In recent years, various auxetic material structures have been designed and fabricated for diverse applications that utilize normal materials follow Hooke's law but still show the properties of negative Poisson's ratios (NPR). One potential application is body protection pads are comfortable to wear effective in protecting parts by reducing impact force preventing injuries high-risk individuals such as elderly people, industrial workers, enforcement military personnel, athletes. This paper...

Auxetic materials, known as materials with negative Poisson’s ratio (NPR), have many promising application areas. However, there are only few natural and man-made such certain living bone tissues, rocks minerals, polymeric honeycombs, microporous polytetrafluoroethylene (PTFE), foams, carbon-fiber-reinforced epoxy composite laminate panels that possess this property. In recent years, various auxetic material structures been designed fabricated for diverse applications utilized normal which...

Negative Poisson’s ratio (NPR) materials, also known as auxetic have many promising application areas. In recent years, various material structures been designed and fabricated for diverse applications that utilized normal materials which follow Hooke’s law but still show the properties of negative ratios. light this, efforts are made to apply body protection pads comfortable wear effective in protecting parts by reducing impact force preventing injuries high-risk individuals such elderly...

Abstract The U.S. Department of Labor projects an increase in the number engineers USA from 1.68 million to 1.82 by 2026. fastest-growing demands are Data Science and Machine Learning, Mechatronics Robotics. term 'Mechatronics' is expanding its horizon due current digital disruptions industrial automation. Starting with a concept leveraging synergy between mechanical electrical engineering system theoretic prospect, mechatronics now encompasses several disciplines, including intelligent...

Engineers must routinely predict how structural systems will vibrate after design modifications are made to the mass, damping, or stiffness properties of components. To reduce cost product development, sensitivity prediction methods desired that can be applied using only empirical data from an initial prototype. Embedded functions derived solely have previously been (a) identify optimal for reducing linear vibration resonance problems and (b) change in frequency response. In this previous...

Finite element analysis along with DOE scheme has been performed to obtain robust design of connecting rod assembly. An was conducted five loading steps. Fatigue done using commercial software FEMFAT and fatigue safety factors at the interested regions such as shank area small end big were calculated. 27 cases 3 levels are constructed by experiment. Each case is simulated find most influential factors. Response for this study, maximum Von-Mises stress, used determine main Among factors,...

The effect of the joint condition automotive muffler shell and baffle on radiated noise from Is studied. Shell vibration characteristics, especially shift In natural frequency change in response amplitude, was identified finite element analysis modal tests for various conditions between baffle. When there is heat expansion inner pressure exhaust 9as with elliptical cross section, expands out, construct gap baffles. This causes more degrees freedom shift. By welding to baffles or using a dual...

Computer-aid engineering design is a compulsory course for undergraduate students majoring in Agricultural Engineering both China and the USA. In order to find suitable methods improve under rapid development of high technology systematic comparison objectives, contents, teaching method, facilities environments offered by Chinese university US are made. A questionnaire including interests students, difficulties course, usefulness knowledge, methods, etc. was designed collect information...

A new method for identifying multiple damages in a structure using embedded sensitivity functions and optimization algorithms is presented this work. Optimization techniques are used to minimize the difference between measured frequency response from damaged predicted FRFs baseline structure. The FRF calculated directly undamaged system data their Taylor series expansions. optimal damage parameters identified engineering units as changes stiffness, damping, or mass through process minimizing...

<div class="htmlview paragraph">In the development and manufacture of vehicle components systems, it is often necessary to quickly identify optimal design modifications for mitigating noise vibration problems meet production schedule. To address this need, experimental techniques determining sensitivity forced response changes in mass, damping or stiffness properties are great use. In order distinguish physical system from nonlinear input-output distortion, identifying models mechanical...

Abstract This research is aimed at proposing an enhanced re-entrant hexagonal structure and examining its auxetic behavior in compressive or tensile load conditions. An integrated experimental finite element analysis (FEA) approach was used to investigate the of proposed structures combination with polymeric materials (thermoplastic polyurethane (TPU) such as Ninjaflex® Semiflex®). We focused on effect nonlinearity overall stiffness shock-absorption performance body protection pads. FEA...

Abstract This paper presents design considerations of an adjustable flexible auxetic structure used in soft wearable suits with a Cross Chiral Honeycomb (CCH) structure. In order to macro-auxetic elastic flexibilities the suit, it is important develop unit cell adjustability stiffness. Airbag inflation and deflation mechanisms on stiffness pads foam play key roles either protection human body or assistance motion through reversible configurations Periodic cellular structures were first...

Abstract College of Engineering, Architecture, and Technology (CEAT) at the Oklahoma State University (OSU) annually offers a 3-week high school-to-college transitional program called Summer Bridge for incoming engineering freshmen. The summer bridge is hands-on, experience-based learning that gives freshmen good head-start to their college careers greatly increases likelihood success. Various departments actively participate in this by offering discipline-specific hands-on experimental or...

A structural damage identification method based on sensitivity functions and optimization algorithms is discussed in this paper. The suggested analysis technique can be effectively used for the process because it requires only measured frequency response to calculate of system responses each component parameter. algorithm finds best combination changes design variables minimize object function that defined as difference between calculated FRFs damaged structure. Various parameters factors...

Various structural health monitoring (SHM) techniques utilizing vibration signals have been developed for identification of damages in a structure. Many these studies are based on sensitivity analysis, finite element model (FEM) updating, and optimization techniques. FEM updating technique is one the major that iteratively minimizes difference between modal parameters measured from real structure corresponding analytical predictions. This method would be more beneficial typical continuous...

Unlike shot peening, blasting is a process that primarily uses balls to remove foreign substances from metal surfaces. Shot classified into air-blowing and impeller-impact types. The latter widely used in commercial large-scale blasting. This study proposes new control cage with concave or convex shape improve coverage uniformity the type blaster. effectiveness of proposed verified using discrete element methods experiments. Moreover, optimal design terms mass flow, coverage, confirmed....

Several studies have aimed at improving sensor performance through deep learning. In this paper, we explore the feasibility of using advanced machine learning techniques, specifically Kriging and Super Resolution Generative Adversarial Networks, to enhance accuracy simulated force sensitive resistor matrices with a low number sensors. is geostatistical method that uses spatial correlations interpolate or predict values unsampled locations, while Networks are type generative adversarial...

Abstract Auxetic structures have shown great potential in the development of pressure sensors, owing to their unique mechanical properties. Such exhibit a negative Poisson’s ratio due controlled deformations opposite lateral direction that typical materials. This article aims explore applications auxetic properties, and manufacturing techniques employed. Additive has facilitated creation by enabling deposition materials layer-by-layer. The use computer-aided design (CAD) software allows for...

Abstract This research is aimed at proposing an enhanced re-entrant hexagonal structure and examining its auxetic behavior in compressive or tensile load conditions. Auxetic materials, also known as materials with negative Poisson’s ratio (NPR), have been designed fabricated for diverse applications that utilized normal which follow Hooke’s law but still show the NPR properties. One of major body protection pads are comfortable to wear effective protecting parts by reducing impact force...

To improve noise, vibration, and harshness (NVH) performance in a mechanical system, engineers make changes the mass, damping, or stiffness properties of components system. A system response prediction method using sensitivity function is suggested to reduce cost design modification process. Embedded functions derived solely from empirical data have been applied identify optimal modifications for reducing vibration resonance problems. In this paper, those are used predict behavior with...