公开(公告)号：US20240241009A1

公开(公告)日：2024-07-18

申请号：US18155448

申请日：2023-01-17

Applicant: The Boeing Company

Inventor： Joseph D. Schaefer ,  Brian P. Justusson

IPC: G01M5/00 ,  G01N3/04 ,  G01N3/32

CPC classification number: G01M5/0033 ,  G01N3/04 ,  G01N3/32

Abstract: A method for determining fatigue properties of a structure includes mounting the structure in a load frame. The structure has a crack with a crack size. The method includes applying repeatedly an adjustable stimulus to the structure over multiple cycles. The adjustable stimulus is an adjustable load or an adjustable displacement applied to the structure. The method further includes storing the crack size at a start of the cycles, measuring a response of the structure subjected to the adjustable stimulus in each cycle, updating the crack size based on the response in each cycle, and updating the adjustable stimulus in each cycle. The adjustable stimulus as updated maintains a strain energy release rate approximately constant based on the crack size. The method includes calculating a growth rate of a crack propagation in the structure based on the response in each cycle, and storing the growth rate in a file.

公开(公告)号：US11966671B2

公开(公告)日：2024-04-23

申请号：US16207254

申请日：2018-12-03

Applicant: The Boeing Company

Inventor： Joseph D. Schaefer ,  Brian P. Justusson

IPC: G06F30/23 ,  G06F111/10 ,  G06F111/20

CPC classification number: G06F30/23 ,  G06F2111/10 ,  G06F2111/20

Abstract: A computer is configured to generate a computer model predicting the progressive creation, density, and spacing of a plurality of cracks in a filler material, such as a “noodle,” for example, disposed at a connection interface between a load-bearing composite structural component, such as a stringer or a spar, for example, and the structural framework of a vehicle on which those structural components are utilized.

公开(公告)号：US20230342514A1

公开(公告)日：2023-10-26

申请号：US17726080

申请日：2022-04-21

Applicant: The Boeing Company

Inventor： Joseph D. Schaefer ,  Brian P. Justusson ,  Mainak Bhattacharya

IPC: G06F30/15 ,  G06F30/23 ,  B64C1/06

CPC classification number: G06F30/15 ,  G06F30/23 ,  B64C1/06

Abstract: A computer-implemented method facilitates receiving, by a computing system, one or more parameters that specify attributes associated with a bonded joint and, in particular, a type of bonded joint. The computing system selects from a model template repository one or more bonded joint model templates associated with the type of bonded joint. The computing system generates a bonded joint model based on the bonded joint model templates and the parameters. The bonded joint model facilitates the performance of finite element analysis (FEA). FEA logic of the computing system simulates the application of stress to the bonded joint model. The FEA logic of the computing system determines a change in a size of a defect that results from the application of stress to the bonded joint model. The computing system determines, based on the change in the size of the defect, the life expectancy of the bonded joint.

公开(公告)号：US20210097150A1

公开(公告)日：2021-04-01

申请号：US16584119

申请日：2019-09-26

Applicant: The Boeing Company

Inventor： Brian P. Justusson ,  Joseph D. Schaefer ,  Bryan W. Lilley

IPC: G06F17/50 ,  B64D45/00

Abstract: A method, apparatus, and system for managing a composite structure. A set of component models is created for a set of components in the composite structure. A set of embedded reinforcement element models is placed within the set of component models for the set of components in the composite structure to form a composite structure model for the composite structure. The set of embedded reinforcement element models is for a set of embedded reinforcements embedded within the set of components in the composite structure. A structural analysis of the composite structure is performed using the composite structure model formed by the set of component models and the set of embedded reinforcement element models, wherein the set of embedded reinforcement element models enables modeling at least one of a deformation or a failure of embedded reinforcements.

公开(公告)号：US20200175127A1

公开(公告)日：2020-06-04

申请号：US16207254

申请日：2018-12-03

Applicant: The Boeing Company

Inventor： Joseph D. Schaefer ,  Brian P. Justusson

IPC: G06F17/50

Abstract: A computer is configured to generate a computer model predicting the progressive creation, density, and spacing of a plurality of cracks in a filler material, such as a “noodle,” for example, disposed at a connection interface between a load-bearing composite structural component, such as a stringer or a spar, for example, and the structural framework of a vehicle on which those structural components are utilized.

公开(公告)号：US20170328868A1

公开(公告)日：2017-11-16

申请号：US15150595

申请日：2016-05-10

Applicant: The Boeing Company

Inventor： Hong Hue Tat ,  Yuan-Jye Wu ,  Joseph D. Schaefer ,  Mary J. Mathews ,  Anne Kao ,  Victor P. Pauca ,  Rongzhong Li

IPC: G01N29/14 ,  G01L1/10 ,  G01H1/00

CPC classification number: G01N29/14 ,  G01H1/00 ,  G01L1/106

Abstract: A method and apparatus for analyzing an object using acoustic emissions. Load data is received for the object. Acoustic waveform data is received for the object from an acoustic sensing system. The acoustic waveform data represents acoustic emissions emanating from the object and is detected using the acoustic sensing system. A plurality of bins is created for the load data. A plurality of frequency distribution functions is generated for the plurality of bins using the acoustic waveform data. A set of learning algorithms is applied to the plurality of frequency distribution functions and the acoustic waveform data to generate an output that allows an operator to more easily and quickly assess a structural integrity of the object.