Papers by Dr. Piyush Gohil
Programmable Device Circuits and Systems, 2011
Pressure Vessels are commonly used device in Chemical and Process Industries. Until recently all ... more Pressure Vessels are commonly used device in Chemical and Process Industries. Until recently all the primary analysis method was hand calculations [1]. Now a day Computer advances have made Finite element analysis a practical tool in the study of Pressure Vessels, especially in determining Total Deformation, Equivalent (Von mises) Stress, Equivalent (Von mises) Elastic Strain. Having tested three dimensional models, the basic conclusion is that Finite element analysis is a most powerful tool when used it correctly. It depends on the desired solutions. There are different methods exists, which gives faster run times and less error. Wind engineering analyses effects of wind in the natural and the built environment and studies the possible damage inconvenience or benefits, which may results from wind. In the field of engineering it includes strong winds, which may cause discomfort, as well as extreme winds, such as in a heavy storm, which may cause wide spread destruction.
Fibers and Polymers, Aug 7, 2021
The influence of interphase on the tensile property of composite is examined in the present study... more The influence of interphase on the tensile property of composite is examined in the present study. For this, fabrication of composite (FOC) is carried out using natural fibers: bamboo fiber and jute fiber and polyester resin as per the hand layup technique. The fibers are arranged in a longitudinal direction with varying the volume fraction of fiber (vf). The tensile testing of fibers, polyester and composites are held on the universal testing machine (UTM) and evaluated experimental tensile properties: tensile strength (TS) and elastic modulus (E). The mathematical models are proposed to measure the influence of interphase on the longitudinal elastic modulus of composite (Ecl) for longitudinally placed unidirectional fiber-reinforced polymer composites (LUDFPC) with varying interphase volume fraction (vi). The different interphase property variations: linear variation, hyperbolic variation, parabolic variation, powerlaw variation and exponential are considered in the modeling of co...
Friction, May 12, 2017
The cotton fiber reinforced polyester composites were fabricated with varying amount of graphite ... more The cotton fiber reinforced polyester composites were fabricated with varying amount of graphite fillers (0, 3, 5 wt.%) with a hand lay-up technique. Wear tests were planned by using a response surface (Box Behnken method) design of experiments and conducted on a pin-on-disc machine (POD) test setup. The effect of the weight percentage of graphite content on the dry sliding wear behavior of cotton fiber polyester composite (CFPC) was examined by considering the effect of operating parameters like load, speed, and sliding distance. The wear test results showed the inclusion of 5 wt.% of graphite as fillers in CFPC increase wear resistance compared to 3 wt.% of graphite fillers. The graphite fillers were recommended for CFPC to increase the wear resistance of the material. A scanning electron microscope (SEM) was used to study the wear mechanism. To predict the wear behavior of the composite material, comparisons were made between the general regression technique and an artificial neural network (ANN). The conformation test results revealed the predicted wear with the ANN was acceptable when compared with the actual experimental results and the regression mathematical models.
Several billion tons of fillers and reinforcements are used annually in the plastics industry, an... more Several billion tons of fillers and reinforcements are used annually in the plastics industry, and there is a huge potential market for recyclable, energy efficient and more environmentally friendly composite materials. The use of medium strength and low strength fiber available in nature are having enough potential for other application where high strength are not critical but it can provide a feasible range of alternative materials to suitable conventional material. The systematic experimental study using developed mould-punch set up and testing aids was carried out for the effect of volume fraction of reinforcement on longitudinal elastic modulus of unidirectional cotton fiber reinforced polyester composites. The testing was carried out as per ASTM D3039/D3039M-08. The micro mechanics assessment of obtained experimental results with models available in literature for longitudinal elastic modulus forms an equally important constituent of present work.
Innovations in corrosion and materials science, Apr 27, 2016
DOAJ (DOAJ: Directory of Open Access Journals), Jun 1, 2010
During a vehicle development program, load data representing severe customer usage is required. T... more During a vehicle development program, load data representing severe customer usage is required. The dilemma faced by a design engineer during the design process is that during the initial stage, only predicted loads estimated from historical targets are available, whereas the actual loads are available only at the fag end of the process. At the same time, changes required, if any, are easier and inexpensive during the initial stages of the design process whereas they are extremely costly in the latter stages of the process. The use of road profiles and vehicle models to predict the load acting on the whole vehicle is currently being researched. This work hinges on the ability to accurately measure road profiles. The objective of the work is to develop an algorithm, using MATLAB Simulink software, to convert the input signals into measured road profile. The algorithm is checked by the MATLAB Simulink 4 degrees of freedom half car model. To make the whole Simulink model more realistic, accelerometer and laser sensor properties are introduced. The present work contains the simulation of the mentioned algorithm with a half car model and studies the results in distance, time, and the frequency domain.
