摘要：This study first investigated cracks on the surface of an actual steel strip. Formulating the Anand model in ANSYS software, we then simulated the stress field in the molten pool of type 304 stainless steel during the twin-roll casting process. Parameters affecting the stress distribution in the molten pool were analyzed in detail and optimized. After twin-roll casting, a large number of transgranular and intergranular cracks resided on the surface of the thin steel strip, and followed a tortuous path. In the molten pool, stress was enhanced at the exit and at the roller contact positions. The stress at the exit decreased with increasing casting speed and pouring temperature. To ensure high quality of the fabricated strips, the casting speed and pouring temperature should be controlled above 0.7 m/s and 1520℃, respectively.

摘要：Cu pillar bump offers a number of advantages for flip chip packaging,compared to the conventional solder ***,due to its rigidity structure,Cu pillar bump introduces a lot of stress to the chip,which causes the failure of packaging structures,especially for the advanced node devices which typically have brittle low K dielectric *** this paper,for the first time we propose two types of Cu pillar structures to reduce the *** first Cu pillar structure has bigger Cu dimensions at the *** other one is designed to add an additional Cu pad under the Cu pillar *** element analysis is used to study the stress of the both structures,and it is found that with the increase in pillar bump contact area over the chip surface,the stress decreases in both *** also indicate that the Cu pillar bump undercut induces higher stress,and thin Cu6 Snss intermetallic compound has less impact on the stress during flip chip mount *** study provides a novel way to improve the reliability by reducing the stress in the Cu pillar bump related packaging.

摘要：Orthopedic bone plates are most commonly used for bone fracture fixation for more than 100 *** bone plate design had evolved over time overcoming many challenges such as insufficient strength and excessive plate–bone contact affecting the blood ***,it is only made of two materials,either stainless steel(AISI 316L)or titanium(Ti–6Al–4V).There are two main limitations of metallic bone implants,namely stress shielding and the problem of malocclusion caused by the displacement of the fracture site during *** overcome the two problems,a new bone plate design with the incorporation of auxetic structures is proposed in this *** study aims to use auxetic structure section in the bone plate that would decrease the stiffness of the region,thereby mitigating the stress-shielding effect and at the same time act as a deformable section to enable intra-operative bending for effective alignment while having enough bending strength and *** different auxetic structures namely re-entrant honeycomb and missing rib structures were *** auxetic structure incorporated bone plates were designed,finite element analysis was done,fabricated using direct metal laser sintering technique,and *** results indicate that the re-entrant honeycomb structure incorporated bone plates serve as an effective bone design compared to the conventional bone plate design,in terms of stress shielding and intra-operative bending while offering similar mechanical and bending strength.

摘要：Finite Element Method is used in this article to analyze the stress of CR superferric *** force and the stress caused by this force are *** thermal stress and strain of the coil caused by cooling down is also *** result will be taken as a check for the design of the coil and coilcase,and also as a reference for the optimization of further design and quench protection.

摘要：Despite the stigma that is associated with law enforcement officers receiving mental health resources and treatment to combat secondary traumatic stress,it is widely the most effective form for recovery and having a fulfilling *** enforcement officers are superheroes and,they are known for saving the *** is why it is critical for mental health offerings to be normalized in law enforcement agencies and constant evaluation of the psychological and cognitive well-being of ***,the stress of the profession will not go away,but having resources and incentives to address several factors that officers face will assist with their overall feeling about the important work they *** such,it is recommended that law enforcement agencies adopt programs to treat secondary traumatic stress,such as Critical Incident stress Debriefing,Peer-Support Program,and Crisis Intervention *** there is no perfect program,these programs are designed to reduce the risk of serious injury or death during an emergency interaction between citizens and law enforcement ***,it is the responsibility of those charged with protecting law enforcement officers to understand the stress and how it affects the mind and body of those officers in managing life,work,and citizens.

