Dakshitha Weerasinghe

10 Questions 13 Answers 0 Followers

Questions related from Dakshitha Weerasinghe

Can you fill a shell volume with SPH in LS DYNA?

Hello All! I'm finding it hard to fill the attached keyword shell volume with SPH elements. Can anybody tell me why? Is it because of the complex geometry? Thanks in advance

09 September 2019 8,298 1 View

Strain Rate in LS DYNA user defined materials?

Hello All! Anybody knows a better way than eps(i) / dt1 to calculate strain rates in a UMAT? I'm trying with eps / dt1 but apparently it is not giving me a proper rate-dependent result. Thanks..

07 July 2019 3,110 8 View

Software other than ANSYS and MCalibration to get Mooney Rivlin Constants?

Hello All! I am using both ANSYS and MCalibration to get model constants for a 9 parameter Mooney Rivlin model using my uni-axial tension test data. These two software give me extremely different...

05 May 2019 3,467 7 View

Can I cite data from an accepted conference paper?

Hello scholars! I have to use some experimental data for my manuscript. However, the experimental data have not yet been published officially. They have been included in a conference paper, which...

03 March 2019 6,540 2 View

How to pass strain rate to subroutine in LS Dyna?

Hello Scholars! I'm implementing a user-defined material subroutine in LS Dyna. I intend to build a rate dependent model, so I have to use strain rate as a variable in my model. I'm currently...

02 February 2019 8,093 3 View

Re-using content from previously published own publications?

Hello Scholars! I recently published a paper and wish to draft another manuscript. For the Introductory part of this new manuscript, the intended content is similar to a section I have...

01 January 2019 3,622 0 View

How to select the optimized time step value for FEM solution of a ballistic impact problem?

Hello scholars! I'm trying to simulate ballistic impact on fabric materials. I have made a model and simulated at different velocities. But I'm getting a problem as shown below in the attached...

09 September 2018 6,115 3 View

How to check if my LS Dyna mesh has penetrating elements?

Hello scholars! How do I check if my mesh has penetrating elements? The meshed sections should just touch each other's surfaces but not penetrate. I have designed and meshed and want to know if...

08 August 2018 9,981 3 View

Hello scholars! What's a good material model (eg MAT_015_JOHNSON_COOK) to predict FABRIC material failure by impact loading (Eg. bullet)?

Hello scholars! I'm new to LS Dyna. Trying to figure out what's a good material card in LS Dyna would be best suitable to predict failure of a fabric weave under impact loading. I'm a little...

07 July 2018 7,308 0 View

Can I directly copy text from my old papers for my new papers?

Hello Scholars! I am wondering if I am violating copyrights issues and risking plagiarism if I copy-paste certain amounts of text from my own previously published papers. This is since I am...

01 January 1970 6,302 6 View