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NANOVEA's picture

Nanoindentation Fracture Toughness

The ability of a material to resist cracking, or fracture, has been vital to the studies of fracture mechanics. Until recently the study of fracture toughness has been analyzed at a macro range using powerful instrumentation applied to large samples.

NANOVEA's picture

Nanoindentation Creep Measurement

Creep can be characterized as the result of a solid material that is slowly and permanently deformed under the influence of stress. Deformation results from the consistent stress below the yield strength of the material. The amount of applied stress and its duration can eventually lead to the failure of the given material. Ultimately, it is for this reason that Nanoindentation creep measurement provides crucial information to study material behavior.

negetive spring

Can some one suggest different ways of making spring of negetive spring constant??

 

NANOVEA's picture

Cyclical Nanoindentation Stress-Strain Measurement

The Stress-Strain curve obtained by Nanoindentation reveals the correlation of "Stress" and"Strain" of a given material under nano controlled loads. Unlike the traditional Tensile Testing method of obtaining Stress-Strain curve data, which gives data at a macro level, the Nanoindentation method provides vital Stress-Strain curve data at nano level scale without the large and intense machinery. The Stress-Strain curve of various materials will vary widely.

Engineer III Schlumberger

Job Opening Schlumberger, a Fortune 500 Company, is a world-wide leading supplier of premium products and services to the oil and gas exploration and production industry, the petrochemical industry and other industrial markets.  We are seeking to hire a qualified candidate to fill the position of Engineer III in our Houston, TX location. 

vibration test fixture design

Hello all,
 
I am a fresher; I just started working for a company leading in passenger cars.
I have been given a project in which I have to design a vibration test fixture for passenger car bumper.
Currently, we manufacture fixture in-house. And for every bumper, separate fixture is made.
My task is to design a test fixture (for testing frequency range of 0- 70 Hz) which will be modular.

NANOVEA's picture

Microindentation & Fracture of Mineral Rock

The use of Microindentation has proven to be a crucial tool for rock mechanics related studies. For example, Microindentation has been used to advance studies in excavation by allowing further understanding of rock mass properties and its separation. Microindentation has been used to advance drilling studies to improve drill heads and improve drilling procedures. Microindentation has also been used to study chalk and powder formation from minerals.

NANOVEA's picture

Paper Roughness Measurement With 3D Profilometry

Paper surface topography is vital to the intended use and quality of the product. To control paper product quality it will heavily rely upon quantifiable, reproducible and reliable surface measurement. Precise surface measurement and evaluation of a paper product can lead to the best selection of processing and control measures. The Nanovea 3D Non-Contact Profilometer utilize chromatic confocal technology with unmatched capability to measure paper surfaces.

Xosé Manuel Carreira's picture

Release DOF of beam in Abaqus/Explicit

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Hello everybody,
I am trying to model a plate (shell elements) supported on rubber bearings and columns (beam elements) and I would like to know how to release rotational degrees of freedom at one or both ends of a beam element in Abaqus/Explicit.
Unfortunately, the keyword *RELEASE only works in Abaqus/Standard.
Thanks in advance for your kind help. Regards,

NANOVEA's picture

The Understated Contributor to International Economic Recovery

While R&D topics continue
to lead as a beacon for economic recovery, a crucial part of the R&D process
continues to receive little to no attention. And make no mistake, you are about
to learn of the single most important factor in the advancement of new or
improved material technologies around the world.

Shabeer Khan's picture

Internship in Computational Mechanics (plasticity)

Dear Members,

 Hope you will be fine. 

I am student in MSc Computational Mechanics, here in Nantes France. I am looking for an internship  which is compulsory part of master degree. I am interested in materials, processing/modeling and simulation. I would be grateful for your guidance and help.

 Thanks and Regards,

Shabeer khan 

Literature regarding the appearence of cracks in steel. Thermal, pressure fatigue

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Hello!

