A MOUNTING ELEMENT FOR A GAS TURBINE ENGINE, AND A STRUCTURE AND AN AIRCRAFT WITH SUCH A MOUNTING ELEMENT
A mounting element for transferring loads between a gas turbine engine and an airframe is provided, the mounting element presenting a cylindrical hole for receiving a fastening element, such as a pin or a bolt. The mounting element includes a collapsible element surrounding the hole, and is adapted to operate in a first mode, and to operate, upon a collapse of the collapsible element, in a second mode, in which the stiffness of the mounting element is lower than in the first mode. In a second aspect of the invention the energy absorption capacity of the mounting element is higher in the second mode than in the first mode.
1 . A mounting element for transferring loads between a gas turbine engine and an airframe, the mounting element presenting a cylindrical hole for receiving a fastening element, such as a pin or a bolt, comprising a collapsible element surrounding the hole, the mounting element being adapted to operate in a first mode, and to operate, upon a collapse of the collapsible element, in a second mode, in which the stiffness of the mounting element is lower than in the first mode.
2 . A mounting element according to claim 1 , comprising a solid portion surrounding the collapsible element.
3 . A mounting element according to claim 1 , comprising a reduced stiffness element surrounding the hole, and being adapted to provide a load path in the second mode.
4 . A mounting element according to claim 3 , wherein the reduced stiffness element is provided adjacent to or in the vicinity of the collapsible element.
5 . A mounting element according to claim 3 , comprising a solid portion surrounding the collapsible element and the reduced stiffness element.
6 . A mounting element according to claim 1 , wherein the collapsible element provides a load path in the second mode, the stiffness of the collapsible element being lower in the second mode than in the first mode.
7 . A mounting element according to claim 6 , wherein the collapsible element is adapted to at least partially disintegrate.
8 . A mounting element according to claim 7 , wherein the collapsible element comprises a brittle material.
9 . A mounting element for transferring loads between a gas turbine engine and an airframe, the mounting element presenting a cylindrical hole for receiving a fastening element, such as a pin or a bolt, comprising a collapsible element surrounding the hole, and the mounting element being adapted to operate in a first mode, and to operate, upon a collapse of the collapsible element, in a second mode, in which the energy absorption capacity of the mounting element is higher than in the first mode.
10 . A mounting element according to claim 9 , comprising a solid portion surrounding the collapsible element.
11 . A mounting element according to claim 9 , comprising an energy absorbing element surrounding the hole, and being adapted to provide a load path in the second mode.
12 . A mounting element according to claim 9 , wherein the collapsible element provides a load path in the second mode, the energy absorption capacity of the collapsible element being higher in the second mode than in the first mode.
13 . A structure for transferring loads between a gas turbine engine and an airframe, the structure comprising a mounting element according claim 1 , the structure further comprising an auxiliary load transferring element adapted to provide in the second mode a further load path for transferring loads between the gas turbine engine and the airframe.
14 . An aircraft comprising a mounting element according to claim 1 .
15 . A structure for transferring loads between a gas turbine engine and an airframe, the structure comprising a mounting element, according claim 9 , the structure further comprising an auxiliary load transferring element adapted to provide in the second mode a further load path for transferring loads between the gas turbine engine and the airframe.
16 . An aircraft comprising a mounting element according to claim 9 .