摘要：In this paper we propose an analyzing of the response of a stress optical fiber sensor of which we proposed several design. We show that an optical fiber sensor with these designs can covenanting allow the measuring the force/stress applied to a mechanical structure or which it is linked, by optimizing the uses of appropriate materials for constituting the sensor support. The experiment that we introduce to validate our approach based in principles includes design with a support bearing a multimode optical fiber organized in such a way that the transmitted light is attenuated when the fiber-bending angle coming from stitching in holes of the support is modified by the effects of the force/stress applied to the optical fiber sensor realized in this way. The tests realized concern the most relevant parameters that define the performances of the stress sensor that we propose. We present the problems that we to solved for the optimization of the sensor for selecting the more efficient material for the optical fiber sensor support related to a relevant choice of optical fibers.

摘要：Optimisation of effective design parameters to reduce tooth bending stress for an automotive transmission gearbox is presented. A systematic investigation of effective design parameters for optimum design of a five-speed gearbox is studied. For this aim contact ratio effect on tooth bending stress by the changing of contact ratio with respect to pressure angle is analysed. Additionally, profile modification effects on tooth bending stress are presented. During the optimisation, the tooth bending stress is considered as the objective function, and all the geometric design parameters such as module, teeth number etc. are optimised under two different constraints, including tooth contact stress and constant gear centre distance. It can be concluded that higher the contact ratio results in a reduced tooth bending stress, while higher the pressure angle caused an increase in tooth bending stress and contact stress, since decreases in the contact ratio. In addition, application of positive profile modification on tooth reduces tooth bending stress. All of the obtained optimum solutions satisfy all constraints.

摘要：随着汽车产业的蓬勃发展,满足车规质量标准的IC无疑是各集成电路设计生产企业必争的高端高利市场领域。但是车规领域的质量需求门槛极高,需要设计,加工,筛选共同的努力才能达到车规IC的品质需求。本文介绍一种通过在测试筛选阶段加入基于功能的Burn-in(B.I)stress,实现对IC逻辑器件早期失效的筛选。建立车规级筛选中不可缺少的一环。

摘要：Purging plug with slits is widely used in the secondary refining process,and its service life determines the downtime and production *** achieve a good performance in service life,optimizing the geometric structure of the slit,which can alleviate the stress concentration around the slit,was employed using the finite plate ***,the performance of the purging plugs with different shapes of slits in the refining effect was investigated by conducting the water model *** numerical simulation results showed that the appropriate shapes of slits could alleviate the stress concentration *** the water model experiment,the mixing time of the purging plug with circular slits is lesser than that of the purging plug with rectangular slits when the gas flow is less than 6.02 L/*** with the rectangular slits,the circular slits are detrimental to smaller and well-distributed ***,the inclusion removal rate of the purging plug with circular slits is approximately 10%larger than that of the purging plug with the rectangular slits.

摘要：Fingers are the basic components of anthropomorphic *** present,most anthropomorphic fingers utilize rigid joints,which have obvious fabrication and assembly complexities as well as limited flexibility and ***,some anthropomorphic fingers were attempted to utilize compliant joints learned from bioinspiration,but they have a limited self-resetting ability and lateral deformation resistance,as well as occupying a large space and having a non-anthropomorphic *** this paper,nine compliant joints for anthropomorphic fingers were analyzed using Finite Element Analysis(FEA),based on which two combined compliant joints were proposed,and the optimal one was obtained through FEA and *** anthropomorphic finger that embeds parts of the compliant joint into the adjacent phalanxes was then ***,the anthropomorphic finger was fabricated and experiments were *** results show that the anthropomorphic finger with the proposed combined compliant joints has a better self-resetting ability and lateral deformation resistance while ensuring a large range of motion similar to that of the human finger,and the required actuating force is ***,the embedded joint structure can reduce the occupied space of the joint so as to improve the anthropomorphic appearance of the finger,and enhance its lateral deformation resistance.