18 Nisan 2015 Cumartesi

MICRO TENSILE TEST MACHINE


Due to scale effects, nanostructures are expected to show different mechanical properties from their bulk counterparts. In this chapter, several experimental techniques that could be used to measure mechanical properties of nanostructures are briefly reviewed, which include the classical tensile test. The main advantages and limitations of each technique are outlined. Tensile testing is straightforward and reliable, as the stress state in the specimen tends to be uniform. The main requirements for tensile testing at the micro scale are discussed, and the state of the art is reviewed with an emphasis on micro/nano specimen based nano tensile tests.

Engineering and design are based on metrology and instrumentation, because you cannot design while you do not know what you have. When starting to solve this problem you are aware of that there are need to some special devices. Also manufacturing has many serial and interconnecting processes and one of the most important steps is quality control. Because using material must have intended properties and it performs that in the expected time. In quality control process, material is experimented by many tests and micro tensile test is one of them. Micro tensile test measure the strain-stress according to elongation of specimen and applied force until fracture. The test results give young’s modulus, poison ratio, yield strength, ultimate strength, fracture and deformation. The usage areas of the micro tensile test machine are engineering, university laboratories, R&D, biomedical and analytical medical and the usage purposes of the micro tensile test machine are quality control, metrology and material characterization.

Micro tensile test and tensile test have difference properties from each other. Micro tensile test’s specimen dimensions are smaller than tensile test’s specimen. Also micro tensile test machine do not need more force as against to tensile test machine. In addition the more transportability and more ergonomic are one of the main differences of micro tensile test machine. The motivation, originality, and major contributions of this work is;

Various experiments and micro scale modeling have shown that the mechanical behavior of nanostructured materials could be remarkably different from their bulk counterparts. However, exploring material behavior at the nanoscale is hindered by the difficulties of conducting well-instrumented mechanical testing. Micro and Nano tensile testing is more straightforward and precise than the other testing methods, but it encounters significant challenges. The motivation of this work is to develop in first step a micro tensile testing instrument for characterizing 1D micro structures, aiming at revealing novel material behavior at the micro scale, and understanding the underlying material deformation mechanisms.

The main originality of this work is the realization of a novel modular micro tensile stage designed and developed using local source and that can be used for in-situ microscopy mechanical testing of individual 1D micro structures.



 Areas of Usage                                                         
oEngineering
oUniversity Laboratories
oR&D
oBiomedical
oAnalytical medical

Purposes of Usage
oQuality Control
oMetrology
oMaterial Characterization


Linear motion system




Servo Motor



Pulse Card


Driver




Micro Tensile Test Machine

Wrong Specimen Result