Technical feasibility


PARTEA A: Identificarea rezultatului cercetării-deZvoltării (CD)

·         The project team

             Echipa proiectului

Advisor’s Name:Nume:  Dumitru Constantin
Phone:Telefon:  +40.723.163396
Expecting date of valorization plan submission:Data aşteptată pentru trimiterea planului de valorizare  27.02.2012

·         Identification of R&D activity

Identificarea activităţii de cercetare-dezvoltare (CD)

Acronym:Acronim:  ARMS_Analytic Research of Mechanical Stresses in a Truck Strength Structure
Author of the R&D result:Autorul rezultatului CD:  Dr. Eng. Ilincioiu Dan
Company or University:Companie sau Universitate:  UNIVERSITY OF  CRAIOVA, ROMANIA 
Phone:Telefon:  +40.723.038606
Sector:Domeniu:  ENG – Engineering
Type of the R&D result:Tipul rezultatului CD:  Model matematic


Partea B: Planul de valorizare

SECTION I: Testing

SECŢIUNEA I: Testarea/încercarea



Has the R & D result been tested?A fost testat/încercat rezultatul CD?







The following question is replied according to the reply in question 1

Următoarea întrebare este formulată în legătură cu răspunsul la întrebarea 1


If yes

Dacă răspunsul a fost DA:



In what mode has the result been tested?•           Prototype

•           Pilot Application

•           Alpha/BETA testing

În ce mod a fost testat/încercat rezultatul?

•           Prototip

•           Aplicaţie Pilot

•           Incercare Alpha/BETA

1b. Please describe and discuss the testing resultsVa rugăm să descrieţi rezultatele testate/încercate


If no:

Dacă răspunsul a fost NU:


Describe what type of testing does the R&D result need?Descrieţi ce tip de testare/încercare necesită rezultatul CD?
Detailed commentComentariu detaliat


Validation is primarily a process of comparison the model and its behaviour with the real system and its evolution.

Model validation process includes three stages:
• building a model with a high degree of validity;
• validation of model assumptions;
• comparing the sizes of input / output model with the ones of the real system.


Mathematical model presented has a high degree of generality, the phenomena are defined parametrically. By generating an automatic computer program using this model, several constructive and loading variants can be studied. To check-up the model viability, by using an automated computer program designed by the authors, it was examined the constructive version that is using rolled profiles IPN360 (strut) and IPN200 (transverse bars) with features. Structure dimensions are a = 100 cm, b = 150 cm, c = 100 cm, d = 100 cm, e = 50 cm. Steel has elasticity modules E=2.1×106 daN/cm2, G=0.8×106 daN/cm2. It is considered the case of load: P = 2000 daN, Q = 1000 daN, F = 100 daN.


1d. What is the time needed for testing?Care este perioada de timp necesară testări?
Time needed for testing and probing is estimated at 30 working days.
1e. What is the cost needed for testing?Care este costul necesar pentru testare?
The costs of research and results validation are estimated at Euro 1500. The costs related to testing and probing of mathematical model are estimated to be 1000 Euro.

SECTION 2: Current Stage of Development

SECŢIUNEA 2: Stadiul actual de dezvoltare



To what extent does the development team have technical resources for supporting the production of a new product? (Researchers, human resources, hardware, etc. )În ce măsură dispune echipa de resursele necesare pentru a asigura fabricarea noului produs? (Cercetători, resurse umane, hardware, etc.)
The research team has the human resources needed for the development of analytical research on mechanical stress in a truck chassis structure. The experts required to complete the team are in the computer science (programmers).

The research result comes from experimentation conducted by a team of experts who want to optimize these results further.

In this respect, the team of experts is available for technical advice, so that potential partners can start practical implementation of new software product.

The existence within the organization of equipment and software is a sound basis for design, testing and probing stages.


What are the technical issues that need to be tackled for full deployment, if needed?Care sunt aspectele tehnice ce trebuie abordate pentru lansarea în fabricaţie, dacă sunt necesare?
Technical issues to be addressed for practical implementation of this research:
- Present a mathematical model to determine the analytic structure of mechanical stress in a truck chassis structure;
- Developing the computer program;
- Software design. 

The mathematical model defined must be improved by introducing variables which enabling the movement of loads on the structure; also, the horizontal components of the loads should be introduced to investigate the bearing capacity of structure to a complex spatial stress.



What additional technical resources are needed for the production of this new product?Ce resurse tehnice suplimentare sunt necesare pentru fabricarea acestui nou produs?
Special data collection equipment (sensors, strain gauge marks). For installing them further research is needed to be done by specialized companies in this field.




