Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 237 for “"test methods"”.
-
Comparison of Shear Modulus Test Methods
This research compared the results of three tests: ASTM D 198 torsion, ASTM D 198 three-point bending and the five-point bending test (FPBT) using machine-stress-rated (MSR) lumber and laminated veneer lumber (LVL) to determine if the shear properties evaluated by the different test methods were …
-
Objective Test Methods for Waveguide Audio Synthesis
… of the line models. In the area of audio quality testing, the most common tests have traditionally been group listening tests. While these tests are subjective and can be expensive and time-consuming, the results are validated by the groups' proper quality standards. Research has been conducted to …
-
Analysis of shear test methods for composite laminates
… of the stress distributions in four flat test specimens for in-plane shear response of composite materials subjected to mechanical or thermal loads is presented. The shear test specimens investigated include: slotted coupon, cross beam, Iosipescu, and rail shear. Results are presented in …
-
Test methods and analysis for glass-ceramic matrix composites
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1991.
-
Occupational Head Protection: Considerations for Test Methods and Use
… crash simulations and head impact laboratory tests designed to simulate real-world head impacts. Deformation and change in velocity were used to compare the energy managed by each system. The laboratory results generally tested higher severity impacts, with higher accelerations, compared to …
-
Standardization of test methods for property evaluation of FRP bars
… is to verify/modify/develop standardized test methods for evaluating mechanical properties of Fiber Reinforced Polymer (FRP) bars by conducting limited complementary tests to determine/verify their mechanical properties. Both short and long-term tests were conducted as a part of this …
-
Analysis of robotic systems test methods targeting test resource utilization improvement
… by Cost of Quality and Design of Experiments methods, the author breaks down the production systems test of robot manufacturing to identify areas for the focus of experimentation to improve quality and resource utilization. Considering connections between First Pass Yield and Field Failure …
-
Stagnation temperature test methods for determining solar collector thermal performance degradation
… investigations have shown that the existing test method may not be sufficiently sensitive to detect expected changes in material properties, is influenced by the test environment, and is relatively expensive to perform. The material properties of interest are primarily the cover …
-
Characterization of Ultra-High Performance Concrete Tension Behavior Using Different Test Methods
… fibers that compose UHPC. However, the standard test methodologies for accurately describing the tensile behavior of UHPC are still in the process of being developed and standardized. Direct tension (DT) and four-point bending (4PB) test methods are two commonly used methods in research and …
-
Charged device model electrostatic discharge protection and test methods for integrated circuits
This work focuses on methods for testing and increasing the robustness of integrated circuits (ICs) to electrostatic discharge (ESD). Specifically, this work focuses on charged device model (CDM) protection and test methods. In this work it is shown that the CDM robustness of an I/O can be …
-
RF test methods for balanced receivers for swept source optical coherence tomography
… (RF) range up to 2GHz is presented. The test procedure, including measurements of gain, bandwidth, and harmonic distortion, is automated by National Instruments Virtual Instrument Software Architecture (NI-VISA) programming using USB and GPIB interface. Since the test equipment has …
-
New in-plane and interlaminar shear test methods for fiber reinforced composites
… double-notched specimen for in-plane shear testing of isotropic, anisotropic and composite materials was developed. A preliminary test of the specimen was performed on a cross-ply laminate. High sensitivity moire interferometry was used to determine the shear and normal strains on the entire …
-
A study of tension, compression, and shear test methods for advanced composites
A study of the literature pertaining to test methods for advanced composite materials has been carried out. Several test methods were discussed and compared for each of three areas of interest. These areas were uniaxial tension, uniaxial compression and in-plane shear. Test methods were selected …
-
Investigation of performance degradation and test methods for flat-plate solar collectors
… as part of the NBS Durability/Reliability Test Program is presented. The data is analyzed for consistent patterns of performance degradation resulting from prolonged outdoor exposure at low flow rate and stagnation conditions. The analysis includes examination of the effects of pyranometer …
-
A review and development of accelerated test methods for anti-corrosive organic coatings
… the development of anti-corrosive coatings quick methods of evaluation are required and several are available which are both qualitative and quantitative. This investigation reviews both types of method, the first in the form of traditional salt spray exposure and the second in the form of …
-
The integration of non-destructive test methods in the South African Durability Index approach
… structures. The oxygen permeability index (OPI) test is being standardised in South Africa, and has been implemented in a large scale project by the South African National Roads Agency Limited (SANRAL). However, the semi-invasive nature of the test method (due to core extraction) has been seen as …
-
Non-woven, recycled carbon fibre composites : development of test methods and assessment of process parameters
… behaviour. Much of the standardised macro-scale test methods for composite characterisation were developed for continuous, fibre-reinforced composite systems and their applicability to non-woven, recycled carbon fibre composites is a gap in knowledge that needs to be addressed. This research …
-
A Quantitative Study of the Weldability of Inconel 718 Using Gleeble and Varestraint Test Methods
<p>Nickel super alloy Inconel 718 was tested and compared to Haynes 230 using Gleeble and Varestraint mechanical test methods. Hot cracking susceptibility was examined in either alloy using a sub-scale Varestraint test method at 5 augmented strain levels: 0.25%, 05.%, 1%, 2%, and 4%. Maximum crack …
-
Development and Implementation of Laboratory Test Methods for the Evaluation of Wearable Head Impact Sensors
… its performance has been completed. Preliminary tests have found that current sensors vary widely in performance. The objective of this work was to develop and implement a test method for evaluation of wearable sensors in an ideal laboratory environment. A custom pendulum was used to impact a …
-
Comparison of engine and chassis dynamometer test methods for three heavy-duty vehicles emissions characterization, A
Includes bibliographical references (pages 135-140).
Page 1 of 12