Mechanical performance testing method for special foam material of EMAS (Engineered Material Arresting System)

Abstract

The invention discloses a mechanical performance testing method for a special foam material of an EMAS (Engineered Material Arresting System), which belongs to the professional field of material performance measuring and material engineering and application. According to the method, a penetration compressing testing method is adopted, wherein an electronic universal testing machine is adopted to continuously downwards compress a penetration head within certain area at a constant loading speed until reaching preset compressing depth or a specified load value; and in the whole process, the applied compressing load and corresponding compressing displacement are measured, and the relationship between the compressing load and deformation are determined. The testing method provided by the invention can avoid errors caused by the falling of materials along with a machine in the conventional compressing method, and also can overcome the defect that the conventional penetration compressing method cannot show real edgings; and according to the testing method, an obtained compressing stress-compressing strain curve is closer to the mechanical characteristics of a foam material in a foam material failure process, and therefore, the testing result is accurate.

Description

technical field [0001] The invention relates to the professional fields of material performance measurement, material engineering and application, in particular to a method for testing the mechanical properties of characteristic foam materials used in airport runway characteristic material arresting systems. Background technique [0002] Statistical data both at home and abroad show that among the incidents that seriously endanger civil aviation flight safety, the aircraft overrunning the runway ranks first. To this end, ICAO is about to increase the standard for the length of the runway end safety zone in the "International Standards and Recommended Practices", so as to reduce the major flight safety accidents caused by running out of the runway. However, due to the constraints of geography or other environmental factors, it is difficult for many airports to meet the length requirements of the new runway end safety zone. In the case of the length of the safety zone, the sa...

AI Technical Summary

Problems solved by technology

However, the test process of this method cannot accurately reflect the boundary conditions between the tire and the foam material when the wheel rolls on the foam material, and the test results will bring certain errors in the design and calculation of the EMAS system.

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