Overall assessment of the current stage of technical development.Evaluarea generală a stadiului actual de dezvoltare tehnică
Detailed commentComentariu detaliat


In analyzing the mechanical structure of a heavy transport vehicle it is found that the key element, on which all major elements are mounted, is a metal frame made of rolled steel. Major component parts of the strength are the two struts, cross-linked by a few transverse bars. On struts there are mounted: wheel gear axles, engine, cabin, cargo loading system. In analyzing the structure’s designed shape it was found that it is leaning in 6 points (wheels), having two closed geometric contours.


Citiţi fonetic


To assess the mechanical stress it requires calculation of reactions and efforts. If we consider spatial loads (a certain direction), it appears that mechanical system is three times statically non-determinate outside (reactions in wheels) and twelve times statically non-determinate inside (non-determination of efforts); thus the mechanical assembly of strength is 15 times statically non-determinate. The normal operating regimes of the truck is analyzed, in neglecting the transitional or accidental regimes; thus it is found out that loads are vertical and structure has  vertical longitudinal plane of symmetry (geometrically and mechanically).


If we consider that the structure is only stressed vertically and symmetrically, then the supports (wheels) are only causing an exterior non-determination, and the closed contours are causing 4 inner non-determinations; therefore the mechanical system is five times statically non-determinate. Mechanical loading capacity of the structure is easily to study by means of mechanical tension.


To calculate tensions, it is required to define mechanical loads; an operation that depends on solving the static non-determination; geometric characteristics of structure bars cross section are also required. As a result, we will proceed to schematizing the structure, both geometrically and mechanically; static non-determination has to be resolved, and loads have to be defined within all the bars of the structure and finally, the equivalent mechanical tensions will be calculated for each element of construction.



SECTION 3: Deployment

SECŢIUNEA 3: Lansarea în fabricaţie


Define the demands for large scale production in terms ofDefiniţi cererea pentru producţia de masă în funcţie de:
  • Materials
  • Materiale
After creating and testing the experimental model, setting of all suppliers of materials, components and sub-assemblies required to achieve the numerical model to determine the mechanical stress in a truck chassis structure, as well as the delivery terms, then it is going to implement it in practice, along with its promotion on domestic and foreign markets.
  • technologies, tools, machineries
  • Tehnologii, utilaje, maşini
To implement the numerical model that is evaluated in practice, the following are required:
- Identify technologies for measuring and experimentation;
- PC computers, printer, photo-copier, graphic stations.
  • Staff effort
  • Resurse umane
 Estimated human resource requirements:
- Market survey staff;
- Investment operations staff
- Trainers for the operators
- Staff for advertising, publicity and expertise operations.



SECTION 4: Overall Assessment

SECŢIUNEA 4: Evaluare generală



What is you overall assessment of the technical feasibility of the research result?Care este evaluarea generală a fezabilităţii tehnice pentru rezultatul CD?
The strength structure of a transportation power-driven vehicle is a bars system that builds-up a complex frame, space loaded. Due to the multiple constraints and to the closed geometrical contours, the mechanical system is not only exterior but also interior redundant. In order to evaluate the value of mechanical stresses by analytical calculation, the non-determination  must be solved. In this paper the mechanical non-determination calculation is made using the stresses method, only the transverse stress and the torque load will be taken into account.



 For a proper structure of the three-axles trucks, the stresses distribution in the component bars will be determined. Thus, the determined calculation will make the basis of an automatic running program that allows the deceleration of different influences of the geometrical and loading parameters over the mechanical stresses. An application will be made on a particular structure using the constructive elements of a heavy transportation power-driven vehicle.


The model is worthwhile with regard to its implementation in practice, namely its promotion on domestic and foreign markets.




Evaluare cantitativă (0-5)


Please put X as appropriate.

Vă rugăm să marcaţi cu X  punctajul considerat corespunzător


1 2 3 4 5
Adequacy of testing activity undertaken so farGradul de adecvare al activităţii de testare desfăşurate pănă în prezent X
Adequacy and availability of technical resources of the development teamGradul de adecvare şi disponibilitatea resurselor tehnice ale echipei X
Current development stageStadiul actual de dezvoltare X
Overall technical feasibilityFezabilitatea tehnică generală X


We agree that all informations contained in this form to be made public in the project „Inter-regional cooperation for valorization of research results – INTERVALUE”, by publication on the project website:

Suntem de acord ca informaţiile cuprinse în acest formular să fie făcute publice în cadrul proiectului „Inter-regional cooperation for valorization of research results – INTERVALUE”, prin publicarea lor pe site-ul proiectului, la adresa:

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