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2016-04-05
Technical Paper
2016-01-0415
Sijin Wu, Xinya Gao, Yong Lv, Yanpeng Jiang, Yao Fang, Aiguo Zhou
Temporal phase-shifting and spatial-carrier techniques are the two dominant phase extraction methods used in digital speckle pattern interferometry (DSPI). Temporal phase-shifting technique enjoys the advantages of precise phase extraction and capability of high-quality phase map formation, but suffers from the limitation in its use in dynamic measurement due to the time cost for carrying out the phase shift. To meet the rising demand of dynamic measurement of deformations in modern industry, spatial-carrier technique is developed to extract the phase information from a single speckle interferogram, yielding less time cost during a test. In this paper, both temporal phase-shifting and spatial-carrier techniques are investigated in theory as well as experiment. The experiment results from measuring a same deformation behavior using both techniques are used to compare the performances of the two phase extraction techniques.
2016-04-05
Technical Paper
2016-01-0418
Xin Xie, Danielle Zeng, Junrui Li, Jeffrey Dahl, Qiancheng Zhao, Lianxiang Yang
Polymer plastics are widely used in automotive light weight design. Tensile tests are generally used to obtain material stress-strain curves. Due to the natural of the plastic materials, it could be elongated more than several hundred percent of its original length before breaking. Digital Image Correlation (DIC) Analysis is a precise, full field, optical measurement method. It has been accepted as a practical in-field testing method by the industry. However, with the traditional single-camera or dual-camera DIC system, it is nearly impossible to measure the extreme large strain. This paper introduces a unique experimental procedure for large strain measurement. By utilization of quad-camera DIC system and data stitch technique, the strain history for plastic material under several hundred percent of elongation can be measured. With a quad-camera DIC system, the correlation was conducted between two adjacent cameras.
2016-04-05
Technical Paper
2016-01-0419
Whitney Poling, Vesna Savic, Louis Hector, Anil Sachdev, Xiaohua Hu, Arun Devaraj, Fadi Abu-Farha
The strain-induced diffusionless shear transformation of retained austenite into martensite during forming of transformation induced plasticity (TRIP) steels increases strain hardening and delays necking and fracture leading to exceptional ductility and strength, which are attractive for automotive applications. A novel technique that provides the retained austenite volume fraction variation with strain in TRIP steels with improved precision is presented. Digital images of the gauge section of tensile specimens were first recorded up to selected plastic strains with a stereo digital image correlation (DIC) system. The austenite volume fraction was measured by synchrotron X-ray diffraction from small squares cut from the gage section. Strain fields in the squares were then computed by localizing the strain measurement to the corresponding region of a given square during DIC post-processing of the images recorded during testing.
2016-04-05
Technical Paper
2016-01-0417
With the advent of the energy crisis, lightweight of automobile has become a trend. Aluminum Alloy (AA) is used in automobile industry increasingly and the study of the AA plate formability becomes more important. This paper proposed new methods for strain hardening and edge stretching limit based on the digital image correlation (DIC) technique. Using this 3D dynamic strain measurement system, real-time whole field bi-directional strain of large AA sheets during stretching can be observed, especially the maximum plastic strain before breakage. The true strain data of every point of the sheets can be obtained. Based on these large pre-tension sheets, a lot of notch-shape coupons with three different pre-strain conditions(5%,10% and fractured) can be cut from them. Compared to the traditional average value, this pre-strain is more accurate and effective. Then a dual-camera 3D-DIC system is utilized to measure edge stretching limit of these notch-shape coupons.
2016-04-05
Technical Paper
2016-01-0416
Eduardo Bustillos, Haley Linkous, Xin Xie, Laila Guessous, Lianxiang Yang
This paper presents the measurement and analysis of the edge stretching limit of aluminum alloy using digital image correlation. The edge stretching limit, also known as the “edge thinning limit,” is the maximum thinning strain at a point of edge failure resulting from tension; which may be predisposed by edge quality. Edge fracture is a vital failure mode in sheet metal forming, however it is very difficult to measure. A previous study enabled the measurement of edge thinning strain by using advanced digital image correlation but it did not consider how the edge quality could affect the edge stretching limit of aluminum alloy. This paper continues to measure edge thinning strain by comparing polished to unpolished AA5754, thus determining the effect edge quality has on the edge stretching limit. To enable the measurement by optical method for a very long and thin sample, a notch is used to localize where edge failure occurs.
2015-11-08
WIP Standard
AMSSTD595A
This standard presents the colors used by Government Activities in a format suitable for color selection, color matching and for quality control inspection. This document describes the designation and use of the color chips of this standard. Formats for color chip representation and precise color matching formats are as described below:
2015-11-05
Standard
J599_201511
This code is intended only for the inspection and maintenance of lighting equipment on motor vehicles that are in use.
