Category: ESAComp

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Harri Katajisto

Harri holds a Master’s Degree in Mechanical Engineering from the Helsinki University of Technology with a focus on lightweight structures. He has been the member of the ESAComp team since 2000 and joined Altair in 2017. He considers himself as a middleman working closely with industry, research and software development aiming to provide practical software solutions for the Composites Industry together with the Altair Composite Technology Team.

Latest posts by Harri Katajisto (see all)

• ESAComp introduces “through-the-width” debonding/delamination analysis - September 12, 2017
• Structures are not ideal – Challenges of buckling analyses - October 15, 2015
• Partner Spotlight: HyperWorks 14.0 brings further integration with partner products - March 22, 2016

Delamination is a recognized, major failure mechanisms for composites. The separation of the internal layers within a composite, caused by high through-the-thickness stresses, can arise due to manufacturing defects or from impacts occurring during assembly or whilst in-service. Delamination can … Read More

• Author
• Recent Posts

Harri Katajisto

Harri holds a Master’s Degree in Mechanical Engineering from the Helsinki University of Technology with a focus on lightweight structures. He has been the member of the ESAComp team since 2000 and joined Altair in 2017. He considers himself as a middleman working closely with industry, research and software development aiming to provide practical software solutions for the Composites Industry together with the Altair Composite Technology Team.

Latest posts by Harri Katajisto (see all)

• ESAComp introduces “through-the-width” debonding/delamination analysis - September 12, 2017
• Structures are not ideal – Challenges of buckling analyses - October 15, 2015
• Partner Spotlight: HyperWorks 14.0 brings further integration with partner products - March 22, 2016

A thin-walled axially compressed CFRP cylinder was studied using the large deformation analysis. Different numbers of axial, circumferential and combined imperfection waves were used to represent the initial shape of the structure. Three examples are shown at the bottom of … Read More

• Author
• Recent Posts

Harri Katajisto

Harri holds a Master’s Degree in Mechanical Engineering from the Helsinki University of Technology with a focus on lightweight structures. He has been the member of the ESAComp team since 2000 and joined Altair in 2017. He considers himself as a middleman working closely with industry, research and software development aiming to provide practical software solutions for the Composites Industry together with the Altair Composite Technology Team.

Latest posts by Harri Katajisto (see all)

• ESAComp introduces “through-the-width” debonding/delamination analysis - September 12, 2017
• Structures are not ideal – Challenges of buckling analyses - October 15, 2015
• Partner Spotlight: HyperWorks 14.0 brings further integration with partner products - March 22, 2016

Thin-walled cylindrical shells (radius-to-thickness ratio of 160-500) under different loading conditions have been studied for structural stability (Figure 1). Based on this study, guidelines for the selection of the element mesh density have been set. A set of problems presented … Read More

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Markku Palantera

Director of Global Composites Business Development at Altair

Markku Palanterä is the Director of Global Composites Business Development at Altair, in which role he promotes Altair’s complete offering for composite design, optimization, and simulation. Markku joined Altair in 2017 through the acquisition of Componeering Inc. and its ESAComp software. He was a founder member of the team that started ESAComp software development at Helsinki University of Technology in the early 1990’s as a project for the European Space Agency (ESA). In 2000, Markku along with a few colleagues established Componeering to continue software development and to commercialize ESAComp. He holds a Master’s Degree in Aeronautical Engineering from Helsinki University of Technology.

Latest posts by Markku Palantera (see all)

• HyperWorks Composites Go Multiscale with Expanded Classical Capability - August 28, 2018
• At the origins of delamination stresses – Free edge analysis gives insight - January 12, 2013

When you make a tensile test for [±45/0/90]s and [90/±45/0]s laminates you may observe different failure strengths. This may seem first surprising since the laminates are basically the same – only the stacking sequence is different, which should not influence … Read More