I am wondering if anyone could recomend som literature for me to get my hands on.
If there is any literature regarding how the appereance of a crack in a piece of thin metal (~0,5mm - 1 mm) could be related to pressure fatigue or thermal fatigue.
Does the crack due to thermal fatigue have a specific appereance and so on. I need get my hands on practical pictures and so on, not equations.
Are there any signs in the vicinity of the crack that is indicating that this could be due to pressure fatigue.

Any help is much appreciated.

Thanks

Alok CG's picture

Material Testing Machines

Can anyone guide me how to get crosshead speed range equal to or greater than 1:3000 in a motorized electromechanical material testing machine? The load capacity should remain same even at lowest speed.

Soil Pile imteraction in ANSYS ASAS-NL

Hi,

In order to model a jacket supported by four piles I need to model the interaction between soil and piles in ANSYS ASAS-NL. As I want to make a trasient analysis I use ASAS-NL which unfortunately do not interact with SPLINTER. The jacket structure is modelled by 3D beam elements. Can someone tell me how I model the soil pile interaction? Is it possible to make use of P-Y and T-Z curves in ASAS-NL?

ANSYS CODE FOR FATIGUE CRACK PROPAGATION

Hi all,

     Currently, I am using ANSYS 12.1 for the fatigue crack propagation simulation for the edge crack & center crack plates. It is a mixed mode crack propagation.

 

Can anybody please tell me or guide me how to write the code in the ANSYS using APDL for automatic remeshing around the cracktip when crack propagates to the new position?

 Thanks in advance. :) 

Simple Open Source Solver

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I found the below thread, and thought this would be a good place to ask about open source FEM.

forum/357

But unlike that thread, I want something that is very simple, that can be run with just a single .exe.  I only need to solve basic structural problems and perhaps eigenvalue problems.  Orthotropic material capability is needed, but input for a composite material via lamina and stacking sequence would be better.

N14 engine standard parts engine ,do you have interest ?

engine upper set:4089371 with engine , pump,water use of cummins diesel engine , camshaft use for cummins diesel , and other standard parts of mobile loader N14-E cummins engine .

buckling analysis for cylindrical ring

Dear Members Hello

 

I am conducting buckling analysis for cylindrical ring (Short and thick cylinder) with Lateral Pressure.

 

Simulating Hole punching operation using MSC Marc

Does anyone who has previously worked on MSC Marc worked with the concept of element activation and deactivation...?

I need to do a simulation wherein a hole is required to be punched in an alloy steel bar.

The issue is that I am not sure as to how to go about this.

If there is anyone who can guide me through this ..I would appreciate it..!!

Regards,

Krunal. 

Mechanical designer

R13239

Posting Date
7/2/2010

Expiration Date
7/16/2010

Job Category
Engineering/Technical

Job Title

NANOVEA's picture

Warpage Measurement of PCB With 3D Profilometry

Flatness measurement of electronic parts and assemblies, or PCB’s, has become increasingly critical as geometries become smaller: finer pitches, smaller solder ball volumes, thinner substrates, etc. Additionally, processing temperatures vary and can play a major role in PCB warpage and or planarity defects.

The use of IOSO Optimization and ABAQUS at Civil Structures of NPP (from ABAQUS Users' Conference)

At the stage of NPP civil structure design for determination of stress-strain state (SSS) at static and dynamic loading ABAQUS is widely used. Hereto the floor response spectra are determined for calculation of loadings on the equipment at special dynamic impacts (seismic, air shock wave, aircraft crash). In case if the obtained characteristics of SSS or spectral accelerations exceed maximum permissible values, designers take actions on strengthening the corresponding structural components.

question on double cantilever beam test

I have a beginner's question on DCB testing of polymers. The fracture strength during Mode 1 loading increases with crack length due to the compliance of the test specimen. In other words it becomes harder to induce fracture as the crack length increases.Is my understanding correct?

Thanks

Venkat

 

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