بررسی شکست نمونه های بتنی تحت خمش با استفاده از روش انتشار آوایی

اختصاصی از فی فوو بررسی شکست نمونه های بتنی تحت خمش با استفاده از روش انتشار آوایی دانلود با لینک مستقیم و پر سرعت .

محل انتشار: دهمین کنگره بین المللی مهندسی عمران تبریز

تعداد صفحات: 8

نوع فایل : pdf

استاندارد ASTM E290 در خصوص نحوه انجام تست خمش و جزییات آن

اختصاصی از فی فوو استاندارد ASTM E290 در خصوص نحوه انجام تست خمش و جزییات آن دانلود با لینک مستقیم و پر سرعت .

استاندارد ASTM E290

در خصوص نحوه انجام تست خمش و جزییات آن

نسخه 2013

10 صفحه

Standard Test Methods for
Bend Testing of Material for Ductility

Scope
1.1 These test methods cover bend testing for ductility of
materials. Included in the procedures are four conditions of
constraint on the bent portion of the specimen; a guided-bend
test using a mandrel or plunger of defined dimensions to force
the mid-length of the specimen between two supports separated
by a defined space; a semi-guided bend test in which the
specimen is bent, while in contact with a mandrel, through a
specified angle or to a specified inside radius (r) of curvature,
measured while under the bending force; a free-bend test in
which the ends of the specimen are brought toward each other,
but in which no transverse force is applied to the bend itself
and there is no contact of the concave inside surface of the
bend with other material; a bend and flatten test, in which a
transverse force is applied to the bend such that the legs make
contact with each other over the length of the specimen.
1.2 After bending, the convex surface of the bend is
examined for evidence of a crack or surface irregularities. If
the specimen fractures, the material has failed the test. When
complete fracture does not occur, the criterion for failure is the
number and size of cracks or surface irregularities visible to the
unaided eye occurring on the convex surface of the specimen
after bending, as specified by the product standard. Any cracks
within one thickness of the edge of the specimen are not
considered a bend test failure. Cracks occurring in the corners
of the bent portion shall not be considered significant unless
they exceed the size specified for corner cracks in the product
standard.
1.3 The values stated in SI units are to be regarded as
standard. Inch-pound values given in parentheses were used in
establishing test parameters and are for information only.
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish

appropriate safety and health practices and determine the

applicability of regulatory limitations prior to use.

تحقیق دستگاه خمش 3 نقطه three point bending test

اختصاصی از فی فوو تحقیق دستگاه خمش 3 نقطه three point bending test دانلود با لینک مستقیم و پر سرعت .

در این پکیج که شامل 4 فایل pdf میباشد به بررسی دستگاه خمش 3 نقطه پرداخته شده است
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