Pemodelan Simulasi Tabung Penyerap Energi Crash Box Sebagai Teknologi Keselamatan Pasif Berbasis Software FEM (Finite Elemen Methode)

Crash box adalah salah satu komponen keselamatan pasif pada berbagai transportasiyang berfungsi sebagai perangkat penyerap energi tumbukan untuk mengurangi terjadinya cidera pada pengemudi maupun penumpang akibat tabrakan atau kecelakaan. Pada penelitian ini bertujuan untuk mengetahui nilai penyerapan energi dan pola deformasi yang dihasilkan pada crash box yang berbentuk tabung lingkaran satu segmen. Metode pada penelitian ini menggunakan eksperimen semu menggunakan simulasi software berbasis elemen hingga (finite elemen methode). Variable pada penelitian meliputi panjang tabung 300 mm dengan variasi tebal 1,5 dan 3 mm dan diameter tabung sebesar 120 mm. eksperimental semu crash box akan dilakukan uji tabrak quasi static dengan impactor masa 200 kg dan kecepatan 10 m/s. Simulasi pada crash box diobservasi berdasarkan nilai serapan energi, force reaction dan pola deformasi yang terbentuk. Hasil simulasi dapat diketahui bahwa nilai serapan energi tertinggi terdapat pada crash box tebal 3 mm sebesar 790000 Joule dan force reaction 230000 N. Dapat dilihat bahwa pola deformasi yang terbentuk cenderung buckling pada crash box tebal 1,5 mm dan membentuk pola concertina pada crash box tebal 3 mm.

Vertical Jump in National Volleyball-Basketball Team’s Women's in Albania

Volleyball and Basketball women’s have different performances from each other due to their special specifics of the game. From the specificity of their training, there are differences in the physical qualities of individual and team sports performance, where one of the elements is vertical jumping. This study is concentrated on two teams: Women’s Volleyball Team (V) and Women’s Basketball Team (B) 15 members each, focusing on 30 subjects. Players were measured in physical parameters; Age (V-24: B-27), Body Height (V-180.4cm; B-173.4cm), Body Weight (V-70.37kg; B-63.88kg), BMI (V-21.67 percent; B-20.93 percent). The players performed the test DJ60cm in the platform Leonardo® Ground Force Reaction Plate (GRFP) which expresses Force max (kN), Power max (w/kg), Time Contact (TCs), Air Time (TAs), TA/TCs. The results obtained by GRFP showed different team values of the two sports in the parameters of Fmax V65.19-B74.07n/kg, Pmax V31.26-B23.06w/kg, TCs V0.231-B0.198, TAs V0.436-B0.34 and TA/TCѕec V1.96ѕ-B1.71ѕec. Results revealed that V players jumped higher (p, 0.001) than B players. Finally, the Drop Jump60cm test has different performance between individual players, despite the fact that in the team average it turned out that Volleyball players is higher in this test. Drop Jump is the typical plyometric test. Furthermore, tests such as DJ can be a useful method for assessing differences and monitoring vertical jump training programs from collective sports.

Single Stage Autonomous Solar Water Pumping System Using PI and Fuzzy Controllers

Sustainable powerage and viable use of accessible energy assets have arisen as an commendable panacea for expanding carbon impression, draining petroleum derivatives, expanding a dangerous atmospheric deviation and changing meteorological situations. Flawless nature, silent activity and bountiful accessibility even at distant areas, have made the sunlight based energy finest form of RE accessible in the current situation .The work presents a introverted stage independent sun oriented photovoltaic exhibit take care of water siphoning framework utilizing a long-lasting magnet simultaneous engine. The crucial commitment of this work incorporates advancement of novel altered vector control, which improves the force reaction of the framework and improvement of a novel single stage variable advance size gradual conductance strategy, which gives a quick greatest force point following and dispenses with the need of transitional stage DC-DC converter. A corresponding indispensable control diminishes the mistake among reference and real value. The utilization of single stage geography has killed middle stage DC-DC converter and diminished the quantity of components, consequently bringing about decrease of the expense, intricacy and increment efficiency .The expansion of this activities rather than PI regulators that we need to Fuzzy and PI regulators .Utilizing this controllers step reaction of speed increases, Dc-connect voltage increases and force speed proportion is all the more then, at that point power stream will be improved. The framework execution has been examined through Matlab /simulink recreation investigation

APPLICATION OF DOMAIN INTEGRATED DESIGN METHODOLOGY FOR BIO-INSPIRED DESIGN- A CASE STUDY OF SUTURE PIN DESIGN

This paper investigates the design and development of bio-inspired suture pins that would reduce the insertion force and thereby reducing the pain in the patients. Inspired by kingfisher's beak and porcupine quills, the conceptual design of the suture pin is developed by using a unique ideation methodology that is proposed in this research. The methodology is named as Domain Integrated Design, which involves in classifying bio-inspired structures into various domains. There is little work done on such bio-inspired multifunctional aspect. In this research we have categorized the vast biological functionalities into domains namely, cellular structures, shapes, cross-sections, and surfaces. Multi-functional bio-inspired structures are designed by combining different domains. In this research, the hypothesis is verified by simulating the total deformation of tissue and the needle at the moment of puncture. The results show that the bio-inspired suture pin has a low deformation on the tissue at higher velocities at the puncture point and low deformation in its own structure when an axial force (reaction force) is applied to its tip. This makes the design stiff and thus require less force of insertion.

