About integration opportunities between TRIZ and biomimetics for inventive design

AbstractThis paper presents the first results of a Ph.D. program aimed at investigating the domain interface between TRIZ and Biomimetics within the scope of inventive design. Indeed, a few authors have already proposed as a relevant direction of research the identification of integration opportunities between TRIZ and Biomimetics towards a more effective and efficient inventive design methodology. The paper presents a comparison between the tools based on functional modeling used during the process of problem solving within TRIZ and Biomimetics. This comparison intends to elicit overlaps, complementarities and incongruences of these techniques. The indications about how to improve the process of describing natural solutions in an engineering way and how to describe technical problems in order to use natural information as source of inspiration are given by analyzing few examples. The results are discussed in terms of necessary modifications in the engineering problem description in order to use a database of biological functions (i.e. the Biomimicry Taxonomy) as a source of natural knowledge in the process of inventive design

Network of contradictions analysis and structured identification of critical control parameters

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BEARING LOAD ANALYSIS OF RECIPROCATING PISTON COMPRESSORS

Case StudiesMany problems in today’s industrial environment require smart modeling assumptions in order to make them numerically accessible with an acceptable amount of effort. This case study shows how a field problem (main bearing failures) is turned into a numerical model: we present a bearing force analysis of a 5-throw reciprocating compressor with severe problems on its third main bearing. Inertial and gas-dependent forces are calculated. The crankshaft is modeled as a uniform beam; its load-dependent deformation and the resulting bearing loads are estimated based on Clapeyron’s three-moment equation with the assumption of zero bearing clearances. The resulting calculation time is < 1s for a 360-degree load cycle, allowing detailed studies that yield conclusive results: polar load diagrams clearly confirm that the problematic bearing is exposed to the highest loads in operation. The short calculation time allows for parametric studies investigating the effect of lower reciprocating masses, partial load conditions, counterweights, different crankshaft designs, or combinations of the above

Network of contradictions analysis and structured identification of critical control parameters

reserved3ETRIA has launched a partnership project with the publisher Elsevier; its Procedia Engineering publishing model was perfectly suited for this objective. For the first edition of publishing TRIZ Future papers under the Procedia flag, a subset of scientific contributions from ETRIA’s conferences has been selected. The papers selected focus on TRIZ science, originate from the years 2006 to 2010 and show contributions in the areas of design science, information and software as well as in sciences of education and management sciences. This collection of articles is composed by contributions of some 90 researchers in a dozen of different scientific fields. Through 70 articles, this book is therefore intended to be an image of the past and recent contributions of the TRIZ world in various disciplines and will encourage, we hope, other researchers to contribute to ETRIA’s TRIZ Future event in coming years.Alessandro Baldussu;Niccolò Becattini;Gaetano CasciniAlessandro, Baldussu; Becattini, Niccolo'; Cascini, Gaetan