modulus. The first one is called the 'static method' that isthe way to measure the deformation strain that are corresponded to applied force using the strain gage. In other way, 'kinetic method' can measure theYoung's modulus using 'sonic resonance test' and 'pulse echo overlap.' In sonic resonance test, sonic wave or impulse are applied tothe specimen for finding the resonance frequency of t
the microcantilever must be previously biofunctionalized and thiscan be a complex task especially when arrays of microcantilevers are employed.
In contrast tothe static case, the dynamic mode does not require the functionalization of only one cantilever surface, as thecantilever resonance frequency change depends on thetotal mass adsorbed on both sides. In this mode, the microcantilever is
test specimen. Couplant is generally necessary because the acoustic impedance mismatch between air and solids (i.e. such as thetest specimen) is large. Therefore, nearly all ofthe energy is reflected and very little is transmitted intothetest material. The couplant displaces the air and makes it possible to get more sound energy intothetest specimen so that a usable ultrasonic signal can be
Test를 위해 Mechanical Bonding Test를 실시하여 Sn-Pb Solder와 Pb-Free Solder 간의 차이를 확인하고 Pb-Free Solder중에서도 각 재료마다의 Mechanical Bonding Test를 실시하여 Bonding Force를 체크한다. 보통 Soldering 된 제품이 받는 Stress 는 Tensile Stress 보다는 Shear Stress 가 주요하기 때문에 Solder 선택 시에는 Solder의 Tensile Property
the research in a way that the requisite data can be gathered and analyzed to arrive at solution. We will follow the six basic aspects to design our research. They are the purpose ofthe study, the types of investigation, the extent of researcher interference, the study setting, the unit of analysis, the time horizon ofthe study.
Purpose ofthe study: Hypotheses testing
We want to explain th
to improve the heat performance of resulting nanocomposites. However, the effective thermal conductivity of carbon-based nanocomposites is strongly influenced by the Kapitza interfacial resistance.
In this study, a comparison between carbon nanotubes and graphene sheet nanocomposites that takes into account dispersion patterns ofthe nanoinclusions andthe Kapitza resistance is performed by me
is 0.18 and thisis comprised in the range oftheory, andthe value from the second experiment is 0.16 which also comes under the range oftheory. In case of specimen no.1, there was an error of 12.6% but the Poisson's ratio is highly appropriate. From this, we can analogize the Poisson's ratio has nothing to do with strength, but is related tothe materials.
4. Shear Modulus of Elasticity
the situation on mixing day, so water/cement ratio was increased to 57.58% and 67.15% of normal required value.
Relationship with tensile strength came out similar totheoretical value so that cylinder were manufactured right except for the weakened strength,
- Elastic modulus showed 18~25% of error since compressive strength did not reach proportion strength. It is secondary result as it can'
can anticipate how consumer's trend change in beer market. And also, We wanna study twenties' beer consumption pattern.
As a result of two experiment, we will notify our opinion to Hite beer company to persuade launching new beer brand for twenties.
Preceding Reseach
Preceding Research Analysis.
According tothe current data, an amount of imported beer is increasing massively. Look at