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The GENOA PMC software offers the following capabilities:

1. MCA - Material constituent analysis predicts the composite lamina and laminate properties under manufacturing (void, fiber waviness, residual stress) and environmental service conditions (e.g. thermal degradation) [5].
2. MCO - Material constituent Optimization – Reverse engineers, predicts the constituent fiber strength/stiffness, and matrix nonlinear stress-strain relationship based on a set of lamina and laminate properties considering the manufacturing (void, fiber waviness, residual stress)
3. MUA - Material uncertainty analysis predicts the percent contribution of manufacturing processes and composite mechanical properties at the constituent, lamina, and laminate levels to potential failure mechanisms such as delamination.
4. FEA - Finite element analysis predicts the stress, strain, and displacement of lamina and laminate under different loading conditions
5. PFA - Progressive failure analysis has the ability to simulate: 1) microscopic damage initiation, 2) NavAIR requirement of 0.01 in. crack initiation, and 3) the Air Force requirement of stable crack growth of a 0.05 in. crack, and 4) damage progression until structural integrity is lost. PFA computes the inspection intervals, the multi-site locations of damage, contribution of damage mechanisms to failure and margin of safety, 4) design for minimum damage in service by progressive failure optimization technique. It can predict, under all operational conditions (temperature/thermal gradient, humidity, oxidative/corrosive agents), property degradation by implementing the multifactor interaction model
6. PFO - Progressive Failure Optimization inhibits damage initiation, damage propagation, fracture initiation, fracture propagation subject to weight minimization
7. TDR – Time Dependent Reliability, by probabilistic progressive failure analysis, predicts the CMC part’s probability of failure and sensitivity of potential failure to ply angle, 2d/3d construction type, strength, thickness, and voids.

Computer based simulation of CMC service life (i.e., durability and reliability) has been under development by NASA Lewis/Langley [6-11] for several years. Computer codes have become available for evaluating CMC structures under service conditions. These codes have been modified and integrated by Alpha STAR into a unified software system, GENOA [12] (Table 3). GENOA has a verified ability to evaluate CMC structural durability and reliability [13, 14] via simulation of crack initiation and progression to structural failure under static, cyclic fatigue, thermo-mechanical and creep, impact, and random loadings.

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