Verfahren und Systeme zur Beurteilung von Strukturen zur Berücksichtigung von R-Kurven-Effekten

Details

Veröffentlichungs-Nr.

EP4814469

Anmeldetag

23. Februar 2026

Veröffentlichung

30. September 2026

Rechtsraum

EP

Abstract

Methods and systems of determining propagation of a crack within a structure made of a bonded or layered material. In some examples, the method comprises performing experimental testing on one or more test coupons of the material and determining an R-curve and a Paris law curve. The method also comprises performing a computer simulation that applies a cycle of loads to a computer model of the structure, for each of the loads: determining strain energy release rates and a crack length of the applied load; applying the strain energy release rates and crack lengths to the R-curve and determining an effective strain energy release rate; applying the effective strain energy release rate to the Paris law curve and determining a change in the crack length for the cycle; and advancing a crack that is simulated in the computer model.

Anmelder

Firma

The Boeing Company

Land

🇺🇸 USA