IDEA #2HX7EO Stress-Strain Analysis Of Diesel Engines On The Basis Of Finite Elements Method And Holographic Interferometry

APPLIED RESEARCH • ENERGYAND ENVIRONMENTAL RESEARCH STRESS(cid:2)(cid:2)STRAIN ANALYSIS OOFF DIESEL ENGINES OONN THE BASIS OOFF FINITE ELEMENTS METHOD AND HOLOGRAPHIC INTERFEROMETRY Description A new technology for stress and strain analysis in complicated and extra complicated mechanical systems, such as diesel engines, is proposed on the basis of the finite elements method and holographic interferometry. The holographic speckle interferometry technique is the most advanced optical method used in the analysis of material deformation and frac(cid:2) ture processes, enabling non(cid:2)contact measurements to be carried out on the 3D field of rough surfaces. However, difficul(cid:2) ty in obtaining accurate results and absence of back(cid:2)propaga(cid:2) tion leads to a total failure of the analysis. The developed hardware(cid:2)software system includes geometric modelling in Pro/ENGINEER system, finite elements modelling in ANSYS and the parallel experiments on the holographic unit. The ver(cid:2) ification analysis of the results achieved and the adjustment of the models’ parameters is carried out by the specialized software. Innovative Aspect and Main Advantages The main novelty is that experimental and numeric examina(cid:2) tion is carried out as a single process. The results of examina(cid:2) tion are being compared not only at the end of the research, but also during the whole process. A tetra(cid:2)component model of a diesel engine system under examination is being devel(cid:2) oped on the basis of the suggested method of generalized parametric description of complex and extra complex mechan(cid:2) ical systems, in particular: 1) real object of research; 2) mathematic model of the physic(cid:2)mechanical process under consideration; 3) numerical (finite(cid:2)element) model; 4) experimental model (physical object model together with measuring equipment – a holographic unit). The main advantage is the combination of contemporary infor(cid:2) mational technologies, experimental research and mathemat(cid:2) ic models in a single process The suggested technology has substantial principal advan(cid:2) tages, such as: 1) 2(cid:2)3 times increase in the research efficacy; 2) The precision of displacement determination – up to 0,1 micrometer; 3) Contact(cid:2)free method of holographic interferometry annihi(cid:2) lates possibility of deviations in the conduct of sensitive objects; 4) The suggested method enables to determine the reaction of the object researched to the change of not only separate fac(cid:2) tors, but also to the variation of the whole multitude of factors; Areas ooff Application There are no fundamental limitations as to the nature of objects under consideration (machine(cid:2)building constructions, building constructions, bio(cid:2)mechanical systems, non(cid:2)linear phenomena of plasticity, creep, transient analysis, etc. 1. Precision instruments production 2. Microelectronics 3. Chemical engineering 4. Power engineering 5. Medicine 106 Fig.1 Hardware(cid:2)software system for stress and strain analysis in objects with complicated geometries Fig.2 Interferograms Fig.3 Numerical modeling Stage ooff Development Technological developments are done and worked out on the basis of soft hardware complex uniting the system of two(cid:2) processors computer stations, “SIN(cid:2)1” holographic unit and ANSYS, LSDYNA, Pro/ENGINEER, SolidWorks software. Contact Details Contact person: Mykola Tkachuk National technical University “Kharkov Polytechnic Institute” Address: Kharkov, 21 Frunze str., KhPI, departament TMM Tel/Fax: (380(cid:2)57) 707(cid:2)69(cid:2)02 Mob.: 8(067) 573(cid:2)61(cid:2)17 E(cid:2)mail: tma@kpi.kharkov.ua Web(cid:2)site: www.tensor.kharkiv.com