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

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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

08 September 2019 8,174 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..

06 July 2019 2,923 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...

04 May 2019 3,374 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...

02 March 2019 6,455 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...

01 February 2019 7,967 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...

31 December 2018 3,537 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...

08 September 2018 6,023 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...

06 July 2018 7,222 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 6,189 6 View

How to compare two groups with only two measurements?

Hiiiii everyone! I have an enquiry on statistical analysis. I was looking for many forum and it's still cannot solve my problem. I want to compare means of two groups of data but only with two...

03 March 2021 8,796 3 View

What is the most Operating System (OS) which can be INSTALL on Tiny hard devices like Raspberry Pi (RPi) hardware ?

I'm targeting to deploy a mesh network and manually configure MANET routing protocols. I'm preparing scenarios, architectures, and hard devices needed to do that. Are there some step-by-step...

03 March 2021 1,931 5 View

Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence?

I am on the lookout for the Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence. Does anyone know where I can find it? Thank you in advance

03 March 2021 3,568 1 View

What kind of fluid could I use for a pitfall trap that also does not invalidate molecular testing?

Hi, I want to start testing pitfall trap to obtain ants samples, but I need to conduct molecular analysis on those insects. So, what kind of fluid can I use? Ethanol expires too early and I need...

03 March 2021 5,978 5 View

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

After a reference from Int J Body Compos Res, can any body help?

Hi, I am after the reference below, my library says it cannot obtain a copy either locally or internationally, any help appreciated! Chris Wang ZM, Heshka S, Wielopolski L, Pi-Sunyer FX, Pierson...

03 March 2021 6,193 1 View

Do we need to write protocol for a second study of a systematic review that has been registered and published?

I have conducted and published a systematic review and meta-analysis research with the topic related to public health and health pomotion (protocol was registed in PROSPERO). Now we want to...

03 March 2021 8,920 3 View

How to increase a model accuracy ?

dear community, my model is based feature extraction from non stationary signals using discrete Wavelet Transform and then using statistical features then machine learning classifiers in order to...

03 March 2021 6,994 5 View

What techniques can I use to determine the miscibility of polymer blends?

The term miscibility refers to the single-phase state in thermodynamics. I do not mean the compatibility of different components. To determine the miscibility I know several techniques such as...

03 March 2021 4,107 4 View

Do I need to do linear regression before running mediation analysis using PROCESS MACRO by Hayes ?

I just wanted to check if I need to run a linear regression separately if I am using PROCESS MACRO to run mediation analysis. Thank you.

02 March 2021 4,359 3 View