The singular integral equation has been reduced to a finite nonlinear algebraic system using the algebraization procedure. Solving the algebraic system by the method of successive approximations, the cohesive forces in the bonds, the contact stresses and the size of the contact zones of the cracks have been found.