scholarly journals Quality Assurance Protocol for AFCI Advanced Structural Materials Testing

2009 ◽  
Author(s):  
Jeremy T Busby
Keyword(s):  
Quality Assurance ◽  
Structural Materials ◽  
Materials Testing

scholarly journals Fatigue of the automobile structural materials in corrosive environment

2020 ◽  
Vol 164 ◽  
pp. 03039
Author(s):  
German Pachurin ◽  
Diana Goncharova ◽  
Gor Gevorgyan ◽  
Aleksey Filippov ◽  
Marya Mukhina ◽  
...  
Keyword(s):  
Fatigue Behavior ◽  
Experimental Studies ◽  
Structural Materials ◽  
Operational Reliability ◽  
Machine Building ◽  
Materials Testing ◽  
Corrosive Environment ◽  
Fatigue Rupture ◽  
New Processing ◽  
Experimental Data Analysis

Operation of machines and equipment is accompanied by an impact produced by various types of loads leading to fatigue rupture of the structural materials. The most harmful are the vibration loads which in a corrosive environment increase the potential for a failure resulting in human casualties. Therefore, the task of ensuring the operating capability of machine elements and assemblies is one of the outstanding tasks for all industry sectors. In addition, the need for extending the service life and increasing the operational reliability is also determined by a relatively high cost of the machine structural materials and hardware items. Therefore, the execution of the experimental studies of the structural material fatigue features with a view to reduce the metal consumption, to establish new processing methods as well as to select a competitive material, are of the priority for the up-to-date machine building sector. The purpose of this article is to determine any fatigue behavior regularities in automotive materials which were pre-processed according to various technology types and modes and which were operating in a corrosive environment. The experimental data analysis has demonstrated that the longer the cyclic metal materials testing is run, the more sufficient is the decrease of the fatigue resistance of these.

scholarly journals Implementation of Quality Management System in the Department of Public Works and Highways

1970 ◽  
Vol 2 (2) ◽  
pp. 191
Author(s):  
Mark John B. Malibong
Keyword(s):  
Quality Assurance ◽  
Quality Management ◽  
Management System ◽  
Quality Management System ◽  
Public Works ◽  
Materials Testing ◽  
Monitoring And Control ◽  
Design Data ◽  
Level Of Satisfaction ◽  
Significant Difference

The construction industry has been criticized for its poor performance and productivity. This study assessed the implementation of the quality management system provided by the quality assurance section of the Department of Public Works and Highways (DPWH) in Negros Occidental, Philippines. Using a descriptive, comparative, and correlational research design, data were collected using a researcher-made questionnaire accomplished by 265 respondents identified through stratified random sampling. Using descriptive and inferential statistics, findings showed a great extent of implementation, and clients and end-users revealed a high level of satisfaction. There was a significant difference in materials testing, quality assurance, and quality control. No significant difference was found in the level of satisfaction and between implementation and satisfaction on the implementation of the quality management system. The major challenge identified by implementers was responsibility. Indeed, the success of a quality management system requires proper monitoring and control.

scholarly journals Advanced Signal Processing Methods for Inspection of Aircraft Structural Materials

2020 ◽  
Vol 2020 (2) ◽  
pp. 27-35
Author(s):  
Iuliia Lysenko ◽  
Volodymyr Eremenko ◽  
Yurii Kuts ◽  
Anatoliy Protasov ◽  
Valentin Uchanin
Keyword(s):  
Signal Processing ◽  
Phase Measurement ◽  
Ultrasonic Attenuation ◽  
Flaw Detection ◽  
Structural Materials ◽  
Thickness Measurement ◽  
Materials Testing ◽  
Discrete Hilbert Transform ◽  
High Durability ◽  
The Time Domain

AbstractAircraft, their assemblies, and units must provide high durability and reliability, and maintain mechanical and technological characteristics throughout the life span of the aircraft. Different elements of aircraft structures work under mechanical loads, over a wide temperature range, with varying degrees of exposure to corrosive environments. Aircraft structural materials have a variation in the characteristics values and require the various testing methods for their inspection.In many NDT methods applied in aviation materials testing, signals that could be represented by a narrowband processes model are used. Known methods of their processing are focused on determining and analyzing the signals amplitude characteristics, but the information resource contained in phase characteristics is not used.In the article, the methodology for signal processing and determining phase characteristics in the time domain are discussed. It is based on the combination of the discrete Hilbert transform and the deterministic and statistical methods of the phase measurement. There are given examples of the application of the methodology for pulsed eddy current testing of electrically conductive materials and products, ultrasonic thickness measurement of products made of materials have significant ultrasonic attenuation, the realization impulse variant of acoustic impedance flaw detection of products made of composite materials. The examples have shown that the proposed signal processing methodology enables to determine new information parameters and signal characteristics for the industry, and extend the scope of known NDT methods.

Development of Quality Control/ Quality Assurance Specifications by Using Statistical Quality Assurance for Asphalt Concrete Pavements in California

1998 ◽  
Vol 1632 (1) ◽  
pp. 13-21 ◽  
Author(s):  
Joe Dobrowolski ◽  
Terrie Bressette
Keyword(s):  
Quality Control ◽  
Quality Assurance ◽  
Asphalt Concrete ◽  
Quality Analysis ◽  
Materials Testing ◽  
California Department ◽  
Statistical Quality ◽  
Industry Group ◽  
Control Quality ◽  
Implementation Program

Since 1992, the California Department of Transportation (Caltrans) has been working to improve quality in construction contracting and ultimately the quality of the product provided to the public. In 1996, Caltrans implemented quality control/quality assurance (QC/QA) specifications for asphalt concrete paving. These specifications require contractor QC and provide rewards or penalties based on statistical quality analysis of eight quality characteristics. These specifications were developed through a joint Caltrans/industry group and are supplemented with a QC manual. They were introduced through presentations to user/producer groups, appointment of district QC/QA coordinators, and training for engineers. In March 1996 the first project using QC/QA specifications for asphalt concrete went to bid and in the first year six projects were completed with them. Early projects were for the most part successful. Throughout 1996-1997, the specifications, the QC manual, and the implementation program were reviewed. Revisions to the specifications have been developed. The specifications and manual, issues, recommendations based on the 1996 projects, changes Caltrans has made for the continued use of QC/QA for asphalt concrete, and anticipated additional endeavors in the areas of QC/QA and materials testing are discussed here.

Sign in / Sign up

Export Citation Format

Share Document