2015-10-19
Standard
AMSSTD595
This standard presents the colors used by Government Activities in a format suitable for color selection, color matching and for quality control inspection. This document describes the designation and use of the color chips of this standard. Formats for color chip representation and precise color matching formats are as described below:
2015-09-15
Journal Article
2015-01-2499
Perla Maiolino, Richard A. J. Woolley, Atanas Popov, Svetan Ratchev
Abstract The assembly and manufacture of aerospace structures, in particular legacy products, relies in many cases on the skill, or rather the craftsmanship, of a human operator. Compounded by low volume rates, the implementation of a fully automated production facility may not be cost effective. A more efficient solution may be a mixture of both manual and automated operations but herein lies an issue of human error when stepping through the build from a manual operation to an automated one. Hence the requirement for an advanced automated assembly system to contain functionality for inline structural quality checking. Machine vision, used most extensively in manufacturing, is an obvious choice, but existing solutions tend to be application specific with a closed software development architecture.
2015-09-15
Journal Article
2015-01-2608
Joshua Cemenska, Todd Rudberg, Michael Henscheid
Abstract In many existing AFP cells manual inspection of composite plies accounts for a large percentage of production time. Next generation AFP cells can require an even greater inspection burden. The industry is rapidly developing technologies to reduce inspection time and to replace manual inspection with automated solutions. Electroimpact is delivering a solution that integrates multiple technologies to combat inspection challenges. The approach integrates laser projectors, cameras, and laser profilometers in a comprehensive user interface that greatly reduces the burden on inspectors and decreases overall run time. This paper discusses the implementation of each technology and the user interface that ties the data together and presents it to the inspector.
2015-08-10
Standard
AS5282A
This SAE Aerospace Standard (AS) establishes requirements for the manufacture and certification of tool steel rings for magnetic particle inspection.
2015-08-01
WIP Standard
ARP4462A
This recommended practice covers the procedures and method for establishing acceptance criteria when performing Barkhausen noise testing of surface-hardened steel components to detect grinding burns (metallurgical damage caused by over-heating) in bare or chromium-plated parts. Primarily for nondestructive testing of heat treated, high strength low-alloy steel parts which have been ground, in accordance with MIL-STD-866 or commercial standard, before or after chromium plating. This test method may be used as an independent test or to confirm grinding damage detected in accordance with AMS 2440 or MIL-STD-867 in bare or chromium plated components.
2015-05-26
Standard
AMS2641C
This specification covers two types of refined hydrocarbon compounds in the form of liquids.
2015-05-06
WIP Standard
AMS2631E
This specification covers the procedure for ultrasonic inspection of wrought titanium and titanium alloy products 0.25 inch (6.4 mm) and over in cross-section (thickness) or diameter.
2015-04-14
Technical Paper
2015-01-0600
Marc Rosenbaum
Abstract A new generation of 3D inspection machines is now available to verify in line 3D dimensional conformity of complex parts - especially Powertrain ones - with accuracy down to 0.1 μm within manufacturing cycle time of large series. Inspecting in line 100% of production with an accuracy and at speed compatible with the most demanding part accuracy and fastest cycle time is presently already a reality for some large tier1 suppliers in Europe. Purpose of this paper is to introduce this breakthrough technology using state of the art non-contact sensing technology allied with innovative mechanics and the latest developments in 3D metrology software
2015-04-14
Technical Paper
2015-01-0596
Oliver Scholz, Nikolas Doerfler, Lars Seifert, Uwe Zöller
Abstract Polymer seals are used throughout the automobile for a variety of purposes, and the consequences of a failure of such a seal can range from annoying in case of an A/C component to catastrophic in the case of brake components. With the constantly increasing demands for these components regarding e.g. pressure, tighter tolerances or new refrigerants come more stringent requirements for ensuring surface properties according to the specification for the specific application. While automatic inspection systems are available for a variety of defects, the area of seal inspection is still dominated by manual labor, partly because handling of these small, inexpensive parts is difficult and partly because visual coverage of the entire sealing surface poses a problem. It is also difficult for a human inspector to objectively assess whether or not a surface defect is critical, especially given that inspection of each seal must be completed within a few seconds.
2015-03-17
Standard
AS13002
This document covers the process to be applied to design characteristics (as defined in AS9102), parts or inspection processes as defined by the purchaser. Design characteristics not included within the scope include electronic, electromechanical or mechanical systems where alternative means of acceptance are approved such as through acceptance test procedures (ATPs). This document does not define processes for identifying or communicating the classification of the parts or design characteristics. This document does not define the procedure to qualify a supplier to undertake these requirements. It is expected that each purchaser will have a procedure to manage the flow-down of these requirements. This document applies to suppliers that demonstrate adequate proficiency in applicable process control methods as determined by the purchaser.
