Bu çalışmada, AISI 1.2738 malzemenin farklı işleme parametrelerinde elektro erozyon tezgahında bakır ve grafit elektrot ile aşındırma işlemi gerçekleştirilmiştir. Kullanılan aşındırma parametreleri yapılan ön deneyler sonrasında üç farklı vurum süresi (100, 200 ve 300 µs), bekleme süresi (10, 20 ve 30 µs) ve boşalım akım (10, 20 ve 30 amper) olarak belirlenmiştir. Sinyal/Gürültü oranları ile belirlenen yüzey pürüzlülük değerinin optimum değerleri, vurum süresi için Seviye 1 (100 µs), bekleme süresi için Seviye 2 (30 µs), amper için Seviye 1 (10 A) ve elektrot için Seviye 2 (Grafit), anova sonuçlarına göre ise yüzey pürüzlülüğü üzerine en etkili parametrelerin sırası ile amper, vurum süresi, bekleme süresi ve elektrot olarak tespit edilmiştir.
The compressive performance of metallic sandwich panels signifies a key mechanical behaviour under compression loading. This paper describes the compressive performance of metallic corrugated core sandwich panels having different core configurations under quasi-static compression loads. Two different sandwich panel core configurations were studied: the corrugated monolithic core and the corrugated sliced core. The corrugated cores were fabricated using a sheet-metal bending technique with trapezoidal geometry and then bonded to surface plates. Aluminium 1050 H14 sheets were used as the core and surface materials. Sandwich panel samples were prepared and tested experimentally under a quasi-static compression load (compression rate of 2 mm/min). The force-displacement curves of the sandwich panels with different core configurations were obtained from the experimental tests. The compressive performance parameters included the maximum compression load, the average compression load, the energy absorption and the specific energy absorption. It was found that the core configuration played a key role in the compressive performance. Finally, when the compressive performance of these two different core configurations was compared, the corrugated sliced-core configurations exhibited better performance.
The development of fully personalised product design solutions for customers is hindered by lack of a satisfactory means of interaction. Mass production techniques used by manufacturing firms cannot be applied for user-centred design. A stronger interaction between customer and product can only be achieved when the customer guides the product generation via individual preferences and emotional needs. The aim of this article is to introduce a Kansei engineering (KE)-based methodology that involves customers in the product generation process by taking their preferences and emotional needs into account. The methodology is integrated by a CAD environment to provide a 3D dynamic product representation which is generated by individual customer preferences via fuzzy logic (FL) reasoning. For validation, the methodology was demonstrated by using the case study of an ironing board. Both functional and emotional needs were handled by KE implementation. By combining KE and FL, the methodology enabled the multiple quantitative demands of the customer to be addressed in order to generate a more personalised product in a responsive manner. Located in shopping venues, fixed and mobile stations for the customer decision-making process could facilitate increased customer satisfaction without need of a customer assistance desk.
Bending response of corrugated core metallic sandwich panels was studied experimentally under three-point bending loading. Two different core configurations were used: the corrugated monolithic core and the corrugated sliced core. The trapezoidal corrugated cores were manufactured from aluminum sheets via a sheet metal bending mould. After the sandwich panel samples were prepared, they were subjected to three-point bending tests. The load and displacement responses of the sandwich panels having different core configurations were obtained from the experimental testing. The influence of the core configuration on the three-point bending response and failure modes was then investigated. The experimental results revealed that the corrugated sliced core configuration exhibited an improved bending performance compared to the corrugated monolithic core configuration.
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