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.
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Showing 1 to 8 of 8 for “"Cyclic conditions"”.
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Evaluation of the performance of corrugated shipping containers : virgin versus recycled boards
… fibreboard boxes after exposure to high and cyclic relative humidity conditions were studied and compared between boxes made from virgin and recycled liners and mediums which had the same ring crush values. The effect of moisture absorption rate by materials on the creep rate was investigated …
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Numerical Study of Convective Heat Transfer in Flat Tube Heat Exchangers Operating in Self-Sustained Oscillatory Flow Regimes
… were transition flow regimes characterized by cyclic variations of flow parameters such as stream-wise or cross-stream velocity. A computer code was developed to perform the numerical simulations. Spatial discretization was based upon a Control Volume Finite Element Method (CVFEM). Temporal …
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Fiber fracture in continuous-fiber reinforced composite materials during cyclic loading
… between those devices and the material, under cyclic conditions. This investigation presents the findings of a fiber-based investigation of unidirectional composite material systems. In particular, a unidirectional graphite/epoxy system was studied, and the influence of applied load level on …
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Moisture occurrence in roof assemblies containing moisture storing insulation and its impact on the durability of building envelope
… full scale specimens, a 190-day test with daily cyclic conditions was designed and performed during which moisture transfer was monitored with electronic sensors and gravimetry. The test consisted of eight flat roof assemblies fully insulated with cellulose subjected to one complete, quasi …
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Modeling cycle and time dependent creep/relaxation effects on fatigue lives of notched members
Mechanical cyclic variations in mean stress and strain amplitude is a well-known occurrence for metals even at room temperature. Many fatigue analysis procedures ignore these variations. Fatigue analysis which included both time and cycle dependent mechanical material behavior for metals at room …
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The effect of drawing strain on the fatigue behaviour of stainless and carbon steel wires
… 20% of martensite, any martensite induced by cyclic strain will encourage more rapid crack initiation compared to a material containing less than 20% martensite which leads to more brittle fracture surface characteristics. The fatigue limit of 3CR12 steel wire was also improved from 130 MPa to …
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Determination of the Critical Moisture Level for Mould Growth on Building Materials
… materials that can withstand the expected conditions. It is thus crucial that data are available to allow the correct choices of materials to be made, especially information on the critical moisture level for mould growth is needed. This is the lowest RH at which mould can grow on the …
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Thermo-mechanical Analysis of a Custom PCB-DBC Hybrid Package for a (650 V, 150 A) e-GaN HEMT
… the fatigue placed on bonds exposed to these cyclic conditions, with a common metric being the volume-averaged inelastic strain energy density gained per cycle (ΔWavg). ΔWavg can identify which bonds are subjected to the greatest amount of fatigue and will thus fail first, and then quantify …