2014-11-06
Standard
ARP6225
This document is for establishing tire removal criteria of on-wing civil aircraft tires only. This document is primarily intended for use with commercial aircraft but may be used on other categories of civil aircraft as applicable. The criteria are harmonized with the Care and Service Manuals of the tire manufacturers for both radial and bias tires.
2014-10-06
Standard
AS9102B
This standard establishes the baseline requirements for performing and documenting FAI. Should there be a conflict between the requirements of this standard and applicable statutory or regulatory requirements, the applicable statutory or regulatory requirements shall take precedence.
2014-09-30
WIP Standard
AMSSTD2154B
The purpose of this military standard is to provide uniform methods for the ultrasonic inspection of wrought metals and wrought metal products.
2014-02-06
Standard
AMS2647E
This specification details requirements and procedures for the detection of defects in aircraft and engine components during maintenance and overhaul operations.
2013-12-13
Standard
AMS2649D
This specification establishes the requirements for etch inspection of bare high strength low alloy steel parts having tensile strength of 180 ksi (1241 MPa) and higher and of carburized parts to detect overheating caused by abusive machining or grinding in the heat treated condition, and to detect localized discontinuous carburization. This process is not applicable to surface hardened steels produced by nitriding or carbonitriding. This process may remove 0.0001 to 0.0005 inch (2.5 to 12.7 micrometers) from the surface of the part.
2013-10-17
Standard
AMS2644F
This specification establishes the classification, technical requirements, tests, and test procedures for the qualification, approval, and quality verification of all materials used in the liquid penetrant methods of inspection with the exception of those excluded in the application section.
2013-10-04
Standard
ARP924B
This SAE Aerospace Recommended Practice (ARP) covers the requirements for the types of glass to be utilized in the fabrication of cover glasses and lighting wedges used in aerospace instruments. It defines the maximum extent of physical defects and recommends standard methods of inspection and evaluation. Definitions of terminology used in this document are covered in 2.2.
2013-09-24
Technical Paper
2013-01-2448
Muralidhar Suryanarayan Bhat
This paper deals with setting of Inspection parameters for selected automotive transmission parts in various bench tests. This paper we are discuss about critical dimension's measured for particular type of test. It is not possible to measure all the dimensions of a component for doing a particular test. This is due to time constraints set by program delivery deadlines. From above statement it can be deduced that it is almost impossible to measure all dimensions of a component. A bench level test may consist of two major tests. They are maximum load test and gear shift durability test. The maximum load test deals with gear box durability test and torque carrying capacity of gearbox. Parameters to be measured for some of above parts will be identified. More importantly it will also identify see reasons for that parameter to be measured.
2013-09-17
Technical Paper
2013-01-2147
Joshua Smith, Duncan Kochhar-Lindgren
Precision hole inspection is often required for automated aircraft assembly. Direct contact measurement has been proven reliable and accurate for over 20 years in production applications. At the core of the hole measurement process tool are high precision optical encoders for measurement of diameter and countersink depth. Mechanical contact within the hole is via standard 2-point split ball tips, and diametric data is collected rapidly and continuously enabling the system to profile the inner surface at 0 and 90 degrees. Hole profile, countersink depth, and grip length data are collected in 6 seconds. Parallel to the active process, auto-calibration is performed to minimize environmental factors such as thermal expansion. Tip assemblies are selected and changed automatically. Optional features include concave countersink and panel position measurement.
2013-09-17
Technical Paper
2013-01-2213
Christophe Bescond, Roy Wong, Patrick Desrosiers
Non Destructive Inspection (NDI) of large Out of Autoclave Cure primary monolithic and sandwich Composite structures is challenging due to high requirement for flaw detection and characterization among porosity, delamination, disbond, foreign material, crushed core, dry fiber. Large scale NDI inspection with semi-automated and automated system is presented for flaw detection/characterization and porosity assessment methodology is described with results for high porosity level assessment in monolithic and sandwich structures.
2013-09-17
Technical Paper
2013-01-2171
Moulay A. Akhloufi, Benjamin Verney
3D digitalization and modeling is very popular in industrial applications such as metrology, geometric dimensioning and tolerancing (GD&T) and tridimensional object inspection. The 3D captured data can be used for the inspection of object surfaces. However, hidden defects cannot be detected with this technology. In order to get this kind of information, NDT/E (Non-Destructive Testing/Examination) approaches are used (ultrasounds, infrared imaging, etc.). These two types of information are very important in aerospace products inspection (e.g. composite materials). The two modalities (3D Vision and NDT) are still used separately. In this work, we present a new multi-modal fusion framework for combining these two data types. The fusion scheme works on 3D image data and temporal thermal images in order to obtain a hybrid model for simultaneously inspecting the 3D surface and the hidden sub-surface defects.
Viewing 1 to 30 of 285

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