International Journal of Automotive and Mechanical Engineering, Jun 30, 2010
During a vehicle development program, load data representing severe customer usage is required. T... more During a vehicle development program, load data representing severe customer usage is required. The dilemma faced by a design engineer during the design process is that during the initial stage, only predicted loads estimated from historical targets are available, whereas the actual loads are available only at the fag end of the process. At the same time, changes required, if any, are easier and inexpensive during the initial stages of the design process whereas they are extremely costly in the latter stages of the process. The use of road profiles and vehicle models to predict the load acting on the whole vehicle is currently being researched. This work hinges on the ability to accurately measure road profiles. The objective of the work is to develop an algorithm, using MATLAB Simulink software, to convert the input signals into measured road profile. The algorithm is checked by the MATLAB Simulink 4 degrees of freedom half car model. To make the whole Simulink model more realistic, accelerometer and laser sensor properties are introduced. The present work contains the simulation of the mentioned algorithm with a half car model and studies the results in distance, time, and the frequency domain.
V Chaudhary, P P Gohil* and A A Shaikh Department of Mechanical Engineering, Faculty of Technolog... more V Chaudhary, P P Gohil* and A A Shaikh Department of Mechanical Engineering, Faculty of Technology and Engineering, Charotar University of Science and Technology, Changa 388 421, Gujarat, India Department of Mechanical Engineering, Faculty of Technology and Engineering, M S University of Baroda, Vadodara, Pin -390 001, Gujarat, India Department of Mechanical Engineering, S.V. National Institute of Technology, Ichchhanath, Surat -395 007, Gujarat, India
As the fiber reinforced polymer matrix composites gives good strength and can work in rigorous en... more As the fiber reinforced polymer matrix composites gives good strength and can work in rigorous environmental conditions, nowadays more focus is given to study the behavior of these materials under different operating conditions. Due to the environmental concern focus on the natural fiber reinforced polymer matrix composite (NFRPC) is enhancing both in research and industrial sectors. Currently focus has been given to unify solid fillers with the NFRPC to improve its mechanical and tribo properties. Aligned to this, the present work discusses the effect of various weight fraction of fillers (Flyash, SiC and graphite) on the frictional behavior of natural fiber (cotton) polyester matrix composites. The specimen prepared with Hand lay-up process followed by compression molding. A plan of experiments, response surface technique, was used to obtain response in an organized way by varying load, speed and sliding distance. The test results reveal that different weight concentration of fill...
Programmable Device Circuits and Systems, 2011
Pressure Vessels are commonly used device in Chemical and Process Industries. Until recently all ... more Pressure Vessels are commonly used device in Chemical and Process Industries. Until recently all the primary analysis method was hand calculations [1]. Now a day Computer advances have made Finite element analysis a practical tool in the study of Pressure Vessels, especially in determining Total Deformation, Equivalent (Von mises) Stress, Equivalent (Von mises) Elastic Strain. Having tested three dimensional models, the basic conclusion is that Finite element analysis is a most powerful tool when used it correctly. It depends on the desired solutions. There are different methods exists, which gives faster run times and less error. Wind engineering analyses effects of wind in the natural and the built environment and studies the possible damage inconvenience or benefits, which may results from wind. In the field of engineering it includes strong winds, which may cause discomfort, as well as extreme winds, such as in a heavy storm, which may cause wide spread destruction.
Biomaterials in the form of implants (sutures, bone plates, joint replacements, etc.) and medical... more Biomaterials in the form of implants (sutures, bone plates, joint replacements, etc.) and medical devices (pacemakers, artificial hearts, blood tubes, etc.) are widely used to replace and/or restore the function of traumatized or degenerated tissues or organs, and thus improve the quality of life of the patients. The first and foremost requirement for the choice of the biomaterial is its acceptability by the human body. A biomaterial used for implant should possess some important properties in order to long-term usage in the body without rejection. The most common classes of materials used as biomedical materials are Metals, Polymers, Ceramics, and Composite. These four classes are used singly and in combination to form most of the implantation devices available today. This review should be of value to researchers who are interested in the state of the art of biomaterial evaluation and selection of biomaterials. Keywords—Application, Biomaterials, Human Anatomy
IOP Conference Series: Materials Science and Engineering, 2020
Vacuum assisted resin transfer moulding (VARTM) has become well known fibre reinforced composite ... more Vacuum assisted resin transfer moulding (VARTM) has become well known fibre reinforced composite (FRC) manufacturing technique for various applications like boat hull, automobile parts, wind blades, aircraft parts etc. As name suggests, vacuum is used to assist resin to flow inside fabric during impregnation. The flow of resin happens due to the pressure difference created due to vacuum supply pipe (at vacuum pressure) and resin supply pipe (at atmospheric pressure). The flow of resin bonds the fabric to make a solid part. Various parameters affect the quality of part produced by VARTM. In this paper effect of three process parameters were studied, which include number of layers, position of resin supply and vacuum supply location. Each parameter with three levels was studied to find the effect of these parameters on tensile strength and flow velocity. Jute and polyester resin were selected as material to prepare laminates. The experiments were performed as per Taguchi Orthogonal Ar...