Women’s National Volleyball - Basketball teams in Albania performed in Drop Jump 60 cm

Volleyball and Basketball women’s have different performances from each other due to their special specifics of the game. From the specificity of their training, there are differences in the physical qualities of individual and team sports performance, where one of the elements is vertical jumping. This study is concentrated on two teams: Women’s Volleyball Team (V) and Women’s Basketball Team (B) 15 members each, focusing on 30 subjects. Players were measured in physical parameters; Age (V-24: B-27), Body Height (V-180.4cm; B-173.4cm), Body Weight (V-70.37kg; B-63.88kg), BMI (V-21.67 percent; B-20.93 percent). The players performed the test DJ60cm in the platform Leonardo Ground Force Reaction Plate (GRFP) which expresses Force max (kN), Power max (w/kg), Time Contact (TCs), Air Time (TAs), TA/TCs. The results obtained by GRFP showed different team values of the two sports in the parameters of Fmax V65.19-B74.07n/kg, Pmax V31.26-B23.06w/kg, TCs V0.231-B0.198, TAs V0.436-B0.34 and TA/TCѕec V1.96ѕ-B1.71ѕec. Results revealed that V players jumped higher (p, 0.001) than B players. Finally, the Drop Jump60cm test has different performance between individual players, despite the fact that in the team average it turned out that Volleyball players is higher in this test. Drop Jump is the typical plyometric test. Furthermore, tests such as DJ can be a useful method for assessing differences and monitoring vertical jump training programs from collective sports.

Experimental Analysis of FSW Process Forces

This paper presents the results of research work on linear friction stir welding (FSW) of magnesium AZ31 and aluminum 2024 alloys. During the FSW process, forces exerted by a tool on joined materials were measured. The measurements of forces were taken in three directions, vertical (Z axis) and horizontal (X and Y axes) directions, using high-sensitive piezoelectric dynamometer. The force analysis was done for three stages of welding process: plunging, dwelling, and welding. Conclusions regarding the force reaction of materials to be welded were formulated. It was found that the first two stages of the process, plunging and dwelling, are very important for the correct welding. In the plunging stage, a tool exerts the greatest forces and unit pressures (at the Z direction) on joined materials; during the dwelling stage, thermal conditions of the process are established. The welding stage was divided into two substages: the initial unstable and the subsequent long-term stabilized one.

Improvement of Structural Behaviour of Bubble Slab by Changing Bubble Thickness

Deflection of slab is the most important parameter by which we can calculate the depth of slab which is depend on total loads applied on the slab and span of slab between two column. The concept of bubble slab in which middle layer concrete is replaced by HDPE bubble which will helps to reduced its self-weight, deflection, moments & force reactions. The criteria of choosing suitable thickness of HDPE bubble are well mentioned in this paper with suitable examples so we can easily use that thickness value in practical on site. Static analysis of several models is done by finite element analysis method with tetra meshing by using Ansys ver. 15.0 as an analyzing tool. In this paper, results clearly specifies the structural behaviour change of bubble slab by changing its HDPE bubble thickness as well as its also specify the best thickness value of HDPE bubble. Bubble slab will be more useful on those structures in which intermediates columns is not required when the span of conventional slab is large then its deflection, moments & force reaction values is greater by which its depth is increased which makes conventional slab heavy so its total self-weight loads are transfer to column to footing which makes both increases in size & uneconomical. If we used the concept of bubble slab our nearly 35% self-weight of slab is reduced which positively effect on load transfer to other structural members and by this procedure whole structure will be more stable, durable & economical.

On the End-Point Deflection of Static Balanced Manipulators With Various Spring Configurations

This paper presented the accumulation deflection of manipulator with different spring configuration. Spring configurations achieve perfect static balance but they are different in deflection. Assuming the axial deflection is enough smaller than bending deflection and negligible; deflection is small and the link is rigid. Based on gravitational and elastic matrix, for most effective balancing, attachment angles of a spring are determined as four types (90, 0), (270, 90), (0,0) and (180,180). Attachment lengths of a spring are determined by magnitude of gravitational energy. Then, spring force, reaction force and deflection are determined. For illustrated examples, a given manipulator with configuration 4-1 S23 (180,180), S23 (0,0) and 4-2 S34 (180,180), S34 (0,0), the accumulation deflection in global workspace and maximum, minimum and RMS accumulation deflection are presented. In conclusion, the spring configuration 4-1 with S23 (180,180) is the best choice for designers.

Foot baropodometry regarding on body weight

While standing, we used baropodomerty to measure pressure on foot area. Human foot cause force reaction while making contact with the base. We also used plantogram and a special foam to measure foot size pressure and force as well as pressure and force that is appearing between the foot and the surface. In this work, we compared pressure between normal and deformed men and female foot against their body weight. With this analysis, we found that deformed foot makes bigger pressure on heel spur. In this research, we had 10 male and 10 female candidates. We were measuring weight, height and foot area as well as pressure and force that foot produce while walking. At the end, we concluded that the candidates with bigger body weight, made more pressure and force on their feet. We are hoping that this research will contribute in shoe factory to decrease weight on feet.

Based on MATLAB and Adams new pruning cutting edge shape and shear force simulation

Pruning is an indispensable tool for gardening. The pruning mechanism of pruning scissors and the shape of the cutting edge directly affect the efficiency of shear. Therefore, it is of great significance to design a new type of pruning scissors to improve the efficiency of garden work. It accords with the concept of green manufacturing energy-saving and environmental protection. The blade shape directly affects the shear efficiency. Therefore, the blade of the best Angle can improve the shear efficiency and save energy. According to the motion track of the moving blade and the shear mode. Using MATLAB software to simulate the shape of the blade of the best Angle. This work is instructive to the design of the blade. The force of the blade in the working process of shear force reaction scissors. Using Adams software, the dynamic simulation of tree branch was carried out. It is helpful to verify the shear performance of new pruning shears.