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Bei allen Arten der Rissinitiation in bindigen Böden ist deren Zugfestigkeit die wesentliche Kenngröße des Materialwiderstands. Direkte und indirekte Methoden zur experimentellen Ermittlung der Zugfestigkeit wurden an unterschiedlich bindigen Böden vergleichend bei verschiedenen Proctor‐Verdichtungsgraden und Wassergehalten an gesättigten und ungesättigten Proben durchgeführt. Anhand der Versuchsergebnisse...
W pracy omówiono metody oznaczania aktywności pucolanowej popiołów lotnych i wybrano trzy, które zastosowano w badaniach. Były one następujące: metoda chemiczna ASTM C 379-56 oraz dwie metody fizyczne: Fratiniego i normową PN-EN 450-1. Badano popioły z węgla kamiennego i brunatnego z palenisk pyłowych oraz fluidalnych, a także różne frakcje ziarnowe tych popiołów, stwierdzono dobrą korelację wyników...
Silver plated copper is a new developed die attachment material to replace pure silver. As year past, price of silver getting higher and become a problem for those semiconductors packaging company. Therefore, silver plated copper was developed as new die attachment material to solve the costing problem. But the characteristic and reliability of silver plated copper filler has be a doubt to replace...
In the product development process, test planning can be a time-consuming task, in particular, the test methods for product reliability are usually selected manually because many documents must be referred to when selecting suitable test methods. To make this process more efficient, we have been researched methods to support test planning. In this paper a new automatic selection method for test plans...
In order to improve high temperature stability and water stability of the asphalt pavement, there have mainly the methods and measures as optimization grade, increasing asphalt amount, enhancing compactness and so on. Though these methods improve the high temperature stability and water stability to some extend, they are not fundamentally methods to solve the problems. This paper analyzes the indexes...
Pneumatic cylinder is an important element in pneumatic fluid power systems, and its performance determines the system's performance. Efficient and economical production requires highly reliable machines and equipment, so its reliability must be grasped. However, there were no evaluating standard and test methods in ISO standard. The paper presents a method about the reliability test circuit of pneumatic...
The reliability of temperature controlled crystal oscillator designs can be improved through process optimization and controlling key process variables. Industry demands for a highly reliable TCXO combines the need for the frequency accuracy of complex oscillator designs with long-term reliability. A project intended to improve the long-term reliability focused on key process steps of oscillator thick...
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