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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.


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..!!



Mechanical designer


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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?




Acurate Size Measurements of Nano Particles and Nano Pores Make Mechanical Understanding Easy

Encouraged by its current and prospective customers, Ebatco’s Nano Analysis and Testing Laboratory (NAT Lab) has expanded its nano/micro scale analytical and measurement capabilities significantly. More than ever before, customers can gain insights and comprehension of what is going on and why it has happened at the nano/micro scale.

IOSO application for casting processes

Dear Colleagues,

New practical case studies made with the aides of IOSO in new engineering fields prove universal capabilities of IOSO Optimization Technology applicable to wide variety of real-life problems. Let us provide you the brief description of the problem that was solved by Italian engineering consultancy company XC Engineering for the well-known Swiss production firm Buhler. The problem was to search for the optimal velocity of the piston in an HPDC process. 


NANOVEA's picture

Micro Scratch Testing CrN Coating on Titanium Alloy

Specific Coatings are used to further increase performance of titanium alloy parts at elevated temperatures. More specifically, Chromium Nitride (CrN) Coatings are designed to perform under conditions of high load and temperature. By using scratch testing it is possible to detect premature adhesive failure of the CrN coating in real-life applications.

Position Available - Solid Mechanics - Houston, TX

Position has be filled and is no longer available 5/4/2010.

Henry Tan's picture

Subsea Integrity

I am teaching Subsea Integrity for the MSc students majoring in Subsea Engineering at the School of Engineering, University of Aberdeen. This is a course that combines the fundamental principles (corrosion, fracture, fatigue and material selection) with the industry applications (subsea integrity management and implementation, cathodic protection, case studies on subsea reliability and engineering assurance).


Teaching time schedule

Hao Meng's picture

Mechanics of porous material

Hi all,

I am going simulate a plate of porous material (SiC) to evaluate its strengh.

Would someone share some knowledge on the mechanics of the porous materials.



connielan's picture

Looking for a post-doc position in computational mechanics and structural engineering. I will be your best choice

Having achieved many goals in my career of computational methods in structural mechanics, structure engineering, finite element method and computational simulation of structural construction process, I am interested in widening my professional horizons by seeking new challenges. I am looking for a postdoctoral position in computational mechanics and structural engineering.

Engineering position open

Smith International, Inc., 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.   

Sigma Technology shares the success of aircraft buiders (IOSO news)

29 January 2010 New Russian Fifth-Generation Fighter made his first flight. This aircraft was designed by company Sukhoi with the new engines designed by NPO Saturn. We would like to express our proud and mention that both companies have used IOSO Optimization software as a regular part in their design and development technological cycle.

Mike Ciavarella's picture

Ferrari Millechili project --- the next generation of sport car

I am going to Modena on Monday to talk to my collegues in the Millechili lab (MilleChili means 1000Kg in italian)


Ferrari S.p.A.


American Engineering Group LLC's picture

Challenges in the finite element analysis of tire design using abaqus

Finite Element Analysis of Vehicle and Tire has become a very important aspect of a tire design and failure analysis to most Tire companies. Tire modeling with ABAQUS is a very complicated process involving complex materials like hyperelastic rubber and textile reinforcements, large model size, prolonged simulation time and various convergence issues. This white paper intends to help in understanding the challenges in tire analysis and several tips and tricks that makes a difference in the quality of the results and processing time.

Xiao-Yan Gong's picture

Nitinol Webinar next week




An Introduction to the Unique Material Properties of Nitinol

Shell vs. brick elements in buckling analysis

Dear All:

I have a structural problem which deals with "Buckling" analysis of a boom with a rectangular cross-sectional area

and 0.25 in. thickness.

Can I use brick element (8 nodes) instead of shell element to simulate buckling of this type of structure? 

Thank you for your insight.


Disk vs blade natural frequencies

I'm trying to determine the coorelation of a blade natural frequency and disk (nodal diameter) natural frequency on a Turbine wheel in ANSYS Modal analysis.  Is it possible for a blade natual frequency to be excited even though a disk natural frequency is not being excited??  I'm having trouble determining if a blade frequency is related to any disk nodal diameter.  Thanks for any incite on this subject.

FEA Improves Reliability of Flip-Chip Packaging

On Aug 10, 2009, Semiconductor International (SI) Newsbreak published a report on my work in AMD about 3D fracture study of underfill delamination as the top story in that issue.  I have never imagined that. Except the pleasure I received from this good news, I wonder if this work is also interesting to iMechanica community.  For that reason, I attach here the SI news report and the original paper published on ITherm2008 Proceedings. Welcome any comments and thoughts.

The Boundrical Conditions On Knee Model

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Hello All Dear:

I have a model of the knee with its soft tissue between 2 femur and Tibia Bones, then I want to load 2 boundrical condition

s on it , 1- The 6-DOF's of Tibia and Femur Bones Center of Mass, (x,y,z,R1,R2,R3) time dependent. and 2-The

concentrated  load that is exerted on the cross section of the Tibia Shank (Lower Bone) Time Dependent. Then Dear, Can

anyone Help Me,Please how to Put these 2 kinds of Boundrical Conditions on the Model.

Kind Regards.

Amir Hossein.


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