Materials Today: Proceedings
Encyclopedia of Materials: Composites, 2021
Abstract Composite Material which are different from common heterogeneous materials come to the f... more Abstract Composite Material which are different from common heterogeneous materials come to the forefront of manufacturing a few decades ago because of their superior specific mechanical properties. The reduction of the non-renewable resources and increment in environmental pollution inspired investigators to emphasis on the improvement of environment friendly bio-based materials from renewable resources. The centrality of this investigate is related to critical judgment data to policy makers and prospective manufacturers within the commercialization stage of this modern bio composites as sustainable and green building materials. Studies specify that a vehicle weight reduction of 10% leads to reduction in fuel consumption up to 3%–7% for automotive industry. It was concluded that Poly Methyl Methacrylate (PMMA) bio composite may well be effectively reinforced by seashell Nano powder with superior properties at 12% seashell Nano powder substance taken after by 8% filled composite. This audit is planning to supply a brief outline of work that’s beneath way within the range of bio-composite inquire about and advancement, the logical hypothesis behind these materials, zones in which this investigate is being connected, and future work that is awaited.
Biomaterials in the form of implants (sutures, bone plates, joint replacements, etc.) and medical... more Biomaterials in the form of implants (sutures, bone plates, joint replacements, etc.) and medical devices (pacemakers, artificial hearts, blood tubes, etc.) are widely used to replace and/or restore the function of traumatized or degenerated tissues or organs, and thus improve the quality of life of the patients. The first and foremost requirement for the choice of the biomaterial is its acceptability by the human body. A biomaterial used for implant should possess some important properties in order to long-term usage in the body without rejection. The most common classes of materials used as biomedical materials are Metals, Polymers, Ceramics, and Composite. These four classes are used singly and in combination to form most of the implantation devices available today. This review should be of value to researchers who are interested in the state of the art of biomaterial evaluation and selection of biomaterials. Keywords—Application, Biomaterials, Human Anatomy
Journal of Physics: Conference Series, 2020
The primary factor that defines the final performance of any composite material is the fiber-matr... more The primary factor that defines the final performance of any composite material is the fiber-matrix interface. Hence, efficient amount of adhesion is needed for full-fledged performance of composite materials. When fibers are used without surface modification, they tend to produce composites with low strength. This in turn leads to weak adhesion and poor bonding between the fiber and matrix. Hence, there is a massive apprehension to alter the surface of fibers through various procedures, in order to overcome their intrinsic downsides and effectively employ these materials in countless applications. This paper deals with a review of prevailing research studies fixated on the surface treatment of fibers.
Fibers and Polymers, 2021
The influence of interphase on the tensile property of composite is examined in the present study... more The influence of interphase on the tensile property of composite is examined in the present study. For this, fabrication of composite (FOC) is carried out using natural fibers: bamboo fiber and jute fiber and polyester resin as per the hand layup technique. The fibers are arranged in a longitudinal direction with varying the volume fraction of fiber (v f ). The tensile testing of fibers, polyester and composites are held on the universal testing machine (UTM) and evaluated experimental tensile properties: tensile strength (TS) and elastic modulus (E). The mathematical models are proposed to measure the influence of interphase on the longitudinal elastic modulus of composite (E cl ) for longitudinally placed unidirectional fiber-reinforced polymer composites (LUDFPC) with varying interphase volume fraction (v i ). The different interphase property variations: linear variation, hyperbolic variation, parabolic variation, powerlaw variation and exponential are considered in the modeling of composite and measure its effect on E cl . The comparative study of proposed models with other researchers’ models is carried out. The validation of developed models is carried out using other researchers’ experimental data. The present study signifies the important outcome as v i should be around 15 % to 20 % of v f to predict E cl ; Parabolic variation is recommended for the prediction of E cl .
Drilling is one of the machining processes most widely applied to composite materials; neverthele... more Drilling is one of the machining processes most widely applied to composite materials; nevertheless, these materials are prone to delaminate when subjected to stress concentration during machining operations. The damage induced by this operation may reduce the component performance drastically. The present study aims to realize drilling of glass fibre reinforced plastics (GFRP) with reduced delamination. The effects of feed rates, spindle speeds and the geometrical characteristics of the drill on the resulting delamination factor values were compared. A plan of experiments, based on the orthogonal array, was established considering drilling with prefixed cutting parameters in hand lay-up GFRP material. The digital image of the induced damage is analyzed to find delamination factor.
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Papers by Dr. Piyush Gohil