Developing Abrasion Test Standards for Evaluating Lunar Construction Materials
نویسندگان
چکیده
منابع مشابه
developing a pattern based on speech acts and language functions for developing materials for the course “ the study of islamic texts translation”
هدف پژوهش حاضر ارائه ی الگویی بر اساس کنش گفتار و کارکرد زبان برای تدوین مطالب درس "بررسی آثار ترجمه شده ی اسلامی" می باشد. در الگوی جدید، جهت تدوین مطالب بهتر و جذاب تر، بر خلاف کتاب-های موجود، از مدل های سطوح گفتارِ آستین (1962)، گروه بندی عملکردهای گفتارِ سرل (1976) و کارکرد زبانیِ هالیدی (1978) بهره جسته شده است. برای این منظور، 57 آیه ی شریفه، به صورت تصادفی از بخش-های مختلف قرآن انتخاب گردید...
15 صفحه اولDetermination of scratching energy index for Cerchar abrasion test
Rock abrasivity is an essential factor for selecting cutting tools, estimating tool wear and life, and ultimately, matching various mechanized excavation systems with a given geologic condition. It also assists engineers to determine economic limits of different cutting tools and machines used in civil and mining projects. The Cerchar abrasion test is a simple and most widely used method for ro...
متن کاملProperty maps for abrasion resistance of materials.
Using mechanics models of contacting surfaces under both normal and tangential loads, a mechanistic framework has been developed for assessing material resistance to initiation of abrasive damage. Solutions are presented for the critical loads to initiate yielding and cracking at blunt contacts, as well as those to attain a prescribed plastic penetration depth and cause cracking from within the...
متن کاملExploring Standards and Developing a Measure for Evaluating Iranian EFL Teachers’ Professional Competence in the Private Sector
The primary foundation of teacher evaluation is establishing standards for assessing the optimal characteristics of qualified teachers. The present study aimed at exploring standards of professional competence of adult-level Iranian EFL teachers in the private sector and developing a questionnaire to assess their professional competence. To this end, initially, the members of the professional...
متن کاملA SANDBLAST ABRASION TEST FOR SYNTHETIC AGGREGATE EVALUATION by James
The need tor an aggregate abrasion test which effectively differentiates between the quality of aggregates of various unit weights prompted the development of a new test apparatus. The method selected uses air-driven sand as the abrading mechanism. Research findings based on tests of five natural and forty-seven synthetic aggregates tentatively indicate that the sandblast test is statistically ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: SAE International Journal of Aerospace
سال: 2009
ISSN: 1946-3901
DOI: 10.4271/2009-01-2377