<p>This report describes a project carried out in cooperation with Klippan Safety AB. The purpose of this project has been to develop a product that facilitates the living area in a truck cabin for the customers. To be able to develop, in a structured way, that kind of product, the project has been based on different product development theories. The project contained of following parts: marketing research, product generation, product evaluation and prototyping. </p><p>After information from the marketing research and discussions with the company, the decision was made that the task was going to consist an improvement of the existing product referred to as 'the comfort module'. This product is a bed module with extra storage, a washbasin with flowing water among other things. Further investigations showed that there is a need for a bed with variable width for the comfort module, to ease the use and increase comfort. After some time, it appeared that the difficulty in this project was going to be to develop a mattress to be adjustable in width. With this in mind, and the fact that the time was running out, the project only came to consider development of the mattress. During the generation of concepts, the work had to be divided into two parts: mattress filling and mattress clothing. </p><p>For the expandable part of the mattress filling, the material IntelliGel was brought to light. The properties of this material were considered to fulfil many of the requirements that were set. But it has been difficulties to receive IntelliGel, and because of that the part of the mattress was missing in the result. Alternative solutions were searched for and proposal work has been given. The construction of the prototype has therefore been focused on manufacture the mattress clothing, where a few variants have been sewn and tested. To be able to test them properly, a testing frame has been used.</p><p>The result came to be a mattress clothing with variable width, and the prototype showed how it worked together with a foam mattress in the testing frame of different bed widths. The finished prototype appears to have development possibilities, where a fully functional solution estimates to be possible. The conclusions and experiences that have been made from this project could therefore be helpful in further work.</p>

This report describes a project carried out in cooperation with Klippan Safety AB. The purpose of this project has been to develop a product that facilitates the living area in a truck cabin for the customers. To be able to develop, in a structured way, that kind of product, the project has been based on different product development theories. The project contained of following parts: marketing research, product generation, product evaluation and prototyping. After information from the marketing research and discussions with the company, the decision was made that the task was going to consist an improvement of the existing product referred to as 'the comfort module'. This product is a bed module with extra storage, a washbasin with flowing water among other things. Further investigations showed that there is a need for a bed with variable width for the comfort module, to ease the use and increase comfort. After some time, it appeared that the difficulty in this project was going to be to develop a mattress to be adjustable in width. With this in mind, and the fact that the time was running out, the project only came to consider development of the mattress. During the generation of concepts, the work had to be divided into two parts: mattress filling and mattress clothing. For the expandable part of the mattress filling, the material IntelliGel was brought to light. The properties of this material were considered to fulfil many of the requirements that were set. But it has been difficulties to receive IntelliGel, and because of that the part of the mattress was missing in the result. Alternative solutions were searched for and proposal work has been given. The construction of the prototype has therefore been focused on manufacture the mattress clothing, where a few variants have been sewn and tested. To be able to test them properly, a testing frame has been used. The result came to be a mattress clothing with variable width, and the prototype showed how it worked together with a foam mattress in the testing frame of different bed widths. The finished prototype appears to have development possibilities, where a fully functional solution estimates to be possible. The conclusions and experiences that have been made from this project could therefore be helpful in further work.

This study aimed at defining useful guidelines for the design of an armored truck cab. Particularly, the quality and performance of ballistic steel were defined, considering not too high demanding requirements. Two steel grades, corresponding to hardness of 500 HB and 600 HB, and three different suppliers were selected. After dividing the truck cab into main areas, a FEM simulation was performed. The investigated model considered a specific standardized threat to impact against a double layer steel protection. Due to the high strain rates involved, the formation of adiabatic shear bands has been observed. However, the main purpose of the model was to find an ultimate thickness protection layout of armored steel plates. Thereby, the thicknesses to be attributed to the various components of the main areas could be estimated. Two alternatives were therefore hypothesized: the first considering the critical thickness case of penetration, and the second, an oversized version, supposed to be more resistant to penetration. It was thus possible to estimate the weight of the truck cab for the two above mentioned alternatives, and verify such hypothesized weight complied with the assigned requirement. A possible cutting operation was then considered in order to optimize the use of the steel plates. An estimation of the pre-series production costs of was finally derived. / Denna studie gjorde det möjligt att definiera användbara indikatorer och följa en möjlig multitasking-strategi för utformningen av en bepansrad lastbilshytt. Fallstudien syftade till att definiera kvalitet och prestanda av stål, vilket är ett av de vanligaste materialen för skydd, främst i de fall där kraven inte är så stora. Två stålkvaliteter motsvarande hårdhetsvärdena 500 HB och 600 HB valdes från var och en av tre materialleverantörer. Efter att ha delat upp truckhytten i några huvudområden startades en FEM-simulering med programvara från Impetus Afea. Modellen behandlade ett specifikt hot som var större än det önskade kravet på ett dubbelskiktsskydd. På grund av de inblandade höga deformationshastigheterna har bildningen av adiabatiska skjuvband observerats. Huvudsyftet med modellen var emellertid att hitta en ultimat skyddslayout för tjockleken, så att de tjocklekar som skulle tillskrivas de olika komponenterna i huvudområdena kunde härledas. Två alternativ antogs därför, det ena med tanke på den ultimata tjockleken och den andra med tanke på en skyddslayout som antas vara mer motståndskraftig mot penetrering. Det var således möjligt att uppskatta hyttens vikt för de två alternativen och kontrollera att den uppfyllde de fastställda kraven. Därefter övervägdes en möjlig skäroperation för att optimera användandet av de tillgängliga stålplattorna.