Effect of Plastic Prestrain on High Cycle Fatigue of Ti–6Al–4V

Influence of uniaxial and biaxial pre-straining on the high cycle fatigue performance of DP590 steel

Bending fatigue prediction accuracy of steel wheel can hardly be guaranteed without clearly understanding the influence of stamping process on fatigue. In this research, multi-step stamping processes of spoke were analysed by different finite element simulation techniques. Major influences of stamping process on fatigue property were distinguished. Data-mapping technique was used to transfer information between stamping and fatigue analysis models. Difference material experiments were carried out to research the influence of prestrain on material properties. Modified E-N function was established according to the theoretical analysis and material experiment results. Bending fatigue finite element simulation was carried out, and result matched experiment well both in position and cycle life.

Integration of multi-step stamping effects in the bending fatigue analysis of a steel wheel

A system for facilitating plasma processing tool component management across plurality of tools is provided. The system includes means for receiving first component data for first plurality of components, including identification and usage history for a first plurality of components, at first database associated with first tool. The system also includes means for receiving second component data for second plurality of components at second database associated with second tool, which is different from first tool. The system further includes means for synchronizing first and second component data with third database. The synchronizing includes synchronizing between third database and at least one of first and second database rules that govern usage of at least one component of first and second plurality of components. The third database is coupled to exchange data with plurality of tools. The system yet also includes means for obtaining information, using rules and usage history data about given component prior to performing one of replacement, analysis, and maintenance.

Component-tracking system and methods therefor

A computer-implemented method for performing data management in a plasma processing system is provided. The method includes providing a recipe-and component control module (RACCM). The RACCM is a server that includes a plurality of intelligent agents, which are configured to interact with the plurality of components. The RACCM also includes a coordinating agent, which is configured to receive processed data from the plurality of intelligent agents. The RACCM further includes a set of provisional agents, which is configured to perform recipe management by distributing at least part of a recipe to at least one of the plurality of intelligent agents and the coordinating agent.

Methods for performing data management for a recipe-and-component control module

In order to clarify the effect of a small prestrain on the fatigue strength of a carbon steel, the fatigue behaviour of plain specimens of a eutectoid steel with spheroidal pearlite, previously subjected to a tensile prestrain, is investigated and compared with that of annealed and strain-aged specimens. It is found that a small prestrain of a few percent does not decrease the fatigue limit nor the crack initiation or propagation lives. Fatigue slip initiation, however, is accelerated by the small prestrain. It is also observed that cyclic strain ageing does not occur. From these results, it is inferred that dislocations are unpinned by the small prestrain and this causes fatigue slip to occur more readily, but the fatigue behaviour following slip initiation is not affected because the spheroidal cementite particles act as obstacles to further slip deformation and Stage I crack propagation.

Effects of small prestrain on the fatigue behaviour of spheroidal pearlite steel

Disclosed is a water dispersible varnish that can simultaneously solve problems involved in a coolant system of alternative coolant/refrigerant oil or a coolant system of natural coolant/refrigerant oil, that is, a problem of a reduction in volatile components and the like in heat curing treatment and a problem of resistance of a cured product of the varnish to the coolant system. The water dispersible varnish comprises a mixture of a specific heat curable resin as a base polymer, a specific vinyl monomer as a reactive diluent, an organic peroxide as a reaction initiator, and water.

Water dispersible varnish, motor compressor using the water dispersible varnish, method for manufacturing the motor compressor, and refrigerator/air conditioner equipped with the motor compressor

To obtain water-dispersible varnish used in an alternative refrigerant/refrigerating machine oil refrigerant system or a natural refrigerant/refrigerating machine oil refrigerant system, the water-dispersible varnish being capable of solving two problems, namely, reducing the volatile components and the like during thermal curing and resistance of the cured varnish to the refrigerant system, wherein the water-dispersible varnish has a specific thermosetting resin as base polymer, a specific vinyl monomer as reactive diluent, organic peroxide as reaction initiator, and water mixed therein.

Water-dispersible varnish

The present invention is a solvent-free varnish composition characterized by comprising: a thermosetting resin (A) having two or more (meth)acryloyl groups in the molecule; a thermosetting resin (B) having one or more epoxy groups in the molecule; a monofunctional vinyl-based monomer having an ether bond or an ester bond; an organic peroxide having a 10-hour half-life temperature of 40oC or higher; and a curing catalyst for epoxy resins. The composition is further characterized in that the mixed resin comprising the thermosetting resin (A) and the thermosetting resin (B) has an epoxy equivalent of 500-5,000. This solvent-free varnish composition, during the curing step, is low in energy loss and cures in a short time. The varnish composition can be used as an insulating varnish giving a cured object which, even when exposed to a high-temperature, high-pressure refrigerant system environment including a refrigerant and a refrigerating-machine oil, is less apt to release oligomers or the like.

Solvent-free varnish composition, insulated coil, process for producing same, rotary device, and closed electric compressor

본 발명은, 1분자 중에 2개 이상의 (메타)아크릴로일기를 갖는 열경화성 수지 (A)와, 1분자 중에 1개 이상의 에폭시기를 갖는 열경화성 수지 (B)와, 에테르 결합 또는 에스테르 결합을 갖는 단관능성 비닐계 모노머와, 10시간 반감기 온도가 40℃ 이상인 유기 과산화물과, 에폭시 수지용 경화 촉매를 포함하고, 열경화성 수지 (A)와 열경화성 수지 (B)의 혼합 수지의 에폭시 당량이 500~5000인 것을 특징으로 하는 무용제형 바니시 조성물이다. 이 무용제형 바니시 조성물은, 경화 처리 공정 중에 있어서 에너지 로스가 적고 또한 경화 시간이 짧음과 아울러, 고온 고압 하에 있는 냉매 및 냉동기 오일을 포함하는 냉매계 환경에 노출되더라도 올리고머 등의 석출이 발생하기 어려운 경화물을 제공하는 절연 바니시로서 이용할 수 있다.

Toshifumi Kanri

Papers

Effects of small prestrain on the fatigue behaviour of spheroidal pearlite steel

Water dispersible varnish, motor compressor using the water dispersible varnish, method for manufacturing the motor compressor, and refrigerator/air conditioner equipped with the motor compressor

Water-dispersible varnish

Solvent-free varnish composition, insulated coil, process for producing same, rotary device, and closed electric compressor

무용제형 바니시 조성물, 절연 코일 및 그 제조 방법, 회전기, 및 밀폐형 전동 압축기