Analyzing structural durability in the frequency domain

A system for analyzing the durability of a structure, the system comprising at least one processor and memory configured to:

• receive at least one effective material property of a plurality of materials from load-controlled testing of samples of the plurality of materials to be used as part of a structure, the plurality of materials comprising at least one composite material, wherein the load-controlled testing includes determining the at least one effective material property of the at least one composite material based on an accumulative invariant approach;
• form a parametric model of the structure based on the load-controlled testing of the samples and a geometric definition of the structure, wherein the parametric model includes a plurality of elements based on the geometric definition of the structure, and the at least one effective material property of the at least one composite material;
• and
• determine, using the parametric model, failure characteristics of the structure under load conditions by determining frequency responses of the plurality of elements to data of the load conditions applied to the plurality of elements in the parametric model,
• wherein the at least one effective material property is based on interactions of a plurality of phases of the at least one composite material, the phases including a polymeric matrix phase and a fiber reinforcement phase, and
• wherein determining the failure characteristics of the structure further comprises assessing failure within the fiber reinforcement phase of the at least one composite material and determining a percentage of plies that have failed.

A non-transitory medium containing processor-readable instructions when performed by a processor cause the processor to perform operations of:

• receiving at least one effective material property of a plurality of materials from load-controlled testing of samples of the plurality of materials to be used as part of a structure, the plurality of materials comprising at least one composite material, wherein the load-controlled testing includes determining the at least one effective material property of the at least one composite material based on an accumulative invariant approach;
• forming a parametric model of the structure based on the load-controlled testing of the samples and a geometric definition of the structure, wherein the parametric model includes a plurality of elements based on the geometric definition of the structure, and the at least one effective material property of the at least one composite material;
• and
• determining, using the parametric model, failure characteristics of the structure under load conditions by determining frequency responses of the plurality of elements to data of the load conditions applied to the plurality of elements in the parametric model,
• wherein the at least one effective material property is based on interactions of a plurality of phases of the at least one composite material, the phases including a polymeric matrix phase and a fiber reinforcement phase, and
• wherein determining the failure characteristics of the structure further comprises assessing failure within the fiber reinforcement phase of the at least one composite material and determining a percentage of